Over the next few days, Jack and Christina’s antics only intensified, as did their bizarre penchant for making it look like their…appendages were growing.

Grace fully admitted she was starting to get dick on the brain, as even when she was working she found herself suddenly trawling websites drooling over huge cocks, and imagining them shoved inside her tight cunt, but even so the kinds of clothes Jack was wearing were ludicrous. He wore tighter and tighter shorts, or maybe they were the same shorts but they were getting tighter. Either way, his fat juicy dick was shoved in her face (metaphorically) as she desperately tried to get shit done. It was really hard to focus.

And the way Chrstina’s breasts were growing, it was as if someone had attached a pump to them, and every time she went left the room, she shoved it onto both titties and set it to max. Before long, her tits were entering the room way before she did, and the jiggling ,wobbling masses that she tried to stuff into her various old dresses were laughably large.

Grace found this bizarre behaviour incredibly distracting, as every where she looked were huge tits and massive dicks, the very things that turned her the fuck on and drew focus her from work, which was what she needed to be thinking about.

She also found anything vaguely phallic incredibly distracting, as she discovered to her dismay when she went to grab a cold glass of milk one night. Jack and Christina had been fucking all evening, as was their standard routine now, and Grace had decided to sneak to the fridge to get a snack. Unfortunately, Christina took this moment to come out and grab a glass of water, so the two of them bumped into each other – quite literally, in the case of Christina. Her breasts, and Grace had no explanation for this, were absolutely gigantic, and stuffed inside a huge, industrial-strength bra which could barely contain their swollen bulk. Christina sashayed across the carpet, her breasts leading the way like zeppelins, and bulged towards the fridge, smooshing into her own tits as she opened the door.

“Hey babe.” She murmured, huskily, struggling to get the door open and not knock her fat tits in the process. “I’m thirsty.”

Grace bit her lip, looking at the huge cleavage in front of her. Unbeknownst to her, Grace’s breasts – already so much larger than she was used to – started to swell. Grace wasn’t wearing a bra, as it was late, so she didn’t notice the expansion. But they grew. Bigger and bigger, as the two women were standing their, one panting, the other getting wetter and wetter, the two pairs of breasts, one large, one simply gigantic, slowly moving towards each other.

Christina gulped the huge glass of water, her belly distending as she filled it, water dribbling down her gigantic cleavage as she swallowed. She gasped with delight, wiped her mouth with the back of her hand, and burped, gently.

She leaned forwards to place the glass on the counter, and her colossal breasts bulged into Grace’s already very large twins. Their faces were incredibly close, their lips almost touching. Grace could feel Christina’s breath on her. She was so hot and wet, desperate to kiss this gorgeous specimen.

Then: “Get back in here so I can fuck yas senseless!”

The spell was broken, and Christina smiled, her bra creaking and groaning as her own breasts shook and wobbled within it, growing all the while, and waddled back to her room for another pounding. Grace watched her beautiful round ass as she walked away, and realised Christina’s breasts were now so large they could be seen from behind. With that she grabbed her cucumber, and retreated back to her room.

When she got there, Grace realised she hadn’t brought a knife to slice it up. She looked at the large, thick vegetable, and sat on her bed, biting her lip. Her own breasts had ballooned over the last few days, but Grace refused to accept it. She wasn’t a pumped-up bimbo like Christina. She was a hard worker, and a good student. Even though her tits now thrust out like overfilled water balloons, stuffing any top she tried to squeeze them into, she refused to buy any new clothes. She had work to do, she couldn’t be thinking about sex all the time.

Grace looked at the large, thick, juicy cucumber in her hand, and slowly slid her wrist up and down it. She could barely see it below her bulging tits, which were gently, inexorably spreading outwards, her top complaining as it stretched. Before she knew it, she had slid the cucumber into her, massaging her swelling boobs with her free hand. Her screams of pleasure grew to match the yelling from the other bedroom.

**

It was almost 10 days since Mike had bought Grace those bizarre presents, and in the interim he’d barely thought about anything else but sex. Throughout his day job all he could do was imagine fucking Grace, but not only that, Grace with those wonderful, swollen boobs she seemed to have last time he saw her. If there was one thing that made Grace sexier, it was having larger breasts. And the last time he’d seen her, Mike had not been disappointed.

He was disappointed however to have not heard from her for days, so when she finally got in touch, Mike felt like he was going to come immediately in his pants. He held off, grabbed his stuff, and rushed out the door.

Upon arriving at Grace’s place, something was immediately wrong. It was a Saturday, but the house was completely empty. No Jack or Christina nosily lazing about the place. It was ominously quiet.

Grace opened the door in a huge, loose bathrobe, her make up gorgeously detailed. She looked absolutely stunning. Mike leaned in to kiss her, but she backed away, fear in her eyes.

“Would you…like a drink?” She asked. She was shaking a little. She looked nervous. Mike noticed the empty chocolate box on the table, and the flowers he’d bought, in pride of place. He assumed the teddy bear was in the bedroom.

“Just a water thanks.” Mike smiled. Something was wrong, but it didn’t feel bad-wrong. On the contrary, he felt like something unutterably wonderful was about to happen. He just had to let it come to him.

Grace sat down, her legs to the side of the chair, facing him. Mike opened his legs, his tight jeans revealing his bulging crotch. He’d worn his tightest jeans. Grace’s bath robe seemed to be extending very far from her body. And it was moving away from her, slowly but surely.

