Chapter 1

Kenny had known from the start that having a slime girl as a girlfriend was going to be an experience unlike anything he’d ever known, but he had no idea just how much of an experience it was going to be. The good thing was that the experience was an enjoyable one in every aspect, especially his sex life.

He also knew that slime girls had a nearly insatiable appetite for sex in any and all forms and were experts at it, but he had drastically underestimated just how intense and insatiable that appetite could be. His slime girlfriend Cindy had shown him quickly just how much he’d underestimated her, and she continued to show him every chance she got – which was averaging out to twice a day for at least an hour and a half each time. If it weren’t for the as-yet unidentified chemical in the slime that composed Cindy’s body and was readily absorbed through Kenny’s skin by physical contact Kenny wouldn’t have been able to keep up. This chemical not only gave him the stamina he needed but also enabled him to maintain an erection for hours at a time, achieving back-to-back orgasms for as long as the erection lasted, pumping out the same quantity of cum each time. And his erection would last as long as the chemical was being produced, which only took place while Cindy was aroused. It was easy to tell when she was aroused and producing the chemical because it smelled like strawberries. Once her needs were satisfied and her arousal sated her slime stopped producing the chemical, and Kenny’s erection would quickly fade away, leaving him physically exhausted.

Another thing that made having a slime girl as a girlfriend different was her size. Slime girls were bigger than humans in every way. Cindy stood almost seven feet tall with a voluptuous body, something that Kenny personally found arousing. Her waist and thighs were thick, her butt was rounded and full and her breasts were nothing short of massive, capped with equally massive areolas and nipples. Her breasts were nearly twice the size of Kenny’s head, and she was able to wrap them around his head and swallow it up completely if she wanted to. And considering that slime girls were able to change the density of their bodies at will, when she swallowed up Kenny’s head with her huge slime tits she did exactly that, merging her two big breasts into one massive one, completely enveloping Kenny’s head and cutting off his air in the process. The first time she did this to him Kenny nearly suffocated, unable to breathe inside Cindy’s one massive breast. After a few moments of him frantically slapping her on her upper arms with his hands she separated her breasts and freed him just in time, and ever since then she’d been very careful not to suffocate him like that again.

Like all slime girls Cindy’s body was partially transparent, which meant that whenever they had sex Kenny was able to watch the blurry shape of his cock as it was inside her. This was especially interesting when he came, being able to watch his cum as it shot out of his cock inside her pussy to be quickly absorbed by her body. As it turned out, while slime girls couldn’t get pregnant by human sperm their bodies needed the protein it contained, feeding on it instead. This was one of the reasons that their sex drive was as high as it was – they’d starve to death if they didn’t absorb human sperm. They didn’t eat food like humans, so sperm was their only source of nourishment, and since the only way their bodies could absorb it was internally, sex was the only way they could feed.

The other reason for their insatiable sex drive was that they simply enjoyed having sex. They enjoyed it a lot.

She was also blue. Slime girls were either green or blue, and Cindy was blue. A very pleasant, not too dark shade of blue, but blue nonetheless.

They had met in college, with Cindy being an exchange student from a land he’d never heard of, the sparks flying between the two of them from the moment they met. When Kenny saw her for the first time she was wearing a form-fitting white ribbed tank top and a pair of dark blue jogging shorts which were also form-fitting. Her big, voluptuous body was barely able to squeeze into the desk where she sat, her big, rounded breasts resting on the desktop. Slime girls were very direct, always saying what they were thinking and meaning what they said, and Cindy was no different.

“Hi, I’m Cindy,” she had said to Kenny as soon as she saw him, a big smile on her face.

“Hi, I’m Kenny; nice to meet you,” he said, holding out his hand. Cindy took it with a big smile on her blue face.

“You’re cute,” Cindy said, holding onto his hand as she spoke. “I like you!” she said, her smile getting bigger.

“Thank you, Cindy, I think you’re pretty cute yourself,” he said, partially to be polite but partially because he meant it. Cindy was incredibly cute to the point of downright pretty, and Kenny felt himself drawn to her. When she finally released his hand he went to a desk and sat down, the two of them looking over at the other for the duration of the class.

After the class was over Kenny was in the cafeteria eating his lunch when Cindy came over and sat down in the booth across from him, her big, voluptuous body barely able to fit in the booth as in the desk in class. Her big, rounded breasts inside her shirt slid across the top of the table as she slid across the bench seat, finally stopping when she was sitting directly across from him. Then she looked up at him and smiled, her yellow eyes shining as she put her arms on the table and clasped her hands together in front of her, pushing her huge blue breasts together and creating about a mile of cleavage for Kenny to drool over. In typical slime girl fashion, Cindy got right to the point without so much as a ‘hello.’

“I want to have sex with you,” she said, her smile never wavering, never taking her eyes from his. Kenny almost choked on his soda at her words, picking up a napkin and wiping the soda from his chin.

“I’m sorry, you kind of caught me off guard,” he said, returning her smile.

“I’m sorry, Kenny, I didn’t mean to do that,” she said, meaning it.

“It’s okay, Cindy really,” he said, stealing a look at her huge tits pushed up between her arms ad they rested on the table. He finished wiping his mouth and chin, folding the napkin and putting it on the table before he looked up and spoke again.

“Now what were you saying?” he said; he’d heard her the first time but was at a loss for anything else to say, so this was the best he could do.

“I said I want to have sex with you,” she repeated, still smiling.

“Uh huh,” he said, pausing. “I’m flattered, but why me?” he asked as he brought his soda up to his mouth to take another drink, genuinely curious.

“Because I think you’re cute like I said before, and because I think you’re very sexy and probably have a very large penis,” she said, making him choke on his soda again.

