Mary awoke with a yawn and a stretch, her arms accidentally bumping into Rob. He groaned in bed, and turned away, and Mary rolled onto her back, where she suddenly felt pressure on her chest, like it was slightly hard to breathe.

Her head felt fuzzy, probably from all the gin she drank last night, and thinking was more difficult than she was used to. What had happened last night? She remembered some gorgeous big-titted blonde at the bar, and then confusing feelings came up in her mind. She was jealous of that woman, because that woman had big tits, but then she felt the weight on her chest, and when she looked down, observing the mass of cleavage lying heavy on her, she knew she had no reason to be jealous – she had a fantastic pair of DD breasts that fit her slim frame perfectly. Tits that Rob loved, and had always loved. So why did she feel jealousy?

Mixed among those feelings, which were getting increasingly difficult to parse as Mary’s brain swam, warm and fuzzy in the cool early morning, air-conditioned air, her head throbbing a little from all the booze, mixed among all those feelings was a deep and primal lust that coursed through her veins. It was lust for her husband, but also for this woman’s figure, for the slim body and huge tits she demonstrated. Not that she was very different from Mary, with her large boobs that she loved to play with so much.

All this talk was getting Mary very horny indeed. Also she’d worn some of her old clothes to bed, because her vest top was incredibly tight around her large, round breasts. They were crammed in, her rock hard nipples poking through the fabric, enticing Mary to reach down and tweak them, moaning with pleasure, her cunt convulsing with arousal as she did so. She needed cock, right now. Her mind was foggy and confused, but that much she did know.

“Morning.” She purred, leaning over, her large breasts bulging into Rob’s back, who grunted a little as he rolled back into her. Mary loved how her breasts blobbed into her as he pressed against her, creating insane cleavage as they pressed together, as if she was wearing a corset. She loved having big tits. It was so sexy, and Rob loved them almost as much as she did.

“Hey babe.” He murmured, and when Mary expected to see Rob’s pudgy body as he turned over, instead she was met with a slim, toned physique that was very appealing indeed. Mary’s brain struggled to process the cognitive dissonance. Why had she been expected Rob to look pudgy? He was her fit, toned husband – he’d always been that way, hadn’t he? Just like she’d always had these luscious, large breasts. And as she thought about how gorgeous her breasts were, she straddled Rob, who was now very much awake, if the power in his cock was anything to go by, and leaned down to kiss him on the mouth. Her breasts slipped out of her top, too large to be contained, and rested on his chest. She lowered one huge tit into Rob’s mouth, and he sucked on it, teasing her bullet nipples with his tongue.

“Fuck me, lover boy.” She whispered. Rob replied with a silent smile.

**

Feeling the warm, gentle post-coital afterglow in every inch of their bodies, Mary and Rob went down to breakfast, their slim, powerful bodies matching up far more with the general size and shape of the denizens of the hotel. Mary found Rob looked far less at other women than she had assumed he would, and she knew that was because she looked amazing, and he had only eyes for her.

Unfortunately, she must have forgotten to pack her clothes properly, because everything in her closet was a bit snug on her. Her bras were almost comically small, every one she tried to wear bulged her breasts up like she was wearing something about 4 cup sizes too small. She tried to loosen them up to their largest size, but even then they were too tight and painful to wear. Her breasts were simply too big. Fortunately, Mary’s boobs were so pert, round and firm that she didn’t really need a bra. They didn’t look fake, but they did look massive. They were so large and round that they rested comfortably on her chest, so she decided to forego a bra. All her tops were mysteriously too small on her, and Mary just couldn’t for the life of her figure out why. She knew she was a smart woman with a PHD in something – though she couldn’t for the life of her remember what – and sure she may look like big-titted bimbo with these gorgeous breasts, but she had no idea why she didn’t have clothes that fit her size. She must have just packed a bunch of old clothes when they went last-minute on this trip. Either that or her tits magically grew overnight! Mary giggled at the thought, her large chest shaking from side to side. She immediately grew wet, and had to control herself, given she was in public.

