Glenn sat back on the couch, idly flicking through channels. It was a Saturday, and he’d had a tough week – work had been intense, and there was nothing more he wanted than to hang out with his girlfriend Mia and chill the hell out.

He clicked through what seemed like hundreds of channels, his hand almost automatically switching from one banal scene to the next. When did TV get so terrible? He just wanted something great to watch. Was that so much to ask?

Just at that moment, he heard the chime of the doorbell, and made to get up.

“I’ve got it!” Called Mia, walking past the door to the TV room. Glenn got a brief glance at her auburn hair and slim body before she disappeared. He already felt a little bit hard imagining her and her tight butt climbing over him and riding his cock. Glenn was really into Mia, and the feeling was very much mutual. They both worked really hard during the week, and when they got together, their release was explosive. Glenn’s jeans started to tighten.

“What is it, hun?” Glenn called, still seated on the couch. They didn’t tend to get much post these days, and any they did was bills or crappy offers that no one could possibly care about, let alone understand how the senders even knew their address.

Mia entered the room, frowning at the package in her hands. The slight wrinkles of confusion on her dark-skinned face made Glenn’s heart melt. She flicked her gaze up to him, noticing his grin, and smiled, her thick, crimson lips parting in a broad grin.

“Hey big boy, how you doing?”

Mia’s eyes were the most beautiful part about her – they were a striking gold, apparently due to an overabundance of some pigment. Where most people would have amber, Mia had gold, and it suited her stunning appearance to a tee. She often wore large, gold hoop earrings to match up, and it was one of the things people most commented on when they first saw her. That and how hot she was, of course.

“All the better for seeing you, darlin’. What’s the in the box?”

Mia placed the small, brown paper parcel on the low glass table in front of the couch and sat down next to Glenn, kissing him on the cheek. She began tying her auburn hair back in a French ponytail. Glenn sneaked a look at her small, B-cup breasts rising up and down beneath her tight white vest top as she breathed.

“How about you look less at my tits and more about what’s in the package?” Mia laughed, finishing the tie and squeezing Glenn’s leg with a knowing wink.

“How about you look less at my package”, Glenn muttered, not really making any sense, but wanting a comeback of sorts. It had sounded better in his head. He picked up the package, turning it over in his hands. It was a long, fairly flat rectangle. Maybe someone had sent him a book? Glenn snorted at the thought. He hadn’t read a book in years. He was a Kindle man, through and through.

“Can I open it?” Mia asked, a wide smile spread across her handsome face. Her lips were full, and her eyes were sparkling gold. Glenn knew the signs: she was excited.

“Sure.” He gestured with his hand, and Mia clapped hers together in delight, grabbing the parcel from the table and appraising it with a keen eye.

“Oooh, it’s light. And there’s no label. What could it mean?! Maybe it’s a bomb!” She grinned with an expression that suggested she didn’t quite believe this to be true, and began tearing off the brown paper.

Glenn leaned forward from the couch unable to resist the pull of Mia’s infectious excitement, and observed with a gently open mouth the look on Mia’s face as she pulled from the brown paper a small rectangular box. It had a lid that slid off vertically like a shoebox, and the whole thing was a deep maroon colour, almost velvety. It looked expensive. On top in white was a logo that looked to be a pair of cow horns.

Glenn raised an eyebrow. This was all very strange.

“It must have been sent to the wrong address.” He said, looking at the bizarre package.

“The Fed-Ex guy who delivered it read our address out. He even mentioned me by name.” Mia replied, turning the box over in her hands. The base was the same material as the top half, but without any adornments.

“Well, it doesn’t seem to be a bomb. Wanna open it?” Glenn suggested.

Mia was already leaning forwards, gently lifting off the velvety, maroon lid of the box. She placed it to the side of the box, and peered down.

“Oh! Oh. Well, that was underwhelming.”

Glenn leant forward, eager to see what all the fuss (and then subsequent lack of fuss) was about. In her hands, Mia was holding a small black hairband with the same little cow horns sitting in the middle of it. Something very strange was going on.

“This is weird”, Glenn said, looking at the strange item, but before he could say anything else, Mia had shrugged, and slipped it over her head, pulling her auburn hair back and looking like she had tiny little horns. It was cute.