“My exams are coming up soon.” She started, but then looked down at Mike’s crotch. Her face blushed, and she rubbed her thighs together.

“How’s it all going?” Mike asked, nonchalantly grabbing a banana from his bag, and peeling it.

Grace eyed the banana with undisguised lust, as Mike slowly ate it. Her robe grew tighter.

“Um, so I’ve been feeling a little…off, lately.” She began, and Mike slowly ate the banana. “And I’m not sure if it’s…I don’t…”

She seemed lost for words, and then Mike stood up to take off his jacket, and Grace pounced on him. He was taken aback by her bestial power as she kissed him hard on the mouth, removing his jacket as she ran her hands over his body, immediately sliding down to his fat cock.

“Oh yeah, you’re gonna fuck me good with that huge dick, aren’t you.” She moaned, pushing him to the couch, pinning him with her body. She was so heavy. How was she so heavy?

Immediately Mike felt the weight on his chest as Grace pressed her body into his, and he knew what was going on – he knew that Grace’s breasts were going to be stupendously large. But nothing prepared him for the sight that met his eyes when she opened up her robe.

As the soft fabric slid either side, a truly gargantuan pair of breasts ballooned outwards from his slender, svelte girlfriend. They had tripled in size at least since he last saw them, and were now positively stuffed into the tight, white t-shirt she was trying to keep them contained in. Already big, damp patches were forming around the nipples, and as she fumbled with Mike’s pants, he could see Grace’s breasts swell larger, slowly groaning bigger beneath the stretching cloth as they grew ever wider and heavier.

Mike didn’t know what to think, but he knew that these colossal, watermelon-sized breasts were the sexiest thing he’d ever seen, and that he was going to fuck them right now.

“I want you inside me. In every possible way. I want you to dominate me, fuck me, treat me like your slave.” The words coming out of Grace’s mouth were too good to be true, but immediately he knew they were real, as Grace removed Mike’s pants, and lowered her mouth over his rock-hard cock. He was so huge and hard, she could barely get her lips around his giant dick, but with some spitting and struggling, she choked her throat down around it, and started sliding up and down.

Mike was in ecstasy as his gorgeous, pumped up, sex-crazed girlfriend gobbled his dick like never before. Her huge tits were starting to swell even larger, pushing her up as if she was lying on an inflatable mattress, rising up in the air as her balloons grew larger, taking up more and more space, spreading out onto Mike’s legs. He could hear her top starting to tear apart as her breasts reached ever-larger proportions.

Before long, her tits were too big for her to comfortably suck his cock, so she removed her mouth from his huge dick (which seemed larger than usual to Mike, though things were so crazy it was hard to tell), and placed her monstrous boobs over his cock, completely hiding it from view. She kissed the tip of his shaft, throbbing and red, and started to tick fuck him with her cannon-ball sized breasts. They were ridiculously big now, and the nipples were red and swollen, starting to leak…milk onto him, they were so stuffed and full. This was something else. Mike’s mouth hung open.

“Mooooooo.” Grace started to moan, as she produced a choker with cowbell to go around her neck. “I’m your cow and your slave, fuck me master, fuck me!”

Mike was too aroused to even know if this was real, when suddenly from Grace’s bedroom Jack and Christina waddled out. Waddle was the only word for it, because Christina’s breasts were larger than beach balls. They were practically medicine ball-sized, and swung down almost to her belly button. They were the largest breasts Mike had ever seen. Without saying a word, she lay on her back on the floor, and Jack entered her. How his monstrous dick fit inside her Mike could never know, but they immediately started fucking right next to them, groaning and growing larger, spurting milk from her fabulous udders all the while.

Grace clambered on top of Mike, her tight black skirt barely containing her butt as she lowered herself onto his huge dick, and started riding him. She screamed with pleasure, and lowered one of her gargantuan breasts towards his mouth, like a giant fleshy balloon, placing her giant nipple into his mouth, squirting blast after blast of hot, thick milk into his mouth, which he drank greedily.

Her other huge tit she left for Jack to clamp his mouth around, which he dutifully did, while riding Christina, whose own tits were firing milk up into the air like the enormous, fleshy volcanoes they were.

Soon all was consumed in an orgy of pleasure, excess and milk, with the two men’s cocks slowly expanding as they consumed the milk, the two women growing larger and bustier with every second that passed. Mike could feel the weight of just one of Grace’s tits pressing down on him, almost covering his whole chest as she ballooned larger, her boobs bulging into each other and practically taking up the entirety of the couch. Mike couldn’t even tell how huge Christina had grown – it was like standing at the base of a mountain; its scale was too hard to gauge this close.

Eventually, everyone in the room came with the force and sound of a freight train, blasting hot, thick sprays of cum into the women while their breasts erupted in streams of milk that mirrored the ejaculate firing inside them.

Before long, all was done, and the women lay there, the men still inside them, their breasts slowly pulsating and heaving as they breathed deeply, trying to regain control as the powerful lust slowly began to recede like the tide.

Before too long, a gentle voice wafted through the breeze, and they looked up to see the teddy bear on the table, looking at them.

“Don’t stop now.” It purred. “You can get bigger. You can all get bigger. Grow and fuck. Grow and fuck.”

And, slowly but surely, the men’s cocks hardened, seeming to swell even larger than their already inflated size, and the women smiled, their impossibly large breasts already taking up so much of their bodies, and everyone prepared for things to get seriously amazing.