Mary tried a bunch of outfits on, but all her tops were just too small for her substantial breasts. She couldn’t believe she was silly enough to bring all these small items, so instead she decided to lean in to her situation, and squeeze her boobs into a tight tee. Her impressive chest stretched out her top massively, and her two orbs looked absolutely delicious trapped behind the cotton prison. The tightness of the top kept her pert breasts up, giving them even more lift. She looked incredibly good, Mary had to admit. Rob certainly couldn’t take his eyes off her.

She found wearing her jeans was a challenge, too. They must have shrunk in the wash, because when she tried to squeeze her ass into them, she almost busted the fly trying to do them up. She managed it in the end, but her thick thighs and impressive ass absolutely stuffed them to the brim. It meant she walked with a bit of waddle, afraid of bursting her clothes apart at the seams, but it did mean she looked incredible, and Rob certainly didn’t seem to mind. He had his hands all over her at all times, having to resist tweaking her large, round nipples, instead settling for resting his hand over her giant ass cheeks, which were stuffing her jeans to the max.

Mary sat down at the breakfast bar and heard a “pop”. She knew some of the seams in her jeans had burst, and part of her wasn’t surprised. She had memories in her mind of this happening before – she knew she had a massive butt and thighs, giving her, along with her substantial breasts, a perfect, curvy hourglass figure – but she was surprised she hadn’t planned for it. Maybe she had a spare pair upstairs she could change into. She rested her breasts on the table, glad to have a short break from supporting them. They were so delectable, she had to resist grabbing them with both hands. Why was she not used to having such big tits? Mary wasn’t able to answer this simple question – something in her was delighted about how large her chest was, even though as far as she could remember, she’d had this impressive rack since the end of puberty. The mind was a funny thing.

“Would you get me some food, darling? My jeans have gone again. And I’m hungry.”

“I’m not surprised.” Rob smiled, his stomach flat and toned in his slim-fit tee. If anything, Rob seemed to have the opposite problem to Mary, in that his clothes all looked a little big on him. Where hers were starting to look a little painted on, they were so tight, his were loose over her slim frame. His tee and shorts looked like those designed for a much larger, chubbier man, and with Rob’s svelte figure they almost looked…baggy. That was fine, Mary loved how toned her husband was – she couldn’t wait to enjoy his body again, once she’d stuffed hers with food – she was so hungry!

After a delicious breakfast where Mary only got a little bit of food mess on her large breasts, which for some reason she just wasn’t getting the hang of dealing with this morning, they pulled up from the table, Mary tottering a little, her jeans so tight across her gorgeous thighs and ass, threatening to burst open even further, and waddled back to their room. Her breasts felt so full and tight, reflecting her clothes that clung to her impressive form, so Mary demanded that Rob suck on her tits, and immediately pulled him into bed. Before doing that though, she teased him by bending fully over in her tight jeans, ripping a hole clean through the backs of them, her bulging flesh pouring through the gaps. Rob drooled at his large, beautiful, engorged wife, and tore the rest of the clothes off her, throwing her down on the bed, which creaked and groaned under the weight, and they made passionate love, coming together with twin moans of pleasure.

**

“After that I think I need a dip in the ocean.” Mary smiled, kissing Rob once more and hauling herself to her feet. For some reason her body just felt very heavy and immobile today, like she wasn’t used to it. It made no sense, but to be honest, the fuzziness in her brain hadn’t subsided, so she wasn’t able to focus on anything for too long. Her main thoughts were taken up with her handsome hubby and her luscious rack.

“Sounds prefect.” Rob smiled, rinsing himself off in the shower and then slipping into some too-large swimming shorts.

Mary decided to get changed straight away, because the naughty, slutty part of her liked strolling around the place with Rob’s cum still inside her. She felt like she could feel it sloshing around inside her, though her breasts were so heavy and full maybe it was them that were sloshing. Mary dimly found herself wondering what it would be like to have huge, milk-filled titties, the liquid sloshing around inside her stuffed, engorged globes. Then she shook her head, and the thought went away. Her mind was doing funny things on this trip. But the residual sexiness of that image stayed, even as her thoughts wandered on.