“Meh, I’ve had weirder gifts.” She said, settling back in the couch and looking at Glenn. “How do I look, lover boy?”

Glenn didn’t really know what to say – cow horns were a rather strange addition to her outfit, but they didn’t look terrible. Just…different. Plus they were pretty small and didn’t really affect how hot she was.

Glenn went to flick on the TV to go back to his prolonged quest for something half-decent to watch, but out of the corner of his eye, he saw movement. Mia was wriggling on the couch, a little.

“You ok, hun?” Glenn asked, looking over at his squirming girlfriend.

“Yeah, I just…don’t you feel that?” Mia asked, not quite looking at Glenn, starting to rub her body up and down. She was wearing little hot pants and her usual Saturday morning white strappy top, and she was looking at herself and at Glenn with a strange expression on her face.

“Feel what?” Glenn replied, for the first time this morning starting to feel a little alarmed by the whole thing.

Mia was writhing in her seat now, rubbing her legs up and down, stroking her arms, biting her lower lip and even brushing her hair and neck. Her hairband didn’t move an inch.

“Everything’s so fucking…good.” Mia grinned, with slightly gritted teeth. Glenn knew this face. She was turned on. She was really freakin’ turned on. This expression happened when they were fucking and she was just about to come.

Mia was rubbing the inside of her slim thighs now, her hands moving up and up towards her cunt.

“God I’m wet, Glenn – I am so turned on! I think I’m…I think I’m gonna…ohhhhhhh.”

Glenn sat on the couch, watching his beautiful girlfriend go through paroxysms of pleasure in front of his eyes, and he wasn’t sure whether the whole thing was amazing or horrifying – maybe it was both. Mia was rubbing her entire body up and down, playing with her breasts, rubbing her legs, moving her hands over her shorts, and then she moved close to her clit, and BAM.

“FUUUUUUUUUUCCCCCK!” Mai came like a wild animal. Pleasure rocketed through her, and she bellowed with pleasure on the couch, bucking and kicking as her body pulsed with arousal. She twitched back and forth, quivering with post-orgasm joy, looking over at Glenn with a delighted look in her eyes.

“Babe, are you alright?” Asked Glenn, leaning across to try and comfort his girlfriend. She looked better than alright, but also something very strange and potentially terrifying was happening to her, and Glenn wanted to make sure she was ok.

As he reached his hand forward to touch her, Mia looked right into Glenn’s eyes, hers sparkling, and got to her feet. Quick as a flash, she moved the glass table out of the way, and stood in front of the TV, swaying on her feet slightly.

“You’re gonna enjoy this.” She smiled, and began to dance.

Glenn was dumbfounded. What on earth was going on, and what had happened to his Saturday?! He found himself not caring, unable to tear his eyes off his beautiful girlfriend, ready for anything to happen.

He was not prepared for what did.

Mia was always a good dancer, and they often went out to clubs where she strutted her stuff, but this was something different. Something…primal. Mia danced like a woman possessed, and every move she made was sensual and purposeful and chaotic all at the same time. Glenn found he became hard almost immediately.

“I’m going to dance for you, and I’m going to become your perfect fantasy” Mia groaned, raising her hands above her head and shaking her entire body. “I’m going to become everything you’ve ever wanted.”

Glenn opened his mouth to speak, but somehow he knew she wouldn’t be able to hear him. She was running the show now – or whatever was on her head was. Glenn knew things were about to get even weirder.

And then Mia turned, and raised her ass in the air. She raised her hands above her head, dancing to a rhythm only she could hear, and slowly began gyrating her hips. Back and forth, back and forth. Glenn couldn’t take his eyes off them. In those little shorts, her butt looked absolutely incredible, and the more she moved it, the more he wanted to bury his face in it.

She moved so quickly, it was almost as if her ass was growing – the more it shifted and jiggled, the tighter her shorts looked as her ass gyrated within them. Glenn’s erection grew harder as he looked at his girlfriend’s perfect ass.

And then he saw the stretching of the fabric and Glenn saw what was happening. He couldn’t believe it, but he saw it. As Mia shook her hips and gyrated back and forth, she started to grow. It was gradual, but hypnotic, and somehow inevitable. Glenn had no idea what was going on, but his girlfriend was slowing growing, bigger and wider.

