Story

Abducted!

By Xerox2

https://www.furaffinity.net/user/xerox2/

Disclaimer: This story is a work of adult fiction. It contains content some readers may not enjoy such as transformation, mind control, parasites, breeding, and non-consensual sexual situations.

.-=o=-.

“Do you ever think about getting pregnant?” Sarah asked as she dried her hands under the bathroom’s air dryer.

Katherine furrowed her brow. They’d been friends forever, and she’d never said anything like that before. “Like having kids, or actually being pregnant?”

“I mean being pregnant. Having another living thing growing inside of you.”

Katherine stuck out her tongue. “I’m never going to get knocked up. Giant belly, sore breasts. lactating? No thanks. I’m happy just the way I am. Besides, once you have kids, they’re your whole life. I want to accomplish things.”

Sarah giggled. “I was right there with you for the longest time, but then you meet that special someone. . .” she trailed off, gazing upwards with a smile.

Katherine stifled a groan. Sarah was talking about Tim again. That was all she ever talked about these days. Wasn’t it enough that they spent every waking minute wrapped in each other’s arms? As soon as they got back to their table, Sarah would be all over Tim again, holding hands and kissing obnoxiously between bites.

“That’s just your supercharged hormones talking again,” Katherine joked.

Sarah rolled her eyes, “You’re probably right.”

It made sense to Katherine that Sarah would be the first to go baby crazy. Ever since puberty, she’d been a little jealous of Sarah’s hormones. It had been difficult to watch her best friend transform into a well-endowed beauty while she was left with a slight, girlish figure. Still, she didn’t envy the strange urges the hormones seemed to bring.

“Try to hold off on the kids until your first anniversary,” Katherine teased as they stepped back into the restaurant. It was easy enough to spot their table. It was the one Nate, her giant beefcake of a date, was looming over.

Nate hated this restaurant's stupid fancy chairs; he barely fit in them. He looked around for Sarah and Katherine. The sooner they got back from the bathroom, the sooner he could leave this terrible double date.

His best friend Tim smirked at him from across the table. “You’re not doing so hot with Katherine tonight, are ya?”

Nate put on a fake smile. He was beginning to think Tim had set up this stupid date just to show off how utterly infatuated he and Sarah were.

“Don’t worry, I’m working my magic,” Nate lied. “She’ll be all over me by the time we’re done stargazing.”

Tim grinned. “Is that so? I’ll bet you $20 you don’t get laid tonight.”

“Yeah right,” Nate scoffed. He had a thing for petite women like Katherine, but she seemed like an emotionless robot, full on. No way he’d get into her pants tonight. They’d hardly said a word to each other all dinner. The only thing they had in common was that their best friends were fucking.

When the women returned, Sarah ignored her chair and sat right on Tim’s lap. Mercifully, Nate didn’t have to wait long for the check. He quibbled with Tim over who had the privilege of paying, but quickly gave up. Tim seemed ready to turn it into one of their famous week-long competitions, but Nate just wanted the nightmarish dinner to be over.

The group piled into Sarah’s SUV and started on their way to their town’s most popular stargazing spot. Nate was staring out the window trying not to get carsick when he saw a shooting star bright enough to light up the sky. He wished he was home watching sports, or at the gym working out, or anywhere other than this car.

“You really can see a lot of stars from here,” he observed.

Katherine nodded in agreement. “Yeah. Look at that big pink one!”

“Where?” asked Sarah. “Oh I see it! Wow it’s huge. Maybe it’s a comet or a meteor or something.”

“It’s getting bigger,” Tim muttered, and indeed it was. Soon it was larger than any other star, then half the size of the moon, then larger still. Nate was getting nervous.

Katherine sat upright with fear and cried, “it’s not getting bigger. It’s coming straight at us!”

The meteor hurdled toward them, and soon the pink light filled the night sky and flooded the car, casting stark shadows throughout the interior. Nate clenched his eyes anticipating the collision, but it never came. The source of the light, now far too bright to look at, hovered above them.

There was a jolt, and the SUV’s engine revved as its tires lifted off the ground. Everyone but Katherine screamed and panicked as an unseen force pulled the two ton car up into the air.

“It’s a UFO!” Tim shouted.

Nate wanted to argue with him, but considering that their car was flying straight up toward the unnatural light, he thought better of it. Before he could come up with a more reasonable explanation, a wave of dizziness overcame him and he lost consciousness.

.-=o=-.

When Nate opened his eyes, he found himself somewhere that didn’t seem like the inside of a spaceship. Everything was made of wood. Light streamed in through knotholes in the ceiling, and the walls creaked in the wind. It was a barn. His clothes had disappeared, and he was laying on a pile of hay that poked and scraped his bare skin. Sitting up, he found the rest of the group holding their heads and moaning as they came to. They struggled to conceal their nakedness, clasping their hands over their privates. They were in a stall.

“Did we crash?” He asked, pushing himself to his feet with one hand while the other protected his modesty.

“We couldn’t have,” answered Katherine. “No one has a scratch on them.”

Nate inspected the others, initially to confirm that no one was injured, but then out of curiosity. He couldn’t resist stealing a glance or two at the pair of blushing women standing nearby.

Katherine had no trouble covering her small, perky breasts with one arm, but Sarah had more difficulty staying modest. She was taller, more voluptuous, and her breasts were massive. Even with both her arms crossed in front of them, there was plenty to ogle. She crossed her legs, but it did little to hide the patch of well-maintained pubic hair between her legs, or her wide child-bearing hips. She was a full-on babe. He wondered what a hottie like her saw in scrawny-ass Tim.

Tim averted his eyes from the women in an attempt to be polite and ended up looking at Nate. But when he saw what was between his best friend’s legs, his idle glance turned into a stare. Tim knew Nate was stronger and taller than him, but, as it turned out, he also had a much bigger dick. It was so large Nate was having trouble keeping it covered, even using both of his hands. It was an honest-to-goodness pornstar penis, hefty and plump but long enough to hang down past his sizable balls. Even though Tim was as straight as an arrow, he couldn’t help but gawk. He knew he was just average. Average height, average weight, average dick. He felt inadequate, especially when he noticed Sarah also stealing a glimpse at his friend’s crotch. He needed to say something.

“I think we were abducted by aliens.”

Nate nodded. “They must have wiped our memories and dropped us off in this stable.”

“What did they do with our stuff?” worried Sarah.

As the questions multiplied, Tim’s heartbeat quickened. How could this situation get any worse? He waddled to the gate, but the latch was stuck. He moved to climb over it, but when he tried to reach past the gate, he hit an invisible wall. It didn’t make sense. There was no barrier that he could see, but he couldn’t move past it. He turned back to the group.

“Guys, we’re trapped. And this isn’t a stable.”

Suddenly, a loud hiss filled the air. Tim would have jumped, but he found himself frozen in place. Try as he might, he couldn’t move a muscle. His friends were frozen as well, their panicked eyes staring out of fixed expressions on their faces.

Then the stable itself flickered, warped, and faded away into an empty, cube-shaped room. The entire place, walls, floor, and ceiling, was covered in a grid of flawless white tiles. A section of the wall opened up with a sharp swoosh. Two creatures entered the room, and Tim’s stomach flopped. They were aliens.

At first glance they looked like giant lizards with six legs. They had long bodies, sported thick tails, and their heads had wide, reptilian muzzles. That is where the resemblance to Earth creatures ended. Their legs were longer and less splayed out than a lizard’s, giving them more of a dragon-like posture. Their smooth pebble scales were a sort of grey-green color, but the larger one was a shade darker. They scurried up to the humans on all six legs but shifted into a four-legged stance as they started examining their catch.

Tim screamed internally as they approached him first. The larger alien used its cold, scaly hands to reposition his body into a standing position with a wide stance, pulling his arms away from his privates in the process. Then each alien produced an instrument that looked like a stainless steel chopstick and promptly started using them to poke and prod his helpless body. The larger one lifted up his lips to look at his teeth, then inserted one as far as it would go into his belly button, then into his ears and up his nose. They chittered and hissed at each other as they worked.

Tim’s eyes bulged with terror as he got his first up-close look at real, live aliens. They were huge, standing a solid eight feet tall with four of their legs planted on the ground. Each alien stared down at him with two pairs of glassy black eyes. Their muzzles had four nostril slits and long fleshy tendrils sprouting from their upper lips. Their faces were expressive and intelligent.

Sarah, positioned on the opposite side of the room, was treated to an excellent view of the aliens’ backsides. Their tails were long and fat like a lizard’s, but rounder and more flexible. Their twin tips waggled in front of her face, and were anything but ordinary. Instead of ending in a featureless point, the scaly skin gave way to a smooth, fleshy tip with a slit-like opening at the end. It looked to Sarah like a dick, but without a mushroom head. The scaly skin of their tails was like a foreskin that partially covered the sensitive-looking organs. One of them brushed against her cheek, leaving behind a smear of viscous fluid that smelled like turpentine.

The alien’s chittering turned more enthusiastic as they examined Tim’s genitals. They used one rod to lift up his limp penis and caressed his testicles with the other. The instruments began to thrum and vibrate, and Tim’s dick swelled. He wasn’t horny in the slightest, but soon his penis was standing up, fully, achingly erect. The aliens looked at each other, made a sound that could only have been a laugh, then moved on to the next captive.

They examined each of the other humans. Nate was also given an erection when it was his turn, his monstrous cock standing proudly in the air for everyone to stare at. The women weren’t spared an embarrassing examination when their turn came. The aliens used their probes to part their vulvas and test their depth. Sarah blushed furiously as they violated her in front of her friends. She closed her eyes, as if that helped.

Once everyone had been examined, the larger, darker alien moved out of view and returned holding a strange creature. It looked like a bright pink jellyfish that had been stretched from a perfect circle into an oval. A multitude of short, thin, tentacles that swayed and undulated beneath it. The alien brought this creature over to Tim and placed it gently onto his forehead, lying it lengthwise so that it sat like a floppy pink mohawk.

Sarah watched as the jellyfish quickly lifted its tentacles and pushed them into her boyfriend’s scalp. Tim’s eyes once again filled with terror and then, a moment later, relaxed. If the intrusion hurt, his half-lidded eyes gave no sign of it. Katherine was next to have a jellyfish placed on her head, then Nate. Both reacted the same way that Tim had. Finally, one was brought to Sarah. Her eyes watered with fear as she felt the cold, gelatinous creature paced against her skin. A very curious and disturbing chill ran down her spine, and suddenly, she too relaxed. It no longer worried her that they were being held captive by aliens that were planning to do who-knows-what with them. She felt the tentacles pushing into her skin and down through her skull, but there was no pain, only calmness.