She grabbed a bikini from the wardrobe, but once again Mary found it lacking in the size department. Luckily, she could adjust the length of the ties to give her large breasts a bit more space to move, but the simple fact was that her breasts were far too big to be covered by the triangles of fabric. It was kind of embarrassing that she’d bought something so small, but Mary had to assume it was an old one from before she was fully grown. It was all she had, so it’d have to do. She squeezed her breasts into it, the large amounts of pale flesh spilling out either side, but at least her rock hard nipples were covered. Mary loved looking at her large spread of boobs, how far they emerged from her body, how small all her clothes felt on her. That was how to feel big, she mused – just buy clothes that are too small for you!

Her bikini bottoms barely fit around her thick thighs and large ass cheeks, and ended up getting almost entirely swallowed by her bulbous butt, but at least she was technically covered, and wouldn’t arouse too much suspicion.

She grabbed a towel, threw her arm around Rob, her breasts bulging into him, and together they walked down to the beach.

The sun was blazing when they arrived, and the ocean had never looked more inviting. They parked up under a large umbrella, and took two deck chairs, lying down in the warm shade. The beach was reasonably sparsely populated, just a small group of men and a couple who were talking a giggling, lying there in the sun.

“Hey, would you do my back?” Mary asked, reaching into the beach bag to grab the lotion. Her breasts bulged into her legs as she did this, sending a visceral thrill through her body. When she came back up with the lotion, she saw Rob staring out to the beach. She followed his gaze, a deep pit opening up in her stomach. What was he looking at that was more important than her?

And then she saw. The couple who were lying in the sun laughed and turned, and Mary saw that the blonde woman had the largest pair of breasts she had ever seen. Forget the barmaid last night – her tiny tits were chump change compared to these mammoth milkers. They erupted from this woman’s otherwise slender form like mountains, stuffing her large pink bikini to the max, making it look like it was going to burst open any moment. They were implants, clearly, from the way that they stood out from her chest like zeppelins. They were absolutely enormous, and as the man she was with began making out with the busty bimbo and caressing those incredible, massive tits, she could see Rob’s large cock tenting in his shorts. Everything fell into place in that moment, and Mary knew that even her large tits weren’t enough for Rob. She’d always felt like there was something wrong, deep down, with their relationship, and now she knew – she wanted him to look at her paltry form with the same lust he reserved for these truly titanic tits. She marvelled at their scale, their massive, full, fake roundness constantly getting in the way of what she was trying to do. She almost bumped over the drink she had resting on the table when she turned, her huge hanging knockers almost like udders on her otherwise slim frame.

And Rob was staring at this hugely busty bimbo with the blonde hair and the bolted-on tits like she was the sexiest woman in the world. And Mary felt so small, she didn’t know what to say. Eventually, he stopped looking, and turned back to Mary.

“Did you say something?” He asked, innocently, like he didn’t know she’d seen him ogling over this huge busted beauty.

Mary looked away, her glittering eyes fixed on the ocean.

“Just daydreaming.” She replied.

**

That night, Mary found herself in the throes of a deep, fitful series of dreams. It was hard to remember the specifics, but each one feature that huge-titted bimbo on the beach, her bowling-ball sized breasts bouncing and shaking, their massive fake bulk pressing into her partner, as she giggled and sipped champagne. Except when Mary looked closer it wasn’t her partner, it was Rob, who was looking deeply lustfully at her giant fake rack, which was so much bigger than anything Mary could offer, and was about to lean in and suck on one of her massive nipples.

Mary awoke with a start, covered in sweat, her chest heaving. Everything felt tight. She was distressed, like she’d been the night before, and there were other feelings throbbing through her, feelings she didn’t very much feel like addressing, so she pushed them from her mind. Her already tight vest top was feeling tighter than ever, and her little sleeping shorts were snug around her large butt. Rob slept soundly, snoring gently in the bed, but Mary was never going to get to sleep feeling like this. She slipped out of bed, her body hot and bothered and sweating away, her mind descending deeper into fuzz, and made her way to their huge bathroom and shower. She needed to clear her head.