Slowly but surely, her shorts began to stretch as her hips grew wider and wider. Inch by inch, they stretched, and her thighs grew to match. Initially her slim form had allowed for a thigh gap of almost an inch between her slender legs, but as her hips grew, so did her thighs, swelling bigger and thicker with each gyration she made. Glenn’s eyes grew wide as his girlfriend swelled in front of him.

He watched her thighs as they grew larger and larger. In her little shorts, which were becoming increasingly tight as her legs thickened, he could see the whole luscious flanks of her legs, powerful and toned, and couldn’t help opening his mouth in amazement as her thighs thickened. The inch gap closed more and more quickly, and soon even though he legs were a little way apart, their growing bulk pushed them together.

And if Mia’s thighs were growing, and would soon rub together whenever she walked, her hips were even more incredible. Mia had always had a slender waist, and the dance she was doing didn’t seem to affect that in any way. Her white vest top clung to her svelte figure and looked stunning, even being accentuated by the changes that were going on below.

But her hips were growing. The more she danced, the more she focused on the movement and the gyrations, the more her hips grew. Glenn could see her shorts stretching over her hips as they grew wider and wider, expanding inch by inch, giving her figure a very bottom heavy appearance. Her shorts were tightening over her bulging frame, and Glenn was worried they were going to burst off at this rate, her thighs and hips were getting so large and expansive. Mia was becoming more and more pear-shaped.

But then, just as Glenn thought Mia’s hips couldn’t get any wider, as they swelled another few inches and looked like they were almost double her slim, 30’ waist, her bulging thighs rubbing against one another, Mia turned around, golden eyes piercing and stark, and began to twerk.

If Glenn hadn’t already been turned on, this would have been the moment where he became obsessed. Mia had always had a great butt, but it was petite and tight, as opposed to big and fleshy. But now, as she hopped across the carpet of his living room towards him, her butt cheeks shaking as the rest of her body stood still, Glenn could see with heart-pounding arousal that Mia’s butt was starting to expand.

It was too much. She’d already grown so much, but as Glenn watched her cheeks slowly inflate as they jiggled and shook, he realised how aroused he was by the prospect of Mia with a bigger ass. He’d always thought of her as perfect, and that there was no way to improve upon her – no way that was physically possible, that was – but now it seemed there was every way, and here it was. All it took was an anonymous box from a complete stranger.

By now, Mia had twerked her way right up to Glenn, and was shaking her beautiful ass in his face. And from such close proximity, Glenn could see it growing. He could see the hot pink tip of her thong riding up from above the rim of her shorts, which were already stretched and warped from the intense growth of her thighs and hips. Now her ass was following suit, and as her cheeks shook and wobbled in front of his eyes, he could see them expanding too.

The growth was slow at first, but soon it was like two large, fleshy balloons were being inflated right in front of his eyes. They were pumping up, larger and larger, and what was initially just gentle rippling as Mia twerked, was now replaced with large, fat, wobbling and shaking, as Mia’s butt bounced and jiggled beneath its increasingly stretched prison. Mia’s shorts looked practically painted on now, and the larger her ass cheeks grew, the more comical her shorts looked. Her butt was so big, Glenn was starting to see tears in the fabric, as her cheeks still swelled larger and larger. Her butt was so close to his cock, and he longed for his dick to be buried between those beautiful buns. But the show had to go on. He knew that.

So as Mia shook her ass, and it grew to ever larger proportions, and her shorts started to tear apart, not only because of her massive butt, but because of her huge hips and swollen thighs, Glenn stared on, more turned on than he’d ever been in his life, and unbelievably anxious to see where things went next.

He didn’t have to wait long to find out.

Glenn stared up at Mia, as she turned her huge ass, thighs and hips away from him. It was incredible to look at her huge new form, stuffed into those tiny shorts, as she sashayed towards the TV. Her entire bottom half seemed too big for her top, and her shorts were starting to tear as she bulged across the impromptu dance floor.

As much as Glenn enjoyed – was almost impossibly delighted by – the expansion of Mia’s bottom half, he had always at heart been a breast man. Which was why he felt a peculiar burst of arousal when she turned back to him, and began bouncing her chest. Glenn had seen enough to know what this meant. And he couldn’t wait.

