This story contains adult content. It contains descriptions of sexual activities, and growing breasts. Read this story at your own discretion; you have been warned. Also, a note on cup sizes: since I’m not really an expert I looked it up and apparently the proper order for most of Europe and the US is AA, A, B, C, D, DD (or E), F (or DDD), G, etc. so that’s the order used in this story.
Malcolm was an average guy in his late twenties, with a nice apartment in the city, a decent job, and some good friends who he’d just been drinking with. All in all, he really had nothing to complain about. Except for one thing; Malcolm, or Mal as his friends called him, was not particularly lucky when it came to the opposite sex. He had been involved with a girl until recently, and that relationship seemed to be getting pretty serious, until Mal had made a mistake. You see, Mal has a fascination with breasts. This in itself wouldn’t have been a problem, but Mal’s particular interest was breast expansion. Not silicone implants, either; Mal liked to imagine a girl’s breasts growing by themselves, naturally, preferably fast enough to see with the naked eye, but slow enough to really enjoy it. He wanted the kind of breast expansion that was, unfortunately, purely the realm of fiction, and could never happen in the real world.
This still wouldn’t have been a problem, except that he’d foolishly decided to tell his ex-girlfriend that. She didn’t take it well, and thought he was just a weird pervert. And so, Mal had been single again for a few months now, and found himself leaving from the pub alone on this rainy night. The day had really been a scorcher, so the rain brought some welcome coolness.
Nevertheless, Mal was glad to be out of the rain when he entered the subway station. He shook his umbrella dry as best he could, closed it, and waited for the train that was just arriving to come to a halt. As he got in, he noticed that the car had just a few occupants, which was not unusual this time of night.
It was as he sat down on one of the many empty seats that he first noticed the girl. She was asleep in the seat across from him, and the first thing he noticed was her cute face that was framed by shoulder-length raven black hair. She was definitely his type; she had an athletic body, with just enough fat to pad her out in all the right places – Mal couldn’t stand those anorexic stick figures that passed for models these days – although her bust was rather small for Mal’s tastes, maybe a B cup at best. He couldn’t help but imagine what she’d look like with a bigger pair, and soon the image of her breasts growing, filling out her shirt, filled his mind.
He must’ve been staring at her since another passenger shot him a reproving look. He quickly picked up a newspaper from the seat next to him and began reading it. Still, he couldn’t help but steal an occasional glance over the top of the paper at the sleeping cutie. Minutes passed, and Mal wondered whether he would have the courage to talk to her if she’d wake up. Probably not, he decided. Not that it mattered, since the girl was fast asleep.
Distracted as he was by the girl and the beers he’d had this night, he still didn’t miss his station being announced and got up as the subway train began slowing down. He looked at the girl one last time, regretting that he’d probably never see her again, and got out.
But just as the doors began to close, he could see the girl jolt awake suddenly, look around her, and jump up to make for the door. Mal stuck his arm between the doors to prevent them from closing, and the girl gave him a smile and a quick “thanks” as she squished through them, and then walked away. Sighing deeply, regretting not saying anything, lamenting another missed opportunity, Mal walked leisurely towards the ticket gates, the train gliding out of the station behind him.
He was surprised however to find the girl standing at the exit of the station, looking anxiously outside. It was still pouring with rain, so it was not hard to imagine why, since unlike him she didn’t have an umbrella. An old man wearing a gray coat that looked much too warm for the weather approached the girl.
“It is nay gonna clear up soon, lass,” he said with a heavy accent. “Ye might as well go fer it, or ye’ll be her all night.”
The girl shook her head. “I can’t,” she muttered. Mal thought she looked almost afraid.
“’t Is only water, ye know. I dinna think ye’re gonna melt,” he replied, but when the girl just shook her head again he shrugged, pulled his coat over his head, and set out into the rain himself, quickly vanishing from sight.
Mal thought she was being a bit silly, but maybe her shirt was a fabric that would turn see-through when wet or something. Getting his mind out of the gutter, Mal quickly realized he had an opportunity here. He opened his umbrella and held it over the girl.
“Hi again,” he said, smiling. “Maybe I can help you.”
“Really?” She said, an expression of relief forming on her face. “Are you sure? I don’t live very far from here, but I don’t want to be any trouble…”
“It’s no trouble, really. Please.”