The aliens turned away from the humans and started having what appeared to be a very heated conversation, spitting and hissing and chirping and chattering. Their indecipherable quarreling rang in her ears as the jellyfish caressed her brain.

Sarah’s state of artificial serenity lasted about a minute. As she came to, the aliens were still bickering about who was going to take the blame for this colossal mistake. Wait, that wasn’t right. She shouldn’t know what they were arguing about. The noises they were making still sounded the same, but she found that the longer she listened, the more she understood.

“My decision is final!” hissed the larger, darker one. “I will ask The First to show mercy on you.”

“Hisssss. . . Yes, doctor Sslsskss.” The smaller one replied. “Here he comes!”

The door opened once again and another alien entered the room. This one’s skin was a deep charcoal grey, almost black, and while the other aliens were nude, he wore a blue band of fabric around his upper torso.

“Chief veterinarian Sslsskss,” he rumbled, menacingly. “Please explain what these are.” He nodded his head toward the humans.

“Ah yes, He-Who-Is-Greater-Than-I. These are the new livestock, four examples of the dominant species of Stellar Object 190294, as promised.”

The leader lumbered over to the humans and squinted his four eyes. “I was told that they would look more like this.” A hologram flickered to life in the middle of the room. It was a perfect depiction of a chestnut stallion. “Has there been a mistake?”

Doctor Sslsskss swallowed nervously. “Ah yes. Perhaps, a small one. It seems that my apprentice, Klkss here, mistook a domesticated species to be the dominant one. These creatures, stupid and primitive as they are, are the only creatures on the planet that are intelligent enough to suit our needs.”

There was a pregnant pause while the leader considered the situation. “Doctor, how long will it take to synthesize a serum for this species’ genetic pattern?”

“At least a week. Perhaps longer.”

“I cannot wait that long. We are in desperate need of bioslugs. You know that more than anyone.” They all hissed to themselves for a while. “Would it be possible to use the serum you prepared for the other species on this one?”

The doctor glanced at Sarah with a look that turned her stomach. “Hisssss. . . Perhaps. I can make no guarantees. The effects on their bodies and minds would be unpredictable. They could end up as nothing more than a pile of genitals, or it might drive them mad. It could even kill them.”

“A small chance is better than no chance, doctor. Select the most virile pair and administer the serum you made for the. . .”

“It is called a horse, He-Who-Is-Far-Greater-Than-I” churred Klkss the apprentice.

“Administer the serum you prepared for the horses to the breeding pair, and begin work on a serum tailored to this species immediately.”

“Yes, yes. Immediately, He-Who-Is-Merciful.”

With that, The First turned and left. The humans looked around frantically, the artificial calmness of the jellyfish having given way to sheer panic as they wondered which of them would be the first to be subjected to what they now realized was a dangerous, alien experiment.

The apprentice relaxed visibly. “Whew! That was close. I thought for sure The First was going to recycle me.”

“Another mistake like that and I’ll recycle you myself!” snapped the doctor. “I am thirty-third and you’re 402nd, it would be well within my rights. Now, fetch me two bioslugs, and be careful! We only have five left.”

Klkss gulped and scurried away.

The veterinarian turned to the humans and, for the first time, spoke to them directly. “Hisss. . . Close your eyes if you can understand me.” Everyone’s eyes shut. None of them decided to close them. They just moved on their own, like a reflex. “Good. Now open them.” Their eyes opened.

“Excellent. It appears that the t’tssk have fully integrated themselves into your rudimentary, centralized nervous system. When I release the forcefields you will not move from your locations or take any violent actions.”

A small semi-transparent holographic control panel appeared in front of Sslsskss’s hand. He twitched his finger, and Sarah found herself able to move again.

She immediately started screaming.

“Gah! Hissss. You will not make loud noises!” He frantically chittered, covering his ear holes. Sarah stopped screaming, but continued vocalizing at a more reasonable volume, mostly babbling incoherently in terror. She wanted more than anything to scream and run, but her body wouldn’t let her. She wiggled her fingers and said her name just to prove to herself that she still had some control over her body.

The alien flicked his wrist, and Nate, Tim, and Katherine were freed from the forcefield. The men groaned and moaned nervously, but Katherine was silent.

Katherine reached up and touched the t’tssk on the top of her head. It was cold and slick. To her horror, she found that she could feel the touch of her fingers against it. It made sense if the creature had truly interfaced with her brain. She traced her fingers around the edge but couldn’t find a clear place where the creature ended and her forehead began. Incredible. She wanted to keep prodding it, but it was too sensitive.

“What did you do to us?” Nate asked as the rest of the group inspected their new pink crests with looks of horror on their faces.

Just then Klkss returned, a large egg-shaped container hovering behind him.

“Ah, there you are. Excellent. How should we designate this livestock? You are the expert on the relevant planet.”

Klkss pointed to Sarah and Katherine. “Yes, um. These two are called ‘mares’, and these two--” he pointed to Tim and Nate, “are ‘stallions.’”

“We have names. I’m Katherine.”

The others began to timidly introduce themselves as well, but the doctor interrupted them. “You will all ceace communicating.” They fell silent.

Klkss pursed his claws nervously. “Now that The First is gone, just what are the odds that this will work?”

“These animals share 87 percent of their DNA with the creatures we prepared the serum for.”

The apprentice’s face lit up, “So 87 percent chance of success?”

“No, you idiot!” snapped Sslsskss. “It doesn’t work like that. I suspect their reproductive systems will be properly altered, beyond that I can only guess. Now, give me your probe.”

He snatched Klkss’s probe away and opened up a holo-panel in front of himself, tapping away as he continued speaking. “Let’s begin. You, stallion, and you, mare,” He pointed to Nate and Sarah, “come here.”

The pair approached the alien, sweating and shivering with fear. Sarah stared back at Tim as she took her compelled steps.

“That’s close enough. Now turn around, get down on four legs like a civilized creature, and present your rears.”

The couple got down on their knees and leaned forward, raising their bare asses into the air. As they assumed the exposed, vulnerable position, Sarah blushed furiously, and Nate frowned and tried not to make eye contact with anyone.

Klkss reeled back and stuck out his bright green tongue. “Eck! These are the orifices they use to expel waste! Disgusting!”

“Hisss. . . indeed, but they are filled with sensitive membranes and an ideal location to administer the serum and bioslugs.” The doctor’s holo panel disappeared, and the metallic instruments in his hand began to warp and change shape. “You, smaller stallion, come here.”

Tim panicked. Had his body been under his command, he would have run away. Instead, he steadily advanced until he stood between the naked asses of his lover and best friend. The alien presented the two reshaped probes to him. They had a narrow tip, a large bulge in the middle, and a flared base. In fact, they looked exactly like small, stainless steel butt-plugs.

“Take these probes and insert them into the excrement-holes of the other two.”

Tim’s hand reached up and took the probes from doctor. He desperately tried to stop himself, but no matter how much he resisted, his body moved with a will of its own. There was a fleeting flicker of freedom as he chose which of his friends would be first. He turned to Nate and kneeled behind him, his face closer to his best friend’s hairy, well-toned ass than he ever wanted.

“Don’t do this, Tim.” Nate pleaded, clenching his asshole. “Please! Listen, I’m sorry I told people about your browsing history. You don’t have to do this!”

Tim frowned and touched the tip of the rod against Nate’s opening.

“I’m. . . I’m sorry.”

With that, he pressed the probe inward. Nate’s asshole strained against the invader, but it was no use. Tim cringed as the probe pressed inside, until the widest part of the probe disappeared into his friend’s body. Nate clenched his ass around the far side of the bulge, inadvertently pulling the plug out of Tim’s fingers as it sank in to its flared base. Once inside, the probe began to thrum and vibrate. Tim could see it expanding, stretching Nate’s opening wider than it had ever been stretched before. Nate groaned and pushed, but the metal plug had grown too large to force out.

“I’ve modified the probes with a custom program,” Sslsskss explained to his apprentice. “They will clean the waste from their bowels, administer the serum, and prepare them for the bioslugs.”

Nate breathed heavily, making little vocalizations as he exhaled. “It feels. . . So weird. . . So big! Tim, help. Please.”

Tim wanted to help, but even if he wasn’t being puppeted by the jellyfish on his head, he wouldn’t know where to begin. The probe had nearly doubled in size, and it only barely fit to begin with.

Doctor Sslsskss let out a slow appreciative trill, and for a fleeting moment Tim felt somehow relieved that the doctor approved of his actions. “Good. You will insert the other probe into the mare now.” The doctor turned to Klkss. “It is important to be very clear in your instructions. The integration of a t’tssk always carries some cost to the subject’s intelligence.”

Tim’s anxiety returned as his body repositioned itself behind Sarah’s plump bottom. He didn’t feel any stupider, but he started to worry. Maybe the jellyfish on his head had diminished his intelligence, and he would normally have no trouble finding a way out of this situation. He gazed at his lover’s familiar, shapely ass, tears forming in his eyes.

“Oh God, Sarah. I can’t stop myself. I’m so sorry.”

“I know, Timmy, I know. Just, please, be gentle.”

Thinking quickly, Tim spat onto his fingers and rubbed them on her flawless, pucker. He raised the probe to her asshole and applied steady pressure until the tip slipped inside. She was much tighter than Nate, but his saliva was an effective lubricant. The probe slid in easily. He had always wanted to try anal play with Sarah, but not like this. He placed a calming hand on her hip as he continued.

“Ow!” Sarah yelped. “Slow down!”

He was already pushing as gently as he could. “Try to relax, love. It will be easier.”

Sarah’s asshole loosened momentarily as she tried to comply, but when the insertion accelerated, she clenched reflexively. Then, just as it had for Nate, the probe’s bulge passed through her straining hole, and the plug thudded into place. Sarah moaned with relief as it lodged itself inside her innards, and Tim, who was mortified at what he’d done, leaned forward and kissed his girlfriend’s butt cheek in apology.

Next to them, Nate was groaning loudly. “It’s too big!” The plug was stretching his hole to its limit, and at the same time vibrating against his prostate so intensely that a string of precum was hanging from his dick. Soon Sarah’s voice joined in, moaning in discomfort as the probe expanded inside of her.

“Excellent.” hissed the doctor. “Watch closely, Klkss, there is much to learn.”

The apprentice was leered at the scene out of the corner of his eye. “Blech! I find their primitive digestive systems disgusting. The very thought of producing and excreting waste makes me want to stick my tongue down my own throat.”

Sslsskss chuckled. “It won’t be long before our modifications cleanse them. Soon their metabolic systems will produce only useful, non-toxic byproducts. Well, if they survive.”

Katherine closed her eyes and covered her ears to shut out the horrors around her, but Tim couldn’t help but watch. Sarah and Nate were lost to the world as they endured the overwhelming sensations coming from their asses. Then, a few agonizing minutes later, the probes stopped vibrating and began to shrink.

