Sasha lowered herself into the bath, feeling the hot water sting her skin. She felt all the worries of the day melt away as the foamy water closed in around her, and she closed her eyes, breathing deeply.

She felt the loose folds of the t-shirt flow around her slender body, and they floated in the water, absorbing it and growing heavy and wet. The lady in the store had told her to wear it, told her it would help with her…situation.

Reaching to her left Sasha opened the small cardboard package on the lip of the bath, and removed one small, pink ball. Bath bombs – little orbs that dissolved in bathwater and produced a pleasant smell – but in the shape of tiny, pink boobs, with little nipples and all. They were equal parts creepy and cute, but the lady had told Sasha that these were exactly what she needed. Sasha rubbed her tiny chest with her right hand, and dropped the ball into the water.

Instantly, it began to dissolve, spreading a pink diaspora swimming into the foamy liquid of the bath. Sasha felt a tingling in her entire body, which she hoped was related, and lifted her loose t-shirt up, flowing as much of the pinker water under it as possible, trapping it inside. For a moment it looked like she had a huge belly as the water ballooned the shirt out, but gradually it flowed out, back into the bath.

Sasha lay back, feeling the water tingle all over, closing her eyes and focusing on the sensations in her chest that she hoped meant what the lady had said.

Without daring to open her eyes, she reached a trembling hand up to her chest and felt…nothing. Her breasts were the same, tiny bee-stings they’d always been. Sasha opened her eyes and sat upright, her body sagging with dismay. Maybe she’d always be flat. Maybe she’d never be huge.

Then, slowly, as she looked down, disappointed at her small breasts, she saw her nipples tighten and harden, poking forwards through the fabric. They seemed…bigger than usual. Then, in a moment of extreme delight bordering on ecstasy, Sasha saw her breasts slowly begin to grow. Centimetre by centimetre they began to swell out, very slowly, but consistently, until two small curves were visible beneath her clingy, wet, transparent t-shirt.

“I have tits!” she yelled out loud, to no one in particular, as her breasts slowly curved outwards, two perky little orbs on her chest, made to seem bigger by the wet t-shirt that was hugging her expanding figure. They poked out a good three inches now – bigger than she’d ever imagined she’d be – and were already getting sensitive. Sasha had no idea how these bath bombs worked, but she wanted more.

She splashed more water under her shirt, wanting to cover her growing bust in as much of the pink liquid as possible. The packet of bombs jiggled slightly on the edge of the bath.

Sasha lay against the curve of the bath, arching her back to get comfortable, and to show of the scale of her growing bust to her disbelieving eyes. They were getting so big! Around four inches now, straight out, with what looked like huge nipples protruding through the tight fabric. Sasha hefted her tits with both hands, and was stunned to feel how heavy they were already. She felt a tingle through her body as she began to throb with arousal.

Her breasts continued to inch forwards, swelling with every passing breath, their bulging round curves becoming more and more pronounced with every passing second, as her t-shirt stretched out and out. She loved her new figure; it already had such weight to it, but Sasha wasn’t going to stop now. All these years of waiting for big tits – she wanted to make sure they were big.

She started slowly, picking up one further bath bomb, and placing it in the water. This time, she dropped it down her shirt, and laughed with delight as it plopped down beneath her swelling tits and expanding cleavage – oh my god, she had cleavage! Her six-inch protruding tits were actually getting pretty big now, by anyone’s standards, but Sasha hadn’t really noticed. She was entranced.

The bath bomb landed in her cleavage, and rested there, the water on her breasts dissolving the outer coating, allowing the all-important contents to emerge right where she wanted them – on her swelling bust. She felt it tingling all over her bulging breasts, which were becoming really substantial now, and she couldn’t help but lower one hand down to her cunt, where she slid it inside.

Her breasts grew more forcefully this time, slowly pressing outwards against her shirt, which Sasha was delighted to note was feeling tight on her chest. A shirt being tight! This was too good to be true. Reaching a long finger inside herself, she began to slowly play with her clit, as her tits ballooned outwards on her already large chest, swelling bigger and bigger, as the bath bombs did their work. It was like two watermelons were resting on her chest, ripe and heavy, and they were getting more and more swollen with every moment.

Sasha felt waves of pleasure start to overwhelm her as she played with her clit more quickly. She loved the sensation of building up to a massive climax, and she could feel this one being bigger than ever before. She was bigger than ever before. Her eyes closed, she reached out to rub her left nipple, only to bump into the base of her large left tit – it had gotten so much bigger while her eyes were closed!

Looking down at her growing chest, Sasha started to get really turned on. The two huge, round orbs sticking out eight inches looked absolutely incredible, and she could see them getting bigger. With every passing moment, they stretched further out, taking up more and more room in her struggling t-shirt, which she could feel starting to struggle at the seams, as her bulging bust continued to grow.