Mary stepped into the large glass shower cubicle, shucking her clothes from her sweating body, and turned the water on. As it poured over her body, she imagined she was that busty blonde porn star from the beach, showering in praise and cum, adoring the attention and delighting in the adoration coming from everyone watching. And Mary felt herself in that body, running her hands over her huge fake tits, before realizing she was looking at her own, tiny tits, barely E-cups on her slim body. Nowhere near as large as this woman’s. But what if they were bigger? What would that look like on her? Mary started to imagine, to think what she’d be like with truly huge breasts, and in her mind’s eye she saw herself, and as she looked down, her body started to change.

Her mind was too fuzzy to really get a sense of what was happening to her, her PHD in chemistry unable to translate the reality into something that her brain could understand, but her breasts were…growing. As the water ran over them, they began to inflate, slowing plumping up larger even she looked. It was like the water was running through her skin and ending up in her breasts, which were slowly ballooning larger as she looked. They were stretching out in front of her, getting larger and heavier as she stared, groaning to either side of her, now wider than her slim torso. She loved the sensation of them growing, loved how her brain was telling her this was insane, but also to let this happen; this was everything she’d ever wanted.

Still her breasts grew, getting bigger and wider and larger and heavier as the water poured down from above. Mary started to groan with pleasure as her tits gradually swelled to become bowling balls, huge and round and heavy and incredibly fake-looking. She could feel the silicon inside them, filling her up, sloshing around until the breast became so full there was no room for anything to move. Her breasts engorged further, now so big they were brushing against the glass of the shower. Her nipples immediately grew erect as they touched the cold glass, and Mary almost staggered to the floor as she beheld her new, giant rack. Her tits were so big! They were so huge, the size of her head, so big that she could barely fit back out of the shower. She turned off the water with some difficulty, her breasts obscuring her view of the taps (and of her feet, incredibly), and she squeezed out through the glass doors, her breasts pushing them open long before the rest of her body got there.

She looked down in amazement, almost unable to process how gigantic her tits were. They bulged out from her, meeting in the middle in an enormous mass of cleavage. They were the biggest breasts she’d ever seen, with the exception of the huge-titted bimbo on the beach. The brain fuzz was so much stronger now, her head full of cotton, thoughts slowly bumping into one another like strangers on a train. Why had she been so jealous of that woman? Her tits were as big as the woman on the beach – possibly a little bigger. As Mary had that thought, her breasts gently ballooned a couple of inches larger, now so big they pushed into her arms if they lay by her side, and Mary knew for sure that her breasts were the biggest. They were absolutely enormous! She remembered how expensive the experimental surgery had been, how excited Rob had been when she’d had it done, and the look in his eyes when she’d been allowed back home and to remove all the medical tape and bandages. He’d not let her out of his sight for weeks, as they just fucked and fucked and fucked until they were sore from all the excitement.

Mary looked down at her tits, which were now larger than her head, and knew she had nothing to fear – she had the biggest tits in this hotel – hell, maybe the biggest tits in the world, who knew? And Rob knew that, and loved it. Still, Mary thought, as her head grew fuzzier, and her IQ dropped further, like, maybe I should remind him who was really the biggest bitch there is.

Struggling to pull her vest top over even one of her breasts, let alone both, Mary settled with just hanging it over the huge shelf of her gigantic fake boobies, and slipped back into the bedroom, where Rob lay sleeping.

“Hey, big boy.” She purred, lifting up the covers and running her hands over his cock, which stirred almost immediately.

“I’m going to tit fuck you and suck your cock at the same time, how about that?”

Rob’s eyes gently lifted open, his impressive cock standing to attention, and Mary put him between her giant tits, taking the head of his cock in her mouth, smothering his large dick with her enormous breasts, and began to tit-fuck him into oblivion.

“I’m dreaming.” Rob smiled, as pleasure took him into oblivion.

But he wasn’t. Not by a long shot. And things had a long way to go yet.

To BE concluded…