“Finally. The probes have finished their preparations. You, smaller mare, go reach into the incubator over there and fetch me two bioslugs. Be careful, they are very valuable.”

Katherine’s body moved of its own accord to the egg-shaped incubator. It was smooth and shiny like polished glass. There was a sphincter-like opening on the fat end, and the moment she was close enough, her hand shot out and pressed inside. She sneered in disgust as the slimy opening swallowed her arm. The bottom of the container was alive with slick, wriggling creatures. She grabbed one and pulled it out. The bioslug wrapped around her hand like a constrictor. She stared down at the creature with fascination and fear. It was as long as her forearm and twice as thick. Its malleable body was semi-translucent with electric blue highlights, and its head was adorned with a crown of three meaty stalks that waved about in the air like antennae. She reached in with her other hand, grabbed another, and brought them to the alien veterinarian.

Doctor Sslsskss stroked Katherine’s new crest when she arrived, and it felt marvelous. The probes in her friends’ asses had shrunk back to their original size. Their assholes, now thoroughly stretched and drugged, gaped open around the devices, twitching in a vain attempt to clench shut. The probes slid out of their oversized holes and clattered to the ground, now restored to their original chopstick shape.

“Mare, place the slugs on their behinds then step away.”

Katherine coaxed a slug off of her hand and onto Sarah’s lower back. She gasped as its hot, slimy body made contact with her skin. The slug had a very particular way of moving. It would twitch its head left, then right, and finally stretch its body in its chosen direction and pull its rear up behind it. Katherine watched it quickly hone in on Sarah’s gaping, twitching asshole. It paused a moment at her opening, stroked the sensitive flesh with its head stalks as if trying to discern whether or not this was truly the anus it wanted to crawl into, and finally pushed its fat head inside.

“No! Stop it! Get it out of me!” Sarah wailed. The slug’s body was more pliant than the probe, but it was much larger. The creature came alive with a flurry as it squirmed its way inside her swollen colon. Katherine watched as inch after inch of the slimy slug disappeared inside her best friend and estimated that it was already wriggling up into her intestines, far past the abdominal muscles that would have had a chance of pushing it out.

“It’s so deep! Pull it out before it’s too late!”

Katherine heard her pleas, but she had already moved behind Nate and placed the other slug right on his ass crack. His slug wasted no time locating and entering his abused rectum. Nate yelped, the back half of the slug’s body flopping around behind him like a perverse tail.

Klkss scrutinized the wriggling slugs. “What would happen if we introduced the bioslug without the serum?”

Sslsskss had reopened his holo panel and answered without looking up. “The bioslugs would replace the subjects’ reproductive system, but without the blueprint of the serum to guide them, they would continue to convert their organs into reproductive tissue without end. Eventually the host loses its motility. . . ”

While the doctor was lecturing, a glint from the probe on the ground beneath Nate caught Katherine’s eye. She carefully reached out with her still-slimy hand and touched it. Then Nate grunted loudly, and she jumped.

Nate’s erection had diminished after the probe had been removed, but now it was back with a vengeance. The slug tickled the inside of his rectum as its rear slapped against his thighs. The deeper it crawled, the more it stimulated his swollen prostate. He tried to squeeze his ass shut and stop the slug’s progress, but all it did was cause his hefty dick to slap against his abs. The slug writhed and wriggled as it filled his colon, bringing waves of unwanted pleasure. He wanted to hate the invasion of his body, but he couldn’t stop the sensations flooding through him any more than he could stand up and pull the slimy creature out of his ass.

The slug flexed, and another segment of its ribbed body popped inside of him. He moaned again, this time less of an agonized wail and more an unbidden expression of pleasure. His cheeks burned with embarrassment. He sounded, full on, like a helpless, horny slut! His friends would think he was some kind of pervert who was getting off on being raped by a giant slug. Yet as the slug pulsed again and another blissful gasp escaped his mouth, he wondered if it was true.

For all of Nate’s humiliation and concern for his appearance, nobody was paying much attention to him. Katherine was walking stiffly back toward Tim, shaking the slime from her hands. Tim was staring, captivated at Sarah who herself was wholly occupied with the invasion of her own entrails.

Nate felt the creature’s slippery tail slurp inside, and his asshole close behind. He stopped resisting the incredible feelings and indulged himself. Each squirm and every slither poked his prostate and pushed him closer to the precipice of pleasure. Having never experimented with anal before, the feeling was thoroughly foreign to him. He savored it. He leaned into it, and before he realized what was happening, he found himself teetering on the edge of an orgasm. He tried to take it back, to distract his mind and prevent the inevitable, but it was too late. His bowels spasmed and clenched with an unknown strength as his innards lit up with pleasure. He moaned loudly, cock flexing in time with his gut’s contractions, sending jet after jet of cum onto the spotless tiles beneath him.

The aliens watched dispassionately, chatting about about the pros and cons of the ship’s new shift rotations.

Once the slugs had fully disappeared, Doctor Sslsskss dropped to all six legs and inspected Sarah and Nate’s ravaged behinds. “That should do it. Now we wait.” He turned to the humans. ”When I leave, you will be able to move and speak freely, but you are not to injure yourselves or the others.”

He turned and led Klkss to the door, but paused. “Aren’t you forgetting something?”

The apprentice looked back at the groaning humans, contemplating. “The probe!” He scurried back and snatched the probe from the ground near Sarah.

“These sloppy mistakes will be the end of you, Klkss. . .” Sslsskss muttered. With that he tapped a few keys on his holopanel and the stables’ interior flickered back into existence around them. The aliens were nowhere to be seen. Tim and Katherine found themselves back in their stall, while Sarah and Nate were in the one adjacent. Even knowing it was some sort of hologram, everything about the environment seemed completely real down to the last detail. The air even smelled like dried straw.

Tim shouted, “Sarah!” and dashed to the edge of his enclosure. He tried to climb the wall into Sarah’s stall but was blocked by a forcefield. She and Nate were rolling on the ground, clutching their stomachs.

“Oh, God!” Cried Sarah, gripping at her ass, “It’s so deep inside of me!”

Nate rolled back onto his hands and knees and raised his behind toward her face. “Pull it out! Pull it out!”

Sarah gasped. “I -- I can’t.”

“Please! Reach in and grab it! I don’t care!”

“No it’s not that. It’s your asshole. . . it’s disappearing!” It happened right in front of her eyes. His pucker squeezed shut, and the wrinkles around it smoothed out. It gave one final twitch before becoming indistinguishable from the skin around it.

Nate groped at his hole but found nothing. “Ahh! It’s gone!”

Sarah reached back between her own cheeks and was relieved to find her asshole intact, though it gaped open from the ordeal. Several of her fingers accidentally slipped inside, and she shuddered. That felt good. She massaged her sphincter with her fingertips. Unlike Nate, she hadn’t felt any pleasure from the wriggling of the slug, but now her legs quivered in bliss. She inserted her pinky finger and bit her lower lip to stifle a moan. She now had four fingers buried in herself, but it wasn’t even a tight fit. The aliens must have really stretched her out. Maybe she could reach the slug! If she could just get a little deeper. . .

Sarah folded her thumb against her palm and pushed. Her asshole, still sloppy with slug slime, easily swallowed her hand up to her wrist. She grunted a guttural moan of delight, and everyone stopped what they were doing and watched.

Tim was transfixed. “Jesus, Kath. Can you reach it?”

Sarah didn’t hear him. Her asshole, and the bizarre bliss emanating from it, were her entire world. She wiggled her fingers, tickling her silky insides and sending sparks of pleasure shooting through her body, up her spine, down her legs. She wanted more. She curled her back, stretched her shoulder, and pressed her forearm a few glorious inches deeper.

Once again, she moaned loudly, erasing any doubts that she was enjoying herself. In fact, she had completely forgotten why she had buried her arm inside herself until her fingertips brushed against the muscular tail of the slug deep inside of her. She tried to pinch it, but it slipped away. She strained to reach, but her back was painfully contorted as it was, and she couldn’t get her arm any deeper.

Sarah sighed and relaxed, letting her hand slide back out to her wrist. What was the point in trying? Their bodies were already changing. She could feel her digestive tract rearranging around her hand. Her colon was straightening out, opening up, and the fleshy walls that were velvety smooth just seconds ago, were growing ribs and nodules that gripped her arm needily. She took a moment to rub the new textures inside of her and savor their heightened sensitivity.

“Did you get it?” Asked Nate, leaning in.

Sarah blushed and pulled her hand loose with a loud slurp. “No.” Embarrassed by her unusual display, she sat on the ground to hide her loose, changing asshole.

“Are you okay?” asked Tim, peeking over the wall.

“Well let’s see,” Sarah mocked, crossing her arms in front of her breasts. “First we go on the world’s most boring double date. Then, we get abducted by freakin’ pervert aliens who probe us. Then my boyfriend sticks a giant butt plug in me. Then my best friend lets a giant slug climb inside of me. Now I’m trapped in a prison on a spaceship, and my body being modified by aliens who don’t even really know what species we are. Did I miss anything?”

Tim was quiet for a moment. “You forgot the part where they put these ‘t’tssk’ things on our heads.”

Sarah threw her hands in the air. “Of course! How could I forget about my mind-control jellyfish? You know, the one that is making me stupider? So yeah. I’m doing just fantastic, Tim.”

“What is up with these t’tssk things?” Nate asked, running his hands along the rubbery pink crest on his head. “It feels like a part of me.”

Katherine grunted. “Ugh. I hate it when you say that word.”

“What?” Asked Nate. “T’tssk? That’s what it’s called.”

“Yes. It’s one of their words. Just think how easily you’re using their language. It should disturb you too.”

Nate rolled his eyes, turned, and mooned Katherine. “Look at this! You are talking to a man whose asshole just disappeared. Not having a hard time finding things to be disturbed about. In fact--” He winced as his stomach interrupted him with a loud, sustained gurgle. “Ooh. I don’t feel so good.”

“Neither do I. . .” Sarah groaned, clutching her abdomen.

Katherine squinted down at Nate’s behind. “Nate, you’re turning blue.”

Everyone looked, and sure enough, centered where Nate’s asshole used to be, there was a patch of sky blue skin. The color was spreading like an ink splotch, hair shedding anywhere it touched. Soon his entire ass was as smooth and blue as a blueberry. Sarah felt a wave of warmth as the blue skin crept around the outside of her hips. She watched her pubes fall to the floor in clumps as it spread to her groin.

“Well at least I won’t have to wax anymore.” She muttered, turning away from everyone and discreetly examining her pussy. Her inner labia had turned a dark navy, almost black, but the shape was different too. Her outer labia were merging together, almost as if they were being zipped up with a zipper. She ran a nervous finger between her lips and couldn’t find her clit or urethra.