Mia was sweating heavily now, and rivulets of moisture poured down her face, causing her auburn hair to stick to her face a little, but still she danced. Harder than ever before. The small cow horn hairband that had start all of this rested snugly on her head, never moving an inch, no matter how frantic its wearer became.

And Mia moved forward towards Glenn once more, her thick thighs rubbing together, her impossibly wide hips sashaying crazily in the morning light. And Mia began to bounce her breasts.

She was wearing a bra, a padded, pink number to match her thong which did a great job with her 32B breasts, giving them a solid size and heft despite their modest scale. But now, as much as her bra was trying to restrict their bouncing, it couldn’t hold off for long. Because Mia’s breasts were starting to grow.

As with all the other growth, it started gradually. She bounced her boobs in front of Glenn’s face – she was close to the couch now – but they weren’t moving too much. Her bra was tight, it was excellently fitted, and her tits shook beautifully, but in a way that was tightly restrained.

Then they started to grow.

It was a truly beautiful thing, to watch Mia’s breasts, so long neglected in her expansive dance, catch up with the rest of her body. As her pink bra tried to hold them in place, Glenn could see their expansion fighting against it, as each breast pumped up bigger and bigger, slowly growing, bulging and swelling with each shake of her body.

And as they got bigger, the amount they bounced increased. It was truly arousing to see the shake and wobble of each tit increase with each inch they grew. Where firstly the modest B-cups would gently shake and jiggle despite vigorous movements, now her C, D, E-cup breasts (it was hard to keep up) would shake and bounce like mad, pouring over the lip of Mia’s tight vest top, bulging and ballooning larger and larger, shaking unbelievably as her mad dance continued.

Glenn couldn’t keep his eyes off her expanding assets. Her bra was now looking more and more ill-equipped for the task in hand as Mia’s breasts rapidly outgrew it. As she shook her boobs as they bulged bigger and bigger, her bra quickly became dwarfed by the sheer amount of breast on display. Her tight vest top became tighter and tighter as the boobs beneath it swelled larger and larger, and before long they were spilling over the top in twin mounds of glorious cleavage that shook and jiggled with every move Mia made. And still she danced.

Before long, the bra was like a straitjacket, restraining the beautiful heft of Mia’s gigantic breasts. They were trapped beneath its tightening clasps, but with one extra-large swirl of her swelling boobs, they grew another inch and blasted it open. Glenn could now see the fat tits stuffed into her vest top, and marvelled at how tight it looked, clasping the bulging boobs to her figure, despite how rambunctiously she danced.

Glenn couldn’t believe how large her breasts were now. They were as big up top as her ass was below – large, fat, bouncing breasts that were easily F or perhaps even G-cups. Mia looked stunningly hot, as her nipples poked hard through the vest top, her bra having been completely destroyed.

Mia knew this, she knew her nipples were there, on display, and she – or the thing inside her – wanted them larger too. Glenn could feel it. He could feel the way this whole thing was going. Mia grabbed her nipples, looking tiny atop her beautiful big boobies, and began to tweak them as she danced. Her breasts still appeared to be slowly growing, but now her nipples were following suit, growing thicker and longer as she tweaked them, pushing hard into the tight fabric of her vest top, a garment already struggling to not tear open. Her nipples grew longer and larger, and soon were the right size for her large new boobs. But still she tweaked. And her nipples kept growing.

Mia’s top was so tight now, that Glenn could see the curve of her breasts, and where her nipples and even areolae were. It was like she was wearing tissue paper, her top was stretched so thin.

He saw her hands move towards her areolae and knew what was next. As Mia massaged them, they grew, from small dark patches to large, round circle surrounding the huge nipples that perked out like tablets from her beautiful tits. Was there anything she couldn’t grow?

And then, Mia added the finishing touches to this incredible dance. The pièce de résistance. She grabbed her fat, swollen boobs, and began to massage them. Glenn was confused – she’d already made her boobs grow, but now, as she continued to dance, she was rubbing them up and down, groping and playing with herself in a way that – while highly arousing – didn’t seem to have a purpose beyond titillation. What was she growing?

And then he saw what was happening. Mia’s breasts were filling up. They were already large, fulsome boobs, but they were kept in place by Mia’s vest top, which was looking like it was going to burst open any second now. That time frame seemed even more likely, as Mia’s breasts were engorging. They weren’t growing bigger in a downwards direction, but outwards. They were swelling, bulging, widening – growing more full in every possible way.