“Thank you, sir,” she said as they stepped into the rain; Mal was nearly instantly drenched since he wasn’t under the umbrella. “I’m Melanie,” said the girl. “Call me Mel.”
Mal couldn’t help but laugh, and when Mel gave him a quizzical look he quickly said, “And I’m Malcolm, but my friends call me Mal.”
Mel grinned. “Mel and Mal. Sounds like a comic duo, or something.”
The ice broken, the two continued talking as they walked along the deserted streets. Mel was a student, Mal discovered, majoring in bio-engineering. She was intelligent, had a sharp wit, and shared his taste in music. Mal decided that, small breasts or not, this girl was both the nicest and nicest looking girl he’d talked to in the past months, maybe even years, his ex-girlfriend included. He was just trying to work up the courage to ask her out when they heard a car approaching from behind.
It was an ordinary car, extra-ordinary only because it was the only car they’d seen so far. Its headlights illuminated the rain falling down in front of it, and a large puddle it was about to drive through. Water splashed up from the side of the car as it did, and Mal and Mel, who couldn’t get out of the way in time, both got a full load.
“Well, so much for staying dry,” Mal laughed. “I’m sorry.”
But Mel was looking very distressed, looking down at her soaked shirt in horror. For a moment it looked as if she wanted to take it off, but she didn’t. Mal also noted, with a twinge of disappointment, that it wasn’t turning transparent. All the water seemed to have accomplished was getting her wet, so Mal failed to understand why it bothered her so much.
“Come on,” he said, “you said we were almost there, right? You can change clothes when you get home.”
“No, no, you don’t understand,” she replied, almost hysterically.
Mal looked her over again, but still didn’t understand why getting wet was so terrible. He was soaked to his underwear himself by now, and it didn’t seem to hurt him.
But then, he saw that Mel’s shirt was slowly getting dryer on the front. He rubbed his eyes and looked again, but the wetness was definitely disappearing. He wondered where the water could be going, but not for long. Before his very eyes, Mel’s breasts were slowly inflating. It was barely noticeable under the loose shirt, but they definitely looked fuller than they had been a minute ago.
Mel noticed him watching. “I’m… I’m sorry,” she stuttered. “You shouldn’t have seen that. I have to go home.”
She backed away from him, out from under the umbrella, turned around, and broke into a run.
“Mel, wait!” Mal shouted, and ran after her. Mel however was as fit as she looked, and a fast runner, so Mal didn’t manage to catch up with her until she was fumbling with the keys to her apartment.
“Stay away!” She yelled when she spotted him.
“Mel, please, if there’s anything I can do…”
“You can’t help me,” she said. “No one can help a freak like me.”
“You’re not a freak!” Mal said, and there was something about his tone of voice – or maybe it was his look – that made Mel believe he meant it. “At least tell me what’s happening,” he continued. “You can’t just leave me here not knowing whether you’ll be alright.”
They stood in the doorway for a few moments, staring at each other. Mal noticed that the front of her shirt, which had gotten wet in the rain again, was drying up once more. And again, her chest grew as it did. Where she had barely been a B before, she was now around a C cup by Mal’s best guess.
When it appeared obvious to Mel that Mal wasn’t freaked out by what was happening, she let out a resigned sigh. “Very well, come in,” she said. She opened the door to let him in, and walked through to the small living room of her apartment.
“Sit on one of the wooden chairs, please; I don’t want the couch getting wet,” she told him. “I’m going to change, I’ll be right back.”
He sat down, dripping water on the wooden floor, barely noticing what her apartment looked like; his mind refused to let go of the image that he had seen just moments ago. He just couldn’t believe it. Had those beers hit him harder than he thought? Had he fallen asleep on the subway and was dreaming?
He didn’t have much time to dwell on it as a much dryer Melanie came back into the room, although her hair was still a bit wet. She was wearing a different shirt, a white one with a lower cut. It allowed him to more clearly confirm his earlier conclusion: her breasts were definitely bigger.
“So, I suppose an explanation is in order,” she sighed as she sat down on the couch.
“Let me guess,” Mal said, recalling some of the breast expansion fiction he had read. “It has something to do with you studying bio-engineering.”