Nate was also staring at his crotch, but he had given up trying to hide it. Just like Sarah, his curly pubes were the first to go. He cupped his balls as they darkened into a deep navy. His scrotum, tight and wrinkled from the cool air, smoothed out and sagged. His testicles throbbed and swelled, each heartbeat permanently increasing their size. His scrotum stretched taut around balls as large as hen’s eggs, and still they grew. Soon they were too large to fit comfortably between his legs, and they pulled back until they sat prominently beneath his asscrack. He reached behind himself and palmed one of his massive testes. He would have to be careful sitting down from now on.

Everyone stared openly as Nate’s cock underwent its own growth spurt. His balls’ midnight hue flowed down its length. It was visibly swelling as it flopped flaccidly in front of him. It fattened up until it was disproportionately thick and then stretched down, gaining length. Then it happened again, then again. By the end of the third stretch, it hung down to his knees and was as thick as a soda can. The growth stopped. Nate hefted its weight with both hands and gawked at it in disbelief.

“Holy shit! I’m a freak!” He exclaimed, touching and squeezing his new penis. The flesh was solid like he was erect, but instead of being rigid and straight, his shaft was flexible. A webbing of veins branched into existence across its surface, the main arteries as thick as his pinky. They were softer to the touch than the rest of his dick but still surprisingly solid. Next, the head of his penis flattened. His glans lifted and swelled, its edge scalloping into ridges. His urethra stayed relatively human-shaped, though it grew considerably, stretching to match the size of the rest of his cock.

Nate held his dick right in front of his face, staring in awe and terror. Then, a jolt passed through his loins, his balls clenched, and a jet of pearly semen spurted out and hit him right between the eyes. He dropped his dick in surprise, and it flopped down, slapping his thigh. The slimy cum stretched all the way from his nose to the tip of his cock. It was extremely viscous.

Tim and Katherine covered their mouths in disgust and turned away, but Sarah was transfixed. Sitting where she was, Nate‍’s dick was dangling right in front of her face. She knew she should have been disgusted, but instead she was curious. She wanted to reach out and see how it felt in her hand. Was it warm? Smooth? Heavy? She wanted to lift it to her nose and see if it still smelled like a human dick. More than anything, she wanted to taste that slimy cum and see if it was salty and bitter or sweet and syrupy.

She reached a hand between her legs to masturbate, but everything felt wrong down there. Her outer labia had continued to close up, and now there was now nothing more than a mound between her legs with a tiny opening at the top. She touched the hole with a fingertip and it dilated open. Black ribbons of labial flesh bloomed outward like like flower petals. Sarah poked and prodded through the slippery tangle of labia, but she couldn’t find her vagina, nor did she find the touch pleasurable.

A small, muscular tube emerged from the center of it all and strained forward a few inches before relaxing. A crown of three fleshy nodules surrounded an opening at the tip, looking like the head of the bioslug that she could still feel squirming in her gut. It looked almost as if her vagina had prolapsed, but it didn’t hurt. She tried inserting a fingertip, but it was uncomfortable. She pinched the tip of the length, pulled gently, and, to her surprise, it extended. She was able to coax another foot of the strange organ out of its home before she let go and watched it pull back into her body. Once it was fully retracted, her outer opening pursed and closed again, hiding the whole affair away until the only hint of it was a mound between her legs.

Sarah looked back at Nate’s dick. There was no way she could fit that thing inside her changed pussy. It was nearly as big as a horse’s cock, and it was starting to resemble one. Two pronounced medial rings formed on his shaft. The blunt head looked more like a horse’s than a human’s as well, save the human-like urethra. The edge of his glans sprouted three fleshy nodules that quivered and stretched like they had a mind of their own. She remembered feeling similar stalks popping inside of her one at a time as the slug pushed into her asshole. It hadn’t been enjoyable at the time, but now she found the thought enticing.

Nate managed to get the cum off his hands by wiping it onto the wall. He glanced back down at his dick and was surprised to see that instead of growing, it seemed to be getting shorter. But it wasn’t shrinking; it was retracting back into his body. He could feel its length sliding into his abdomen, filling up some new passage that served as its home. The whole time, it remained just as hard and flexible as ever. It stopped leaving only a few inches of shaft and the flat, ridged head dangling out of his new sheathe.

It was then that he noticed Sarah standing and brushing herself off. The skin from her knees to her hips had turned robin’s-egg blue, but other than that she seemed relatively unchanged. Suddenly, he felt very self-conscious. He clasped his hands over his crotch and turned toward her so that she couldn’t see his swollen testes. She reached a hand back to her ass, then furrowed her brow and got a troubled look on her face. She noticed him staring but didn’t try to cover herself.

“Nate,” She said, softly. “Come here.”

Nate approached, balls shifting behind him with each step.

She waited until he was close, then spoke quietly. “Nate, I want you to look at my ass and tell me what’s happening down there.”

“What?” Tim wailed suddenly. “I can do that for you, Sarah! Don’t have Nate do it. Let me.”

Sarah glared at Tim. “I want Nate to do it. He’s going through the same thing as me right now, and besides, he’ll be able to get a closer look.”

“But.” Tim swallowed nervously. “Look at him. He’s turning into some kind of sex monster! His balls are bigger than my fists. There’s no telling what he’ll do. He could rape you!” He turned to his friend. “No offense, Nate.”

Nate frowned. “Hey, man. That’s not cool.”

“Yeah, Tim. Not cool. And how could you say that? You’re the one who probed us against our will, not Nate.”

Tim was taken aback. “I didn’t want to. I was being mind controlled!”

“Well. . . whatever. It’s my choice who I get to examine my ass, and right now I want Nate. If you want to help, you can leave us alone.”

“But. . .“

“Come on,” Katherine said, stepping away. “Let’s give them their privacy.”

Tim opened his mouth to respond but thought better of it and followed Katherine back into their stall. The walls were high enough that it was difficult to see much without stepping right up to them. So suddenly, Sarah and Nate were alone together.

Sarah turned to Nate and rolled her eyes. “I’m sorry. He gets really jealous. You know he didn’t mean any of it.”

“No, he was right. I mean look at me.” Nate uncovered his privates and gestured to himself. Sarah had already seen his changes, but took the opportunity to get another eyeful. “I am turning into a monster.”

She placed her hand on his shoulder. “You’re not a monster. Or if you are a monster, then so am I.”

“Thanks, Sarah.”

“No problem. Now, would you please tell me what the hell is going on back there?” She said, pointing a thumb behind her. Nate nodded.

Sarah turned around and leaned forward, pressing her hands against the wall. He squatted to get a closer look, balls resting on the ground between his feet.

“Well,” she whispered, anxiously, “what do you see?”

He stared for a while and then said, “nothing. It’s gone.”

“Gone?”

“No, wait,” he whispered, leaning closer. “There’s something covering your buttcrack. It blends in. I didn’t see it at first. It’s growing from your pelv-- tailbone. You have a tail!”

“I do? What’s it like?”

“Well it’s about half a foot long and fairly wide, but it’s really difficult to see. It’s laying flat against your crack and blends in with the skin around it. Can you move it?”



Sarah squinted and tried to will her tail into motion. “Anything?”

“No.”

She frowned, more curious than ever. “Can you lift it up?”

“You want me to touch it?” Nate whispered urgently.

“Yeah. Just be gentle. And don’t tell Tim.”

“If you say so.”

Nate’s fingertips touched her lower back and ran down the length of her tail. “It’s soft. I don’t feel any bones. I’m going to try to lift it.” He pushed against the edge of her tail.

“Ouch!” she whispered urgently. “That pinches.”

“Yeah. It’s really stuck.” Nate said, standing up. “As long as we’re doing this, would you mind looking at mine?”

Sarah stood and gestured to the wall. “Be my guest.”

“Thanks,” he muttered, assuming the position. Sarah took one look at his ass, and her heart started racing.

“Well.” She whispered, bending down. “Your asshole is still gone, and it looks like you’re growing a tail of your own.“ She stared at the massive ballsack hanging tightly under his crack. It was smooth and hairless, and she could clearly see the outline of the giant pair of testicles resting inside. They undulated bizarrely, like bundles of snakes, always changing shape. She raised her hand to feel them, but didn’t dare touch.

“Anything else?” Nate asked.

“Your balls are, well, as you know, “ she swallowed, trying to steady her voice. “There’s two of them, and they’re enormous. Tremendous. And they’re moving. They’re alive. Fertile. Wonderful.” She leaned in until her nose was a milimeter away and took a sniff of their musk. Something stirred behind her.

“What did you say?” Nate asked, craning his neck back. Sarah looked up at him, face all but pressed against his sack. They locked eyes and froze.

“My tail!” She exclaimed, leaping to her feet. “It’s moving. Look!” She turned and bent over.

Nate looked, and it was his heart’s turn to race. Sarah’s tail pointed straight at the ceiling. Its underside shimmered with a coat of slimy lubricant, and the source wasn’t a mystery. The orifice that had once been her asshole was sloppy with the stuff. It looked like a cross between a human and a mare’s pussy. It had the long, meaty lips of a mare’s vulva, but the frilly inner labia peering between them were certainly human. Her vulva quivered and flexed, but it didn’t seem capable of fully closing. An especially strong spasm slapped its lips together with a soft clap.

His cock stirred between his legs, and he didn’t need to tear his eyes away from Sarah’s alien snatch to know that it was sliding inch by inch out of his body and into the open air.

“Do that again.” Nate, murmured.

“I’m not doing anything.” Sarah whispered back. “It’s moving on its own. I can’t even stop it.”

The first medial ring of Nate’s cock popped free of his sheath. He stared at her new pussy as another twitch slopped a dollop of lubricant onto the hay below. She might not have been in control of it, but he couldn’t shake the feeling that it wanted something. It wanted him.

The tip of Nate’s penis crept into his vision and broke his trance. This time, his shaft was not dangling limply between his legs. Instead, it stood straight out, pointing directly at Sarah’s new opening, yearning to be inside. His penis flexed with a mind of its own, swaying left and right as if sniffing out its prize. Inch after inch slid out of his sheathe as it stretched closer to its goal. He had no control over its movements. The open air chilled the sensitive skin of his dick, and her pussy was so very warm and inviting.

Just as Nate’s sentient dick was about nuzzle its head between the swollen lips of her altered asshole, he took a step back, pulling it out of range. It strained toward her opening, fully extended. He was conflicted. He knew, intellectually, that he should be terrified, but his libido had grown proportionally with his testicles, and he was so horny it was difficult to think straight. He grabbed his dick and pulled it up to his chest. It struggled against his grip like an anaconda. He stroked his palms up and down its length in an attempt to calm it, but it didn’t work. Still, he continued stroking as he found the touch quite pleasurable.