Closing her eyes, Sasha went pack to playing with herself, something that was getting more and more arousing with each passing second. Feeling her skin stretch as her huge boobs bulged bigger added an incredible frisson to her masturbation, and the tighter her shirt got, the closer the got to orgasm.

Sasha writhed in the bath, causing water to splash up either side and a small “sploosh” to sound on her left. She ignored it, as her strong fingers fucked her swollen clit, while her other hand cupped a bulging breast, barely able to fit around it as it grew into her.

After a few seconds more, Sasha saw fireworks as her world exploded, and she came incredibly hard.

She lay back in the bath, eyes closed, panting, her huge, heavy chest heaving up and down with each breath. Strange…it felt even heavier than usual. She couldn’t have grown that much in the past half a minute.

Sasha opened her eyes, and her blood ran cold.

The open box of bath bombs lay lying in the bath, its contents dissolved into the water.

She looked down, to see her chest covered in pink powder, already starting to swell.

Oh shit.

How big was she going going get?

Sasha panicked, trying to wipe the pink, breast enhancing dust off her already huge chest with her hands. Her fingers kept brushing into her tits, which were already starting to expand again, and it became incredibly difficult to predict how big they were going to be the next second.

Sasha dipped her body underwater in an attempt to wash off the remnants of the powder, but her huge, growing tits didn’t quite make it under – at ten inches straight out in front of her, they were just too big. And she could still feel them growing…

Sasha panicked. Seconds ago, she was enjoying the post-coital glow of fucking herself senseless while playing with her nicely swollen boobs, now she was panicking at the thought of her tit-growth never stopping. Admittedly, part of her really wanted to get huge, but the more pragmatic part wanted to be able to move around the world like a human.

While all these thoughts were going through her head, Sasha’s chest started to expand, more quickly this time. With each passing breath, her breasts blew up, growing bigger and wider with each passing second. She had no idea how many breast-expanding bath bombs were in that box, but they were all in the water now. She had to get out.

Hefting up her massive right breast with her left hand, Sasha was able to extract her right hand, which was trapped under there. Upon letting it go, it splashed into the water like a boulder, and Sasha placed either arm on the bath, preparing to leave.

At this point, her breasts surged forwards, growing bigger and wider, putting real strain on her already very tight shirt. The seams started to give, as her tits expanded into it, and little pink bits of breast were soon visible as the shirt began to give up the ghost. Sasha couldn’t believe how big they were now – upwards of twelve inches of titflesh bulging out like mad in front of her. The neck of her t-shirt was inches from her chin, and she could see what seemed to her like limitless cleavage stuffed into the shirt below.

Sasha heaved herself up, and immediately fell back down. Her swollen mammaries were so heavy! As she fell back in, she felt her tits slap down into the water, and wedge firmly against the side of the bath, growing and swelling all the time. She went to lift herself again.

No luck. Her breasts were growing at such a rate – thirteen inches now – that they were well and truly wedged in against the walls of the bath. What was she going to do? She didn’t have much choice; she was going to have to get even bigger.

Breathing deeply, Sasha felt her already enormous chest expand further and further, pushing against the walls of the bath as she got bigger and bigger and bigger. Her nipples were huge bullets poking against the tattered fabric of her formerly loose shirt, which was absolutely ripped to shreds trying to contain her swelling bulk.

Sasha closed her eyes, feeling such growth on her chest that she was sure she was going to burst. She was just getting bigger and bigger – so huge now! Fifteen inches, it was like two beachballs were being blown up right on top of her – they were so pert and firm and glorious, but she wanted to be out of here, if only she could-

There was a rubbery popping sound, as Sasha’s breast bulged over the top of the bath. They’d gotten so huge, they simply didn’t fit in the container of the bath, and had squeezed up to rest of the lip of it. Sasha took this opportunity to try and stand up, hefting her massive twin zeppelins as she clambered out of the sopping tub.

Unable to walk under the weight of her huge, still growing bust, Sasha leaned against the door, feeling her swelling tits pushing her away from it. She was getting scared now – they were about sixteen inches, and so huge and incredible and she wished she wasn’t so turned on but she was. Leaning back against the sink, she navigated past her humongous left breast and opened the door, wobbling her way to the bedroom.

Lying down on the bed, she heard it creak with the weight of two huge medicine balls on top of her slender frame. She looked like a pornstar had been blown up with an air pump, and as much as she had felt scared, now she felt nothing more than arousal.

Her massive, wobbling jugs rested like two huge water balloons on her chest, and every breath seemed to make them bigger. They were around seventeen inches straight up now, Sasha estimated, and with one final jiggle, their growth finally seemed to stop.

Luckily, she could just about reach her nipples. Rubbing them, she felt them harden instantly, long and erect and engorged.

Sasha breathed a sigh of relief, looking up at the two towers and the mass of cleavage between them that now rested on her chest. They were so heavy and glorious. She had big plans for these.

But first, some fun.

Looking at the enormous canyon of cleavage above her, blocking out the rest of the room, she reached her right hand down, and slipped it between her legs.

—

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