“Wrong way around,” she said, giving him a thin smile. “I want to become a bio-engineer because of this.
“I’ve been this way ever since puberty. My breasts absorb water, and grow as a result. Every doctor I’ve been to says it’s impossible, that they can’t explain it, let alone fix it. So I’ve spent the last few years of my life unable to go near water. I can’t go to the beach with my friends. I had to make up excuses in high school to not shower after gym class. And as you’ve noticed, I have to be extremely careful when it rains; I normally never leave the house without an umbrella, but I forgot the damn thing at the lab today.”
“But if you grow when wet,” Mal interjected, “and at the rate I just saw… surely you should be bigger by now. I mean, you can’t have stayed away from water that effectively for so many years.”
“The growth recedes again if I wait a few hours. They shrink faster if I sweat a lot – why do you think I’m so fit? I work out all the time to sweat my breasts back to normal size – and for some reason the sweat doesn’t get reabsorbed so there’s no growth from that.”
“That’s the most amazing thing I’ve ever heard!” Mal exclaimed, looking incredulous.
“Yeah, I know. I’m a freak,” she said. “That’s why I want to be a bio-engineer, so maybe I can fix this!”
“You’re not a freak! You’re a beautiful girl! So you’re a bit unusual, but that’s not a bad thing. Don’t you ever say you’re a freak!” Mal pleaded.
“Oh come on… I know guys like big breasts, but no guy would want some weird mutant whose breasts change size all the time.”
“Don’t be so sure of that. In fact, there’s loads of guys who’d find that very erotic. I’m one of them.”
It was out before he realized it. He was momentarily stunned, but when Melanie didn’t seem to be calling him a pervert and kicking him out the door, he relaxed a little. Instead, Melanie got up and walked to the kitchen. Mal was afraid he’d really upset her or something, but she came back carrying a glass of water, with a strange glint in her eyes. She stood before him, her chest slightly above his eye level.
“So if I do this,” she said, pouring the glass of water over the front of her shirt, “it turns you on?”
The water drenched her shirt, and this one did turn slightly transparent, enough for him to see she wasn’t wearing a bra. He guessed wearing bras would be really impractical for someone whose cup size was in constant flux.
Not all of the water was absorbed, some of it falling down her shirt onto the floor, apparently not having been in contact with her chest long enough. But some of it receded into her skin, growing her breasts a little. And when her breasts touched her shirt, as before the moisture was sucked from the fabric, and her chest continued its expansion. She was now somewhere between a C and a D cup.
Mal was enthralled, and it was some time before he could tear his eyes away to look her in the face. “That was amazing,” he said. If it wasn’t obvious from his face that he meant it, the bulge Mel could see beneath his jeans was enough to convince her that he wasn’t deceiving him. Breast expansion really did turn him on. Mal was afraid that, since she thought she was a freak, she would now think he was a freak for liking it. But it didn’t seem like it. In fact, she looked like she appreciated the positive attention he was giving her breasts, as if it was the first time in her life that had happened.
“How… how fast can they absorb the water?” He asked, faltering because of his excitement. “And how much?”
Mel laughed, arching her head backwards as she did. This had the effect of pressing her chest forward, and the nipples sticking into the fabric of her shirt told Mal he wasn’t the only one getting aroused.
“You mean, how fast can they grow and how big, don’t you?”
Mal just grinned sheepishly.
“Well, you could see they absorb the water at a fixed rate, no matter how fast you poor it,” she said, pointing at the water on the floor. “They grow quickest if the entire surface area is in contact with water, so for example if I’m in the shower or submerged. They’ll grow at three or four centimeters, so between one or two cup sizes, per minute. It speeds up a little as they get bigger due to the increased area, but not proportional.” She blushed as she was speaking, like she couldn’t believe she was actually discussing this with a stranger.
“As for how big, I’ve never tested it. The doctors believe it wouldn’t be dangerous since they always shrink back, but I was always a bit scared of it, to be honest.”
“What’s the biggest you’ve ever been?” Mal asked eagerly. For his part, he couldn’t believe he was having this discussion either!
“About this big,” Mel said, holding her hands in front of her, indicating what looked like the size of small watermelons.