Sarah glanced behind herself and stared, eyes wide, at the bizarre sight of Nate wrestling both figuratively and literally with his lust. A growing part of her wanted Nate to stop holding his penis back, to step forward and sink it into her empty, yearning depths. Her asshole-turned-pussy twitched in agreement, sending a trickle of cool slime dribbling down her thigh. Nate’s dick jerked against his arms in response. She tried desperately to relax her new opening or lower her tail, but, it was out of her control.

“God Nate, what’s happening to us?” She whispered urgently, standing up and pressing her back against the wall.

“I can’t control It,” Nate groaned, taking another step back and letting go of his penis. It strived futility toward Sarah. “I think it wants you. I’m sorry. I can’t stop it.”

She stared down at the alien entity lusting for her, and her stomach tied itself in an excited knot. “It’s okay. Just stay over there. I don’t want you to get too close with that thing.” She half-lied.

Nate nodded. “I can’t believe this is happening. I want to stay human! I want to keep my free will!”

She paced back and forth and watched Nate’s dick follow her movements like a snake tracking its prey. “It may be too late for the human part,” she remarked, “but we still have our free will. For now.”

“Yeah. My dick has a mind of its own, but I don’t feel. . . compelled to do anything. Well, not really.”

Sarah put her hands on her hips. “Not really?”

“I mean, I still have full control over my actions. . .” Nate blushed, “but I’m really, really horny right now. I know you’re with Tim, and sex should be the last thing on my mind considering the circumstances, but the sight of you, your voice, your smell. . . you’fe sexiest person I’ve ever seen.”

It was Sarah’s turn to blush. “Thanks. I think I understand.”

“You do?”

“I’m feel the same way about you,” she whispered, gazing into his eyes. She shook her head, cleared her throat, and continued. “Let’s just stay on opposite sides of the room and cool down. Okay?”

Nate agreed, and so they each stayed in their respective corners, trying desperately to ignore their incredible, unnatural lust. Long minutes passed. The stall had little to distract them, so they focused on the changes occurring to their own bodies. Sarah watched her legs shift as she paced. Her feet lengthened, and soon she had to walk on their balls like an animal. Her toes shifted and merged until there were only three thick digits on each foot. Her nails grew dark and thickened until she was standing on hard, three-part cloven hooves that clattered on the floor as she paced. Nate’s legs twisted to match her own, like the unnatural result of a horse crossbreeding with a human.

The alien skin continued to spread, cascading down their legs and finalizing their beastial form with a smooth, blue finish. It swept across their stomachs and smoothed out their belly buttons with a pinch. Sarah shuddered as she rubbed her hand against her featureless stomach, her mammalian connection to Earth severed. She was being reborn.

Sarah’s hand brushed against a sensitive spot below her belly. She looked and found two small bumps growing above her groin. They were nipples, complete with bumpy areola. They swelled as she touched them, growing until they were as large as the ones on her chest, though they were much darker in color. She rubbed her finger against one and shivered at the touch. The flesh behind them swelled until she had a petite pair of breasts sitting above her groin. Small enough to hide, perhaps, but large enough to jiggle with each step.

Throughout it all, their lust did not subside. If anything, it was getting worse and worse.

Sarah pressed her ass against the wall, slyly grinding her new quivering pussy against the smooth wood. The touch was refreshing but didn’t offer complete relief. She wanted something more. Nate was distracted examining his hoof, so she reached her hand to probe her opening. Each touch against the altered flesh was heavenly, but still she was unsatisfied. Her fingers were tiny inside of her. She stared at Nate’s member, picturing its solid, arm-sized length thrusting into her.

Nate was in the same boat as Sarah. He tried distancing himself and looking away from his potential mate, but it hardly helped. His cock continued to reach for her, wrapping around his waist if it had to. His tail waved slowly behind him, also completely out of his control. The motion wasn’t just for show; it was smelling the air. His tail was becoming a full-fledged sensory organ, and the strongest scent in the area was Sarah’s. Her musk smelled very unusual, like sweat mixed with bleach. But despite its weirdness, he couldn’t get enough of it.

When he finally turned around, Sarah was fisting herself with her left hand, panting as she pumped rhythmically. She slowed for a moment when she noticed him staring, but soon resumed masturbating, gazing at him with an open mouth and half-lidded eyes. Her behavior wasn’t disturbing. It was liberating. He wrapped both hands around his dick and started stroking. His cock pointed straight at Sarah, beads of pre stringing down from its tip. Each time his fingers brushed one of his medial rings, he huffed in pleasure.

The two watched each other masturbate, trying to douse the inferno of lust that had grown inside of them. It was like trying to put out a forest fire with a bucket of water. Sarah was horny enough that everything else melted away. It hardly mattered that she was growing less and less human by the minute or that her boyfriend’s best friend was stroking himself to the sight of her furiously fisting herself. In fact, she found the situation extremely sexy.

Sarah’s shoulder began to feel stiff. Reaching behind herself was getting less and less comfortable. She tried desperately to keep her hand buried inside herself, but her fist came loose with a slurp as her shoulders popped into a new configuration. Her arms lost a great deal of their range of motion. This didn’t bother her as much as the fact that her sex was now empty. She leaned forward and rubbed her ass against the wall behind her until the wood was saturated with her juices, but it wasn’t the same.

Nate hardly noticed as his shoulders shifted into a more quadruped-friendly position. All that mattered to him was his ability to stroke his dick. It was only when the blue skin crept past his biceps that he started to have trouble. He groaned as his hands cramped, weakening his grip on his member. His thumbs shifted up his forearms, shortening and dwindling until they were nothing but vestigial nubs, and his pinkies soon followed suit. His hands stretched and lengthened as his remaining fingers became thicker, stronger, more suited for supporting the weight of his body. The tips of his fingers fattened as a thick layer of padding swelled beneath his skin.

Nate was upset by the changes in his hands, but only because they made it harder to pleasure himself. His remaining fingers retained some dexterity, but he couldn’t wrap them around his girth anymore, and his new, elongated palms were unsuited for cupping and caressing his shaft. He groaned and bucked his hips, helplessly grinding against his changed hands.

Sarah was too focused on rubbing her ass against the wall to care about the similar changes in her own hands. She did, however, notice Nate’s frustration. It was an opportunity.

“Nate,” she rasped.

“Yes?” he said, still rubbing his dick.

“Come here.”

He paused. “I shouldn’t. I can barely control myself as it is.”

“Are you as horny as I am?” Sarah asked. She took a step toward him, revealing a slick patch on the wall behind her.

“I am, but --”

“So what are we going to do about it?”

“We’re going to, to -- No! We shouldn’t. I want to, but it’s so wrong. What about Tim?”

“Shh! Quiet!” Sarah urged, taking another step toward him. “Who says it’s wrong? Tim and I aren’t the same anymore. But us. . .”

Sarah’s scent grew stronger and more vivid the closer she got. Nate took a step backwards. “Please, Sarah. You’re driving me crazy. I can’t control --”

She took another step toward him. “I want -- no I need your dick. Nate please.” She begged, frowning, eyes helpless and desperate. “Please, Nate.”

Nate’s back was against the wall, but Sarah still approached. “I, I--” he stammered as she reached a changed hand forward and gently touched the head of his dick. It nuzzled her palm, rubbing the sensitive stalks of his glans against her fingers.

Nate gave a shuddering sigh at the electric touch. He stared at Sarah, still conflicted. Her hair was falling out in clumps, as was his own. Soon she was bald, and the pink crest was the only thing remaining atop her head. Her ears twitched and flopped as they stretched into an aquatic fan-shape. Her gaze remained unchanged, troubled by unfulfilled desire.

“What do we have to lose?” She asked, blue skin creeping across her face. She turned around and bent over, sluggy tail flirting up and to the side, presenting her pulsing, alien pussy to him. “Please,” she begged. “Please.”

Nate’s reserve of self control was already nearly empty, and this display was too much. All the reasons not to fuck her were becoming more and more insignificant. She was literally begging for it. His legs trembled with anticipation. She was already one of the hottest girls he’d met, but seeing her bent over, bizarre privates exposed, pleading for his cock was on a whole other level. His dick strained forward, precum dripping steadily from its tip, mingling with Sarah’s lubricant in a small puddle on the ground.

Then Tim’s voice pierced the air. “No! Nate, Sarah, stop!” He was staring wide-eyed over the wall at them.

Nate’s mouth opened to speak, but words failed him.

Sarah looked up at her boyfriend, sobering surprise in her eyes. “Tim! Oh Tim. . . You have no idea how much we need this. We have to.”

Katherine joined Tim, peering over the wall. “Oh my God. What’s happening to you guys?”

Sarah’s grunted as her nostrils flared forward, nose widening and pushing into the start of a muzzle. Nate’s felt a tingling tightness as his skull started to reshape to match.

“I. . . I understand” Tim said, tears in his eyes, “It’s just the aliens controlling your brains again. You can’t help it.”

Sarah’s face contorted as her jaw lengthened and her forehead shrank. She still looked like Sarah, but with increasingly horsey features. Nate looked at her like a mirror, picturing how he might look given the similar changes were warp his own head.

“No, they’re not,” Sarah sputtered through thickening lips. “The aliens aren’t controlling us. I want this. I need this. Nate, please.”

“What!?”

Nate pushed his blunt fingertips against his cock, half-heartedly fending it away from Sarah’s pussy. “I’m sorry, bro. It wants her so bad.”

“Dammit Nate,” cried Tim, ”Don’t do this to her!”

Nate looked back and forth between the pleading eyes of his best friend and the tantalizing sight of Sarah. Her face now looked as equine as it did human, drawn out into a half-muzzle, tipped with a beastial snout and large flaring nostrils. Her lips were larger but still human-shaped, and they mouthed a silent plea to him. Nobody could mistake the pair of blue creatures as human anymore. Why should they be bound by the complicated social obligations of a species they no longer belonged to?

He ran his hand along the plump, smooth curve of Sarah’s ass cheek. Her new skin was perfect, blemishless. His dick strained only inches away from her opening. Her pussy clenched and unclenched needily, radiating an intense heat that traveled down his shaft, directly into his heavy balls. They squirmed unnaturally in preparation for the imminent fucking. Sarah’s new pussy beckoned him by flexing rhythmically, several strands of viscous, natural lube swaying from its leathery lips.



Maybe he should have taken Tim up on that bet after all.

Nate muttered, “I’m sorry,” put his best friend out of his mind, and turned to Sarah.