Glenn could see the weight and heft of them increase dramatically as Mia massaged her breasts. Before they’d bounced a lot; now they slowly shook like ponderous zeppelins, as their weight and scale increased further and further. Mia’s breasts started to rise up high on her chest, thrusting out large and full and proud like the engorged mounds they were. They had the wobble and shape of overfull water balloons, jiggling and bulbous, utterly stuffed full of liquid. Her breasts were so huge now, Glenn felt sure her vest top was about to tear open. He couldn’t wait to see them in the flesh. So much flesh.

But then a very strange thing happened. As Mia’s massive breasts swelled ever larger, and her top began to tear open, her entire clothing situation began to change. Instead of her tight vest top tearing to pieces and revealing the colossal boobs beneath, as Glenn watched it appeared more and more clear to him that Mia wasn’t in fact wearing a white vest top, but was sporting some kind of latex crimson corset. The black and red fabric clung to her perfect body, allowing her huge ass to pour out at the back, and just about keeping her tremendous boobs in place up top, although allowing an immense amount of cleavage to be displayed.

Glenn blinked. Had Mia always been wearing this? Even if she hadn’t, she looked incredible! At the same time, it looked like Mia was getting taller. She was still dancing, still shaking her incredible figure as she moved back and forth in front of Glenn, but she really did look taller. It was only looking down (something Glenn hadn’t had cause do to for quite some time), that he realised Mia was wearing 4-inch stiletto thigh boots, which wrapped her calves beautifully and only accentuated how huge she was elsewhere. This made perfect sense. As did the fact that she was wearing an obsidian choker with a cowbell hanging off it, which was clanging every so often as she moved her perfect body back and forth.

The dance seemed to reaching its crescendo now. Glenn couldn’t believe how enormous Mia was, and how incredible she looked. She was a pumped up, engorged goddess, and every time she moved now, her body seemed to be getting bigger. The corset, which Glenn now noticed had a black and white cow print on it, was struggling to conceal any of Mia’s luscious body. Her breasts were filling up faster and faster, and were bulging over the top of the corset, which was hugging her gargantuan boobs to the best of its ability.

It was at this point that Glenn knew Mia was going to come. This whole dance had been for him – sure – but it was also about turning herself on, about building something inside her, building it bigger and bigger and bigger, and now it was about to pour forth.

Her gargantuan boobs were riding huge and high and full on her chest, and Glenn could see how stuffed they were from his position on the couch. Her whole body looked stuffed to the brim, and Glenn knew that something would have to give, and would have to give very soon.

Glenn looked at Mia’s face, and noticed for the first time how utterly enraptured she was by this whole thing. Her golden eyes were almost rolled back into her head, and as her body swung and gyrated, her huge, heavy tits swinging back and forth like cannon balls, he could see her come-face appearing. She was going to pop, and it was going to be incredible. Glenn felt like he was going to pop too.

And then it came. The climax of the dance, which Glenn couldn’t hear, but could sense, exploded upon Mia, and fountains of liquid began to spray from her stuffed breasts. Milk fired forth and blasted from her massive melons, as Mia moaned with pleasure. It was the first sound she’d made for quite some time, and it had a very different timbre than Glenn was used to. Deeper. More bestial.

Milk sprayed across the room, and poured atop Glenn as Mia’s colossal mounds pumped the liquid in any direction she faced. Blast after blast of the thick, creamy substance fired out, as Mia slowly and agonisingly climaxed, before slumping to the floor in front of Glenn, panting and gasping, her dance over.

Her titanic boobs pressed into her knees, her huge ass spread out across the floor. Her hips were so wide.

And without more than a moment on the floor, Mia crawled onto all fours, her gigantic udders swinging down, almost bursting out of her corset, fixed her golden, animalistic eyes upon Glenn’s, and opened her mouth to speak for the first time in what seemed like hours, lusting pouring forth from her in waves.

Except Mia didn’t speak. Not in a way that anyone would recognise as human. If anything, Glenn thought, it sounded more like a bestial groan.

Like the moo of a cow.

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This story was a commission – if you want your own, drop me a line at trilon15atgmaildotcom to discuss your BE idea!