Mal whistled. “Damn, that’s impressive,” he said. He imagined what that would look like on her body, and prayed he would get the chance to see it someday. She would be every tit-man’s ultimate fantasy at that size. “I didn’t think you would’ve gone for quite that large, from what you were just saying. Or was it an accident?”
At that, Mel blushed even deeper.
“The sensation of the growth, it’s kind of… erotic,” she said, avoiding Mal’s eyes. “So sometimes I get carried away, even if I feel bad about it later.”
“Can I try it?” Mal asked, pointing at the empty glass in her hand, feeling bold.
Mel turned a whole new shade of crimson never before seen in nature, but nodded. She went back into the kitchen and returned with a half-liter bottle of water, which she gave to Mal. He unscrewed the cap and was about to start pouring the water on her shirt, when she held back his hand.
“Wait,” she said. Mal thought she was being hesitant about letting him do this, but it wasn’t that. To his great surprise – and delight – she pulled her shirt up over her head, revealing her naked upper body. She was truly a sight to behold; a marvelous figure, fit and lean without being thin, and just the right amount of muscle-tone. Her skin was smooth and soft, and Mal longed to touch it but he held himself back. She would’ve been stunning even with her original B cups, but the expansion had certainly not done her appearance any harm. The enlarged breasts sat firm on her chest, looking perfectly soft and natural. They were capped by perky dark nipples on medium sized areola. And she was about to get even bigger! If Mal’s heart had ever pounded harder he sure couldn’t remember it.
“No stretch marks?” He asked, raising his eyebrows.
“Another thing the doctors can’t explain. Where does the extra skin come from when my breasts grow, and where does it go when they shrink? And not just skin, it’s extra fat and glandular tissue as well; they’re not filling with water, the water somehow turns into real breast tissue.”
Although he was curious, he felt the question of “how” could wait. Besides, if neither the doctors nor Mel-the-bio-engineer herself knew, he probably would never find out.
Nearly trembling, Mal stood up from the chair and tilted the bottle over the top of her exposed breasts. Most of the water fell off her chest, getting her stomach and jean shorts wet. He stopped pouring. For just a few moments, her breasts looked wet, and then they dried up they got just a tiny amount larger. Mal’s heart was stuck somewhere in his throat as he watched, mesmerized, as Mel’s breasts rose and fell with each breath. But they didn’t grow any further.
He tried again, pouring much slower this time. Slowly but surely the perfect globes in front of his eyes got bigger, but not by much. He found it very hard to not spill the water; the shirt had helped, absorbing the water until her breasts could take over. Without it, it was much more difficult to get the water to stay on her breasts long enough to be absorbed.
By the time he finished the bottle, he was disappointed that she had only barely managed to make a D cup. Nevertheless, it was the most erotic thing he had ever seen in his entire life up to that point. Forget the morphs and 3D animations he had seen on the Internet! This was the real thing!
He looked up at Mel’s face again, expectantly, hoping she would let him continue. The look she had was a mixture of embarrassment and excitement.
“You know,” she began, “that was the first time in my life, ever, that I didn’t feel bad about this happening. Sure, I’ve enjoyed the feeling of the growth before, but I’ve never wanted it. Until now.” Then she added softly: “Thank you.”
They looked at each other. Mal stared deeply in her dark green eyes, feeling he could get lost in there forever. He wanted to get lost there, except it would mean he couldn’t look at her breasts anymore, so he didn’t.
Then, without either of them saying anything, both of them deciding it simultaneously, they kissed. Just a brief touching of lips that lasted only a few seconds before they pulled back. Mel looked at him questioningly, as if she was asking him if it was ok. He answered her by pulling her close, hugging her against him, and he kissed her again. This time, it was the most passionate kiss Mal had ever given anyone. Their mouths opened, their tongues exploring each others’ mouths. They pressed close together, and Mal could feel the softness of her body against him, her breasts, her stomach, everything. He also felt her hard nipples poking into his chest. It all felt wonderful.
But then he noticed something strange. His shirt, which was still wet from the rain, was beginning to dry up. Mal opened his eyes, and he could see on Mel’s face that she’d noticed it too, but they didn’t break the kiss. This time, he could not see, but instead felt against his chest, Mel’s breasts growing even larger. If anything, that was even more erotic than watching it!