His dick aimed itself, all he had to do was get close enough to reach her. He pressed its fat, semi-equine head against the, dark, wrinkled skin of her altered sphincter. It relaxed, opening wide to accommodate the girth of his dick’s ridged glans. He grabbed her hips with both hands and pushed forward, sinking his shaft into her warm depths. They both gasped and moaned in pleasure. He pulled out a bit before pushing himself deeper. Her opening stretched taut around each of his medial rings, but there was no shortage of lubricant, and despite his extreme size, her body was built to match.

“No! Stop! Stop! You’re people, not animals! You can choose!” Tim shouted, desperately trying to get through to them.

He was too late. Nate’s reservations had been washed away the moment he entered her, and now he relished the simple, instinctual pleasure of fucking. He could feel his cock squirming and pulsing deep inside of her, rubbing against the nodules and ridges that lined her alien passage. Her pussy gripped at his length, stretching, contracting, and massaging him as it pulled him deeper inside.

As he hilted himself inside of her, he began to appreciate the fact that Sarah’s sexual organ were as autonomous as his own. There was no effort involved in their mating at all, no distractions. All the care and craft of lovemaking was handled by their sentient sexes, leaving them free to thrust and lust and enjoy the ride. Their organs moved with a language of their own, suggesting and accepting, acting and reacting. It was like a perverse french kiss.

Nate spread his legs wider and quickened his thrusts, balls squirming and slapping loudly against the back of his thighs. There was no pain. All he could think about was how wonderful their coupling felt. He loved watching his shaft emerge from her passage each time he pulled back, veins throbbing across its shiny, slickened surface. His dick was simply too long to fully withdraw without stepping backward, but he found a spot where he could both hilt himself within her and pull far enough back to feel his sensitive, swollen glans pressing against the inside of her muscular entrance -- and he could see it too, her lips swelling and stretching around the thickest part of his cock. He fucked her mindlessly, with long, powerful thrusts, and they moaned loudly and freely, lost in the moment.

“Sarah, why?” Tim cried over and over as he watched the beasts that had once been his best friend and the love of his life give in to their lusty instincts.

Sarah turned to look at the source of the commotion, eyes half lidded, tongue lolling.. Her tongue was shrinking, pulling itself into her mouth as it dwindled away. Could she speak without a tongue? A pang of guilt welled up in her stomach, momentarily eclipsing her lust. This might be her last chance to explain herself. She opened her mouth to speak, but she only made it halfway through Tim’s name before Nate thrust into her once again and a loud, pleasured moan forced itself from her throat. She tried again, carefully speaking each word as speech left her.

“Tim,” she labored. “I’m sorry. I needed. . .” Words were coming harder, not just finding them, but speaking them as well. She had to form each word individually, painstakingly. Her tongue was dwindling, voice box changing. “If you were. Like me. You. Would. Understand.”

“I don’t understand!” Tim shouted angrily, “and I’ll never be like you. I’d rather die!”

Tim’s words stung, but she didn’t have time to wallow. She focused hard and formed her last human words.

“Ah. Love. Yoooo.”

She gazed into her boyfriend’s teary eyes for a few seconds then looked away. The damage was done, she told herself, turning her thoughts back to the ecstacy of mating. Besides, she doubted she could stop Nate’s frenzied rut at this point, even if she wanted to. And she did not want to.

She had never experienced such pure lust before. How easy it was to clear her head of all the difficult thoughts and just enjoy the sensation of being filled-- impossibly filled by her mate’s cock. Now unable to speak, she bellowed and lowed in animalistic pleasure.

Katherine had to stand on her tiptoes to see into the other stall. The two creatures on the other side were hardly recognizable as her friends. Watching them fuck felt like an invasion of privacy, but the sight was too bizarre to look away. There was no way Sarah would cheat on Tim, especially at a time like this. Their minds must have been as transformed as the rest of their anatomy.

The sounds of Nate and Sarah’s bodies brushing and slapping against each other filled the air. Their mating was vigorous, but they steadied themselves on their hybrid legs. Nate’s hips and ass were taking on a equine shape as well, cheeks flattening and spreading. Sarah’s seemed even farther along from the occasional glimpses she caught when Nate withdrew his cock especially far. She wondered if Sarah would even be able to stand up when they were done; she looked quite comfortable on all fours.

Tim stopped shouting and collapsed into the simulated hay, defeated. Katherine stayed and watched as her friends’ fucking grew even more energetic. Sarah and Nate’s vocalizations grew deeper and more beastial as their necks thickened and lengthened. She thought they looked somewhat aquatic, with their blue skin, floppy fan-like ears, and wide, fleshy tails.

Finally, Nate pushed his massive, veiny dick as deep into Sarah as he could. He grabbed her hips and pulled, squeezing their bodies as close as possible. His slug-like tail flicked wildly behind him as his hefty balls visibly contracted, and Sarah’s mouth opened in shocked silence as Nate’s sack strained and pumped what Katherine could only assume was at least a gallon of cum into her best friend.

Sarah’s world became her orgasm. Her pussy felt searing hot, but instead of pain, she felt only pleasure. It was a steady, clenching, stream of ecstasy. A steady torrent of Nate’s hot spunk flooded into her and took nearly half a minute to finally die down. She climaxed the whole time, blind to everything around her, including Katherine.

Katherine stared, and when Nate’s balls finally relaxed, they were only a fraction of their original size. Sarah’s stomach bulged like she had just finished a second thanksgiving dinner.

The pair stayed locked together, panting for at least a minute. Then Nate blinked, looked down, and groaned. He withdrew a foot out of Sarah and watched as his dick’s slick length retracted into his sheathe, pulling itself from her depths as it did so. Her tail, which had remained curled up and out of the way while they were fucking, relaxed and rested against his penis. Finally, his blunt head came free with an audible pop, and Sarah’s tail immediately clapped shut over her gaping hole. Not a single drop escaped.

Sarah and Nate stood and covered their privates as well as they could. They stared at the ground, blue faces blushing purple with shame. It was clear that the rutting beasts Katherine had been watching were gone, replaced by her friends, and she suddenly felt like she was intruding. She quickly ducked behind the wall and gave them their privacy.

Sarah couldn’t even look at Nate without thinking about their mating -- for that is what it had been, not lovmaking or sex, but simple, animalistic mating. -- and the sensation of Nate cumming inside of her. Minutes later, her stomach was still descended. Considering how easily she accommodated him, she wondered if she’d been reduced to nothing more than a vessel for a giant vagina and womb. They certainly weren’t human anymore.





She watched Nate for any sign of further changes, but it seemed like their bodies had settled on their current forms. He looked like a cross between a human, a stallion, and some sort of blue alien. They still stood on two legs, but going on four was just as easy.

Without a tongue, Sarah found it difficult to understand what had changed inside her mouth. She approached Nate and opened her maw so he could examine it, and he returned the favor. Their mouths opened surprisingly wide, limited more by their thick, humanoid lips than the range of their jaws. They had no tongue or teeth, just a purple, ribbed throat as deep as she could see.

Suddenly, the far wall of Sarah and Nate’s stall opened up with a sharp hiss, and the stable faded away into the sterile white room. The simulated environment continued on Tim and Katherine’s side, and they dashed to peer over their wall at the commotion.

The six-legged draconian form of Sslsskss’s assistant appeared in the doorway but only long enough to order Nate and Sarah to follow him. Tim called out as they were led away. Sarah turned to look back at him, but she could not disobey the alien’s direct order. The door closed behind them, the stable flickered back into existence, and Tim and Katherine found themselves alone.

.-=o=-.

Tim crumpled into the fetal position and began to cry. The image of his best friend bent over the love of his life, thrusting into her, both of them transformed, both obviously enjoying it, both not caring that he was watching them go at it, played through his mind over and over again. Combined with the rest of the day’s events, it was altogether too much for him to process. He laid there for hours, only eventually stopping because he got thirsty.

He sat up, rubbed his eyes, and made his way to the small trough in their stall, leaning over it and sucking down the water like an animal. Night should have fallen hours ago, but the simulated sun shone just as brightly as ever. Katherine, noticing that he had recovered somewhat, approached him, and they started to talk. She reported that there was no food in their stall, and that the trough seemed to be the only source of water, and it was almost empty.

“I guess they’re just going to let us die then,” Tim sighed. “It’s just as well. I don’t think I want to live anyway. Not after what they did to Nate and Sarah, or after what Nate and Sarah did to each other. . .”

Katherine rolled her eyes. “Don’t be stupid. They don’t want to kill us. We’re obviously a valuable resource. And as for Sarah and Nate, don’t be so hard on them. They were probably being mind controlled by their stupid brain jellyfish, even if they didn’t think so.” She reached over and tapped the ridge on Tim’s head, sending a jolt down his spine.

“Ow!” he yelped, rubbing the strange protrusion. “I forgot about those. Maybe there’s hope for them. . .” He groaned and collapsed back onto the ground. “Who am I kidding? There’s no hope for any of us.”

“I wouldn’t be so sure about that,” Katherine said, a smile creeping across her lips. She crawled over to her side of the stall, retrieved something from a pile of straw, and brought it back to Tim. It was a narrow, silver rod.

“A probe!” Tim whispered urgently. “How did you get that?”

“I saw it laying next to Nate, so I hid it. The Doctor’s stupid assistant forgot to collect it.” She handed it to Tim.



“Hid it?” Tim asked, running a finger down its length. “Where? The room was completely empty.”

“I’d rather not say.”

“Oh gross!” He dropped the device like it was a hot coal.

“Grow up,” she scolded, snatching the probe from the floor. “While you were balling your eyes out, I’ve been learning how to work this thing. Look.” She flicked the probe like a wand and a shimmering forcefield appeared around Tim. Just as he was beginning to feel claustrophobic, she flicked the probe again and it was gone.

“That’s amazing! How did you learn how to use it?”

“I found a voice interface on it. It’s in their language, of course, but that’s no problem thanks to these things.” She pointed to her fleshy pink ridge.

Tim’s face lit up. “Can we escape?”

“That’s the plan. I’m going to wait until they open the door again. Then we can make a break for it. There have to be escape pods on this ship.”

“But what if they don’t open the door? We have to rescue Sarah and Nate before it’s too late!”

“Too late?” Katherine scoffed, furrowing her brow. “Maybe that brain slug is affecting your intelligence more than mine. It’s already too late. They’re mutant alien experiments now. We don’t even know if they’ll survive their modifications under the care of the aliens, let alone back on Earth. ”

Tim tried to figure out some hole in Katherine’s logic, but he didn’t know where to start. He shook his head. “You might be right, but I can’t just leave them. Who knows what those aliens are doing to them?”

“Probably caring for them, whatever that entails. Sarah and Nate would want us to escape, even if it means leaving them behind. I know it.”

“Maybe,” Tim muttered, staring back into the empty stall. “I hope they’re okay.”

.-=o=-.

Nate staggered next to Sarah on unfamiliar hooves, following the aliens down a silvery hallway. It was well-illuminated, though she couldn’t find a light source. The floor was dark and squishy like a rubber mat. They passed glowing control panels, silvery doors, and other aliens of various shades and sizes. Some turned to watch the odd creatures being paraded past them with moderate interest.

Sarah was humiliated by the exposure. Even if it was just a bunch of aliens watching, a lifetime of social conditioning screamed at her to cover up or hide as the aliens ogled her bare ass and breasts that bounced with every step. She glanced over to Nate and saw his cheeks blushing a deep purple. At least she wasn’t alone in all this.

The apprentice complained as they walked.

“You’re telling me I have to speak to them? Like they’re intelligent?” He whined.

“Yes,” sighed Sslsskss “Social conditioning requires social interaction.”

“Sss. . . This is absurd, explaining to livestock what it means to be livestock. Next you will want me to tell my bed that it is for sleeping.”

They turned and passed into a large, open room with a high ceiling. The far wall was completely open to space, staring out into an infinite field of stars. There must have been a forcefield preventing the room from depressurizing. More displays and control panels dotted the walls here, as well as other doors. The space was mostly empty, save a few stacks of hexagonal containers here and there. It was a cargo bay.

The doctor made a gesture with his probe and a large yellow circle appeared on the floor in the center of the room. He turned to the humans. “Go stand inside that circle. You are to remain there until we tell you otherwise.” They obeyed.

Sslsskss waved his probe at Sarah and then Nate. “I still have no idea why there are such large buildups of adipose tissue on the female’s chest and groin. Nevertheless, she has been successfully impregnated. She will be ready to give birth in three days. That is just enough time for you to complete the domestication.”

Nate’s stomach did a flip. Did he say pregnant? He hadn’t even considered the possibility. No wonder the aliens made them so hyper-sexual. They were being bred like farm animals, and Sarah’s first due date was only three days away!

“Three days? This is a waste of time,” the apprentice complained again. “The t’tssk already ensure their loyalty.”

“They follow simple, direct orders, yes, but they are not loyal. Without a handler, they will resist their instincts, even become violent. After domestication they will be free to roam the ship without oversight.”

Nate didn’t like the sound of “domestication,” but his ears perked up at the mention of freedom.

“Pst!” spat the apprentice. “Violent? You fear these toothless, clawless animals? Pathetic.”

The doctor spun around and wrapped his hands around Klkss’s neck before he could react. “That is enough! You are one mistake away from being recycled. You will perform the procedure, and if I return to find your work unsatisfactory, there will be dire consequences.”

“As you command,” he choked. With that, the doctor released his apprentice, dropped to all six legs, and scurried out of the room hissing angrily to himself. Klkss rubbed his neck and glared at the creatures in the circle.

Nate’s legs shivered in fear as he imagined what cruel horrors domestication entailed, but he wasn’t entirely hopeless. Klkss seemed thoroughly overconfident. If he played along, maybe the apprentice would lower his guard and give him an opening to turn the tables.

“That guy is a pain,” Klkss said to the humans. “You wouldn’t hurt me, would you?”

The alien stood on four legs and slowly walked into the yellow circle. Sarah immediately bolted to the far side of the circle and cowered. Nate considered attacking him right then, but there was no way he’d win a fair fight. Besides, he didn’t want to play his hand too soon.

“That’s what I thought.” The alien said, smiling a fanged grin. He stepped his lower half closer to Nate and bent his tail until the phallic tip hovered in front of his face. Its fleshy tip glistened with moisture. “Hungry?” Klkss asked, pulling back his tail’s scaled foreskin and pushing it up to Nate’s muzzle. It smelled sweet, like maple syrup, but it still disgusted Nate. He pulled his head away.

“Hmm. I suppose there is work to do after all,” the apprentice said, disappointed. He stepped out of the circle and summoned small, semi-transparent holo-display. “Let’s get this over with. You two will listen to what I have to say. It will all be true. Understand that it’s the truth and accept that it’s the truth.”

He cleared his throat and began his speech.

“Hello, new livestock.” He read, monotonously. “Welcome to Scout Ship fifty-seven of the Vesk Dominion: your new home. You are probably afraid and disoriented right now, but do not worry. You will live a long, happy, and productive life aboard this ship.”

Nate was slightly reassured. At least they didn’t plan on torturing or killing them.

“I have chosen new designations for you.” He turned to Sarah. “You will be called Ksaa.” Then he pointed to Nate. “And you will be Lissk. You will both forget any previous designations. Your new names are Ksaa and Lissk.”

Sarah huffed in disapproval at her new name, and Nate agreed. Like hell he was going to let these bastard aliens rename him.

“All living things aboard this ship are expected to contribute to its well-being. This means becoming a part of our unique ecosystem. Instead of waste, your body now produces various useful byproducts. All you need to do to fulfill your purpose is to live comfortably and follow your instincts.

“The only creatures on this ship that consume what you might think of as ‘normal’ food are us Vesk. We are responsible for converting that raw material into the potent fuel that the rest of the ecosystem relies on. That fuel is excreted from our tails,” he said, waving his obscene tail tip toward them, “and it is the only food your bodies will accept. Luckily for you, there are plenty of Vesk aboard this ship, and we are currently very short on livestock. You’ll never go hungry.”

Sarah and Nate looked at each other, eyes wide, then back to Klkss. Nate was hungry, but the thought of sucking his meal from the aliens’ dick-like tails made him sick.

The apprentice continued reading, and the earthlings had to listen. As the minutes turned to hours, his bored, monotonous voice took on a hypnotic quality. At first he tried to resist, but he didn’t have the mental capacity to both listen to his words and refute the logic in them. Eventually, he relaxed, cleared his mind, and let the vesk’s perverse sermon seep into his brain, teaching him that he was nothing more than an animal, that all he needed to do was eat and breed, that happiness would come from being the lowliest member of the ship’s ecosystem. The alien had his complete, undivided attention.

“Hungry yet?” Klkss asked, bending his body into a U shape and sticking his tail into the circle.

The sudden shift in tone woke the livestock from his trance, his mind going blank before his own thoughts slowly returned. He looked up at the tail and was relieved to still find it repulsive, backing up as if it was drooling acid instead of the only food their new alien bodies could handle.

“There’s no point in denying yourselves.” The apprentice reasoned. “I’ll order you to eat long before you starve to death.”

Nate’s stomach growled loudly. He would have to eat eventually, and this seemed like a good way to lull the alien to lower his guard. He swallowed and stepped forward. The base of the apprentice’s tail was swollen and fat, but the last couple feet were relatively slender. Soon his nose was close enough to smell the syrupy scent of the tail’s juices. His mouth reflexively began to produce an abundance of saliva.

“That’s it, Lissk. Open up,” coaxed the alien, speaking in a, overly sweet, nurturing voice. His name wasn’t even Lissk. It was. . . Nate. He was Nate.

Nate closed his eyes, told himself it wouldn’t be that bad, and opened his mouth. Before he could change his mind, the slick head of the tail pushed itself past his lips. A brief jet of fluid immediately hit the back of his throat, filling his mouth with a strong taste similar to molasses. His lips pursed around the invading organ, ensuring that not a single drop spilled.

The apprentice hissed in relief as Nate fed. “Aaahhh. Finally. The machines are a poor substitute for real livestock.” The fleshy, scaly tail pushed deep into his throat, but it was not uncomfortable. He found that he had no gag reflex, nor any trouble breathing. In fact, the sensation was very pleasurable, like a mixture between receiving a massage and eating a good meal. Klkss began to piston his tail in and out, each stroke releasing a spurt of syrupy sustenance into Nate’s increasingly eager mouth.

“Yesss. That’s enough for now, have to save some for your mate, Ksaa.” Klkss said, pulling his tail loose with a slurp. “It felt good didn’t it? Your body’s pleasure centers have been perfectly aligned to your purpose. If something feels bad, don’t do it. If it feels good, do it. That’s as much thought as you need to put into your decisions from now on.”

Nate smiled at the thought. No more suffering through a painful workout to build muscle mass or forcing himself to eat disgusting spinach to stay healthy. He looked back to Sarah, expecting her to be delighted at the news, but the terrified look on her face snapped him out of it. He approached her slowly in an attempt to calm her down, but she backed away as though he’d lost his mind.

“How about you, Ksaa? It’s important to stay nourished during your pregnancy.”

Sarah’s fearful eyes glanced rapidly between Nate and the tail, and she sidled along the edge of the circle, staying as far from both of them as she could manage.

“Very well. I suppose you can wait until I return,” Klkss said, stepping out of the circle and tapping on his holo-panel. The yellow circle on the ground expanded quite a bit, growing to be at least twice as large as their stall was. “This is a reward to being such good listeners today. At this rate you’ll be free to roam the ship in no time.” Then Klkss dropped to all six legs and scurried out the door, leaving the two alone inside the cargo bay.

The new, larger circle contained a few storage containers and even a console with a control panel on it. Nate quickly clopped over to the controls and tried to work them, but they didn’t react to his touch. The containers were also impossible to open, so he quickly gave up and went back to standing around, waiting. He stared out the cargo door into the infinite field of slowly shifting stars and wondered if one of the distant points of light was their sun.

Nate’s penis wriggled briefly inside of his sheath like it was trying to find a comfortable position. He could feel the motion deep inside his stomach, and it sent shivers up his neck. This wasn’t the first time it had moved since he and Sarah mated. Occasionally, it waved the few exposed inches of its head from side to side like it was looking at the scenery. His tail was where most of the action was. It fluttered lazily through the air behind him, taking in the scents of the area. It had been growing steadily and was now long enough that it occasionally brushed to top of his ballsack. His scrotum had been smaller since he climaxed, but as Nate paced around the cargo bay, it began to swell. It started suddenly with a tingling sensation. He couldn’t see it, but he could feel his testicles hanging heavier, swinging more as he walked, resting lower against his thigh. He supposed that extra food had to go somewhere now that he didn’t need to poop or pee.

Sarah kept her distance at first, but, as the long minutes passed, she relaxed and approached him. He wished he could tell her his plan, but he could only grunt like an animal. He looked into her eyes and touched her shoulder, and she returned the gesture.

Their bodies continued to change, and soon standing on all fours was far more comfortable than balancing on their hind legs. They stood side-by-side and took comfort in the touch of his partner. Sarah’s belly had expanded since they left the others behind. Now it brushed against his flank when they stood together, and he could feel the occasional movement within, movement, he realized, of his children. He was going to be a father.