At long last their mouths parted, and Mal looked her over once again. She was now pushing a DD. She stepped back and posed for him.
“Do you like it?” She said, smiling warmly.
He nodded, and swallowed hard. “Wow… just… nothing else comes close to describing it. Just, wow! You are so beautiful! And I don’t mean just, you know… but the rest too. You’re nothing short of amazing.”
Mel giggled. “I’ve got an idea,” she said. She picked up the empty bottle and went back to the kitchen to refill it. Then, putting the bottle on the living room table, she removed her jeans, revealing her sexy pink panties. She lay down on the couch on her back, and beckoned him.
“If I’m lying down, do you think you’ll be able to get more water on me instead of the floor?” She asked coyly.
Mal walked over to her, taking the opportunity to look at her legs. No wonder he hadn’t been able to catch her earlier, with legs like that. She had said she worked out to shrink her breasts down quicker by sweating. While he disapproved of the reason, he could certainly appreciate the result.
Mal took the bottle and dripped a small bit of water onto her chest. As before, the wetness disappeared and her breasts got a tiny bit bigger.
“Don’t get any water on the couch, now,” she said jokingly.
“You can be sure I’ll do everything I can to prevent that,” he replied. He knew where he wanted that water to go and this time he’d make sure it got there.
He poured more water. Some of it gathered between the valley of her breasts before disappearing, but some ran down her stomach and gathered around her belly button. Although he thought that looked very sexy too, it was not the effect he was aiming for.
“Use your hands,” Mel said.
He didn’t need asking twice. Tipping over the bottle once more, he used his other hand to rub the water into her breasts. They felt soft and warm as he kneaded them. He spread the water from her stomach back to her breasts and he could feel his hand get dryer and her breasts get bigger. He couldn’t believe he was doing this! He had never been more turned on in his life, and he wasn’t the only one, it seemed. Mel’s breathing was getting faster, and when he pinched her nipples she let out the sexiest moan he had ever heard.
“I think I read somewhere that large breasts are usually less sensitive, with the nerve endings spread over more skin, but your breasts seem to be getting more sensitive.”
“The doctors… they…” she moaned. “Can’t explain it,” he finished for her, laughing. Mel, the medical mystery. But he didn’t care; all he cared about was the growing breasts beneath his hands, and the wonderful girl they were attached too.
He leaned down to kiss her again, still squeezing one of her breasts. Then he moved his head in between the two perfect globes. He traced his tongue around the contours of one breast, then the other. He slowly moved inward, licking and kissing as much of the breast flesh as he could, until finally he reached her nipple. He latched on and sucked it, eliciting more moans. As he had expected, he felt his mouth go dry, but very slowly; apparently her skin didn’t absorb saliva as quickly as regular water. The small quantity of growth this caused wasn’t even noticeable, so he poured more water, and he reveled in the sensation of her growing breast as he was sucking it. He got up again, and checked his handiwork. By his best estimate, Mel was now approaching F cup. He emptied the last drops of water out of the bottle. Considering what he’d achieved with just half a liter of water, she sure didn’t need a lot of water to grow; she just didn’t absorb it very fast.
Meanwhile, Mel had begun rubbing his crotch through his jeans, and was now trying to undo his zipper with one hand as her other was inside her own panties. His dick sprang to full attention once freed from its confinement, having reached maximum hardness a long time ago. She sat up, stroking his dick softly, and grinned.
“You know, I’ve never been big with a guy before, so I’ve never been able to do this,” she said, looking excited.
She enveloped his dick with her F cup breasts, lubricating the connection with his pre-cum, and began moving up and down his shaft. Mal was worried it would dry out and become chafing, but fortunately, her breasts didn’t seem to absorb the pre-cum at all.
He groaned; it felt incredibly! She would occasionally switch to put his dick in her mouth, sucking it, and then return it to between her cleavage. He could tell she didn’t have a lot of experience, but she was sure making up for it in effort and enthusiasm. When she wasn’t using her hands to squeeze her breasts together she kept fingering herself, and the slurping and squishing sounds were punctuated by his groans and her moans. Mal regretted that he didn’t have any water anymore. To have her breasts grow around his dick, now that would be something! But he felt that after tonight, there might be more opportunities to live out some of his remaining fantasies.
It took only a few minutes of her ministrations before his dick exploded like never before. Drops of cum splattered the top of her chest. Mal noted sadly that, like the pre-cum, his cum was also not getting absorbed.
“Sorry,” he said, panting. “I couldn’t hold out any longer, this whole situation was just too…”
“Don’t worry about it,” she replied, “I understand. And it looks like Mr. Big here isn’t quite finished for the night.”
She got up from the couch, took his hand, and pulled him into the bedroom. Through the anticipation of what was coming next, Mal had just enough sense left to pick up the bottle, which he’d dropped earlier. When they got into the bedroom, Mel pulled off her panties and jumped on the bed. She looked at him expectantly in all her naked glory, her body glistening with sweat in the moonlight coming from window. Mal furiously hoped she wasn’t sweating enough to start shrinking.
“Just one second, love,” he said, and went into the small bathroom. He came back with the water bottle fully filled again. He put it down on her nightstand, and then removed his clothes.
“Come on, hurry,” she pleaded, moaning. “I can’t wait any longer. I want to feel you inside me.”
“Are you sure?” He asked; he had planned to first return the oral she had given him, but as she vigorously nodded in reply he decided otherwise. He picked up his pants from the floor and reached into the pocket to remove his wallet. He took the condom that had been in there ever since his break-up several months earlier and quickly put it on.
He climbed on top of the bed, leaning over her, and kissed her again, teasing the entrance of her pussy with his dick. “Put it in,” she moaned.
Before he obliged, he took the bottle, spread some more water over her chest, and replaced the bottle on the nightstand. Then he began thrusting into her, watching her wobbling breasts expand a little more. He wanted to grow them more, but he needed his hands to keep himself propped up as he moved in and out of her. Even her pussy was amazing, and Mal was sure he’d have another orgasm again soon. But he was determined to hold out until she came, or die trying.
After a few minutes, they shifted positions. Mal lay down on his back with Mel on top. Her breasts bounced freely, slapping into her stomach and occasionally even hitting her chin. She leaned forward a bit to let him fondle her massive mammaries.
“They’ve… never… felt… this… good!” She panted in between moans. She tried to say something else but her ability to form a coherent sentence was decreasing with her increasing pleasure levels. Unable to articulate her request, she simply pointed at the bottle, and Mal picked it up from the night stand behind him and gave it to her.
She tried to get more water onto her breasts while not stopping her bouncing up and down on his shaft. It wasn’t very successful, and Mal and the bed received more water than her breasts, but her job was eased a little by their already formidable size. Despite quite a bit of the water going to waste, they still grew a bit, leaving F behind and heading towards the G range. But unfortunately, they ran out again. Mal made a mental note to get a bigger bottle next time.
Not long after, Mel screamed out in orgasm, and the convulsions of her pussy sent Mal over the edge again too. Mel collapsed onto him, squashing her breasts onto his chest, taking a minute to recover from the waves of pleasure coursing through her body.
Mal held her gently, and when her breathing slowed down a bit, he whispered into her ear: “Do you still want to find a way to stop them growing.”
“I don’t know.” she replied, looking content. “I think maybe… it has some advantages… that I had previously overlooked.”
Mal woke up the next morning when the sun was already blazing through the windows. It looked like it would be another scorcher today. He remembered how Mel and he had made love several more times, although they hadn’t grown her breasts any further. He remembered it, but he didn’t believe it. It had to have been a dream. Breasts that grow when wet don’t exist in the real world.
But when he opened his eyes, he saw not his own bedroom, but Melanie’s. And next to him he felt the soft body the most amazing girl he had ever met. It hadn’t been a dream after all.
Mal pulled back the covers a little, looking at the sleeping beauty. It reminded him of how he had first seen her, asleep in the train. Of course she hadn’t been sleeping naked then, like she was now. Never would he have guessed he’d end up here that time last night. He also saw that her breasts had shrunk back down to their original B cup. Even with small breasts Mel was absolutely gorgeous, so he didn’t mind so much. Besides, he thought, there was one advantage to shrinking breasts; they could grow them again, as often as they liked.
Softly he got up from the bed, careful not to wake Melanie. He went into the bathroom to go to the toilet… and to get some water.