Despite the circumstances of the pregnancy, he was proud, both of Sarah and himself. He looked at his strange mate, her half-equine face, her hanging breasts, her stubby fingers, and he found her beautiful. He worried about her refusal to eat, about the stress she’d been through, and about the mental conditioning she’d been subjected to, and soon would be again. He found himself caring deeply for the pregnant alien beast standing next to him, perhaps more than he had for any woman back on earth.

Sarah and Nate laid down together and drifted off to sleep, awaking several times to various unfamiliar Vesk coming and going. They didn’t fear the newcomers. They were all part of the ship’s family, after all, and they knew the aliens would never hurt them.

.-=o=-.





Sarah awoke with a start as something jolted inside her belly. In her dreams, she was a human, but memories of the previous day quickly flooded back to her. Yes, she had been transformed into a monster and bred. Her stomach was larger than it had been when she went to sleep. She was showing.

She stood as she wondered what was growing inside her. Was it human or alien? How big would she get? How many would there be? Would she have to raise them? She supposed all these questions would be answered eventually, but she wanted to know now.

She glanced over to her partner, Lissk. The long sleep left her refreshed and invigorated but starving. If he had been as hungry yesterday as she was now, she understood why he willingly sucked on the alien’s tail. She was glad he spent the night with her. It was comforting to have someone who understood what she was going through by her side.

If only she could speak to him and tell him how much she appreciated his presence. She leaned in and gently kissed his chee. Lissk turned to her and looked her in the eyes, his large human-shaped lips hinting a smile. He moved in and kissed her right on the mouth. Sarah was surprised, but returned the gesture. Butterflies fluttered in her belly alongside the new life that was growing there. His lips tasted sweet and savory, a bit like bacon and maple syrup. She re-engaged the kiss, prolonging it in order to slurp the flavor off of his lips. It was only after she pulled her head back that she realized she had been tasting the remnants of Klkss’s tail juices. Without a tongue to lick his mouth clean, it must have just sat there. They were certainly clean now. She felt a little sick to her stomach at the thought, partially because of what she’d tasted, but mostly because she had enjoyed the flavor so much.

Klkss arrived soon after and once again offered his tail to the pair. Lissk didn’t hesitate this time. He pranced over on all fours, balls slapping against his legs as he went, and let the lizard face-fuck him. Klkss pushed his tail so deep, his throat bulged. Eventually, he withdrew his tail, and Lissk headed back to Sarah avoiding eye contact the entire way.

“Ready to eat yet, Ksaa?” asked the apprentice. Ksaa. He waved his tail enticingly, the last foot and a half glistening with Lissk’s slobber.

Sarah looked away. She was starving. The urge to eat was almost as strong as her urge to fuck Lissk had been yesterday, but she refused to be degraded any more. She refused to embrace the new life the aliens were forcing on her, even if it meant starving herself.

“Very well,” the apprentice sighed, “but the bioslugs growing inside of you are almost mature. It’s not healthy to give birth on an empty stomach.”

Sarah felt sick. Bioslugs? That’s what she was pregnant with? The movement in her swollen stomach wasn’t a human child kicking or even another livestock creature like herself. They were those horrible slugs, writhing and wriggling, just waiting for her to birth them so they could push themselves into some other poor soul. She would be responsible for creating the creatures that would steal the identities of others, mutating and subjecting them to the vesk.

She wanted to cry, but Klkss brought up the holo panel again and started the session. He read with the same bored monotony as the day before, his words hypnotically worming their way into her mind. “All of your problems and stress live in the past or the future,” he read. “Instead, focus on the present moment, the here and now. What’s happened is done, and the vesk will take care of all the difficult planning. Live in this moment. Find pleasure in now.”

Sarah resisted the words at first, as she had done yesterday, but soon her mental defenses were exhausted. It became difficult to tell where his words stopped and her own thoughts began. She thought of all the things she loved, her home back on Earth, her family, Tim, fucking Tim, Lissk, mating with Lissk. No that wasn’t right. She was a human, a student, a cheerleader, an attractive young woman, size 4, 32DD, four breasts, swollen belly, eager breeding stock.

When the vesk finally finished his lecture, Ksaa hardly noticed. Not a single original thought popped into her head until he curled his tail toward her. She was starving, but she knew there was a reason she wasn’t eating. What was it? It had something to do with when she was a human, but it was tiring to think back that far. At this moment she was hungry, and there was a vesk that needed her help almost as much as she needed his. It was symbiosis.

She leaned forward and pushed the dripping, phallic tip of the tail against her lips. It easily slid to the back of her mouth and deeper, her jaw stretching to accept more of its length. She swallowed and swallowed, throat reflexively massaging the length, coaxing the sweet nectar into her stomach to feed her young.

As she fed, she awoke from her trance, and she realized what she was doing. She stared down the slick, pumping length of scaly tail, and anxiety raised within her. But it felt so good, and things that felt good were safe. That’s what the vesk had told her. She relaxed and enjoyed the flavor.

“Yesss. The Veterinarian will be pleased by your progress, Ksaa,” the vesk said, pulling his tail free from her eager lips and plunging it into Lissk’s waiting mouth. He hissed with relief as her mate sucked him dry.

Soon after feeding, she felt a bubbly effervescence in her breasts and udders. She looked between her forelegs and was greeted with the sight of her breasts hanging in front of a dramatically swollen belly. Its skin was a lighter blue, almost white from stretching, and it had grown so large that she couldn’t even see her udders beyond its curve. She could feel them, though, the weight of them hanging from her inner thighs, and they were growing heavier by the second. Soon their burgeoning flesh crested into her view. Her nipples grew to match, puffing up and lengthening until they were larger than the thumbs she’d lost.

Klkss noticed the growth, and leaned down between her legs to get a closer look. “It seems your metabolism is directing a large amount of resources toward these strange, fatty organs. Very curious.” He reached out and touched one of her lower breasts with the cold tip of a probe, then with his rough, scaly fingertips. He wrapped his claws gently around her teat, and the touch sent pleasurable tickles up into her stomach. Klkss tugged her teat, and a stream of white milk sprayed his face.

“Gah! What!?” he started, spitting and sputtering. He raised the probe to his mouth and relaxed a bit. “Water, protein, fat. . . This is food?” He looked down at Ksaa’s breasts like he had just discovered a new species. “Fascinating. And delicious.” He licked his lips and tugged the teats of Ksaa’s udders once again, this time aiming for his open mouth. Her eyes rolled into the back of her head from the pleasurable release.

“This is very unexpected, but I think Sslsskss will be pleased. I’ve never tasted anything so good! Well done, Ksaa.”

Ksaa felt a pang of pride at the words but knew that she shouldn’t. This all felt so wrong. While she tried to make sense of the odd feelings, Klkss circled out of sight and returned with one of the egg-shaped bioslug containers.

“Now Ksaa, when you feel the urge to give birth, find this container and then induce labor. You should have some level of control over when exactly the process begins, so try to wait until you’re standing near this. We don’t want to leave a mess, do we?

“You have been very good today. I am taking away your circle, but you must stay here in the cargo bay until I am finished with your final session.”

The yellow faded away, and their vesk mentor took his leave. Ksaa was eager to explore the new space now that she had eaten. The livestock cleaned each other’s lips with a sloppy kiss, then moved as a pair, sniffing and examining everything in the cargo bay. They found nothing of interest, and ended up standing by the cargo bay door, staring into the endless ocean of stars. Ksaa wondered how many were out there, and likewise how many Bioslugs were inside of her. She tried to count her “children” from their movements, but it was impossible.

Ksaa noticed Lissk staring at her, but when she turned to him, he glanced away. He’d undergone his own post-meal growth spurt, and his balls were as large as they had been when he impregnated her. It was her turn to stare, gazing at the magnificent orbs resting between his legs, so plump and virile, so overtly masculine. She knew he had no choice in the matter, but it seemed there was a confidence to his nudity. And as she stared, she felt a movement behind her.

Ksaa had almost forgotten about the sentience of her backside. Unlike Lissk, her tail hadn’t moved since their mating, but now her thoughts had awoken it. She faced Lissk again, hoping to hide the fact that her tail was slowly lifting up, curling to the side, exposing her permanently sloppy vulva to the cold air.

Lissk wasn’t even looking her direction, but his cock dropped from its sheath all the same. He glanced between his legs, surprised at the sudden movement, and then over to Ksaa. Her fan-like ears flushed with heat as her heartbeat quickened. He knew.

This time they didn’t shy away from their instincts. They arranged themselves like two dogs saying hello. Nate walked past her head and stuck his face under her tail, heavy breaths from his huge nostrils huffing life into her alien pussy, causing it to twitch and stir. She mirrored his position, pressing her cheek against his smooth, pulsing sack. Peeking between his legs, she watched his second medial ring push free of his sheathe as the veiny length of his cock snaked toward the floor.

Lissk pushed his mouth against her pussy, stroking and nibbling at her opening with his large, muscular lips. Her rear lips contorted and pursed, returning his kiss almost as dexterously. Each squeeze shivers up her neck and down her tail, but she was starting to feel jealous of her rear end. Why should her sentient pussy get him all to itself?

She felt something brush against her breasts and looked to find his length nosing toward her stomach. She smiled and craned her neck down between Lissk’s legs. His cock’s blunt head waved in the air, trio of stalks bending, searching. She opened her lips, mesmerized by the bizarre sight., and It surged toward her mouth. She didn’t move to dodge it, instead opening her mouth wide to accept its swollen, crested head past her lips. It pushed its way as deep as it could reach, past her jaw and into her throat. Her body took its massive size without issue, and she closed her lips around shaft and began to work her neck back and forth, just as she’d done at dinner earlier. His spicy and salty precum tasted very different from the sugary syrup of the vesk’s tail, but she enjoyed it all the same.

Finally, Lissk took a step back, pulling his dick from her eager lips and positioning his body behind her. He crawled onto her back, and his cock’s ridged head pressed its way into her eager pussy.

Her body, she thought as Lissk’s thrusting fell into a steady rhythm, was hardly her own anymore. She shared it with the parasite that had taken control of her rear end, her children were living inside of it, the vesk drained their tails with it, and Lissk was sating his lust with it. She gasped as he thrust a few inches deeper, her lower breasts slapping lightly against her stomach. It felt good to be useful, to be desired, to be together. Her passage clenched around his shaft as her first climax of the session took her. Lissk bellowed an alien moan and kissed her neck, his thrusts not slowing. Ksaa was awash with pleasure. Even the squirming of the nascent bioslugs in her belly sent little jolts worming through her innards. She wished it would never end.

Lissk gripped her waist and pushed his shaft so deep inside of her that she could feel her pussy lips making out with his sheathe. She clenched her eyes as another orgasm took her, and the cock inside of her stiffened and swelled. Lissk’s cum surged into her already occupied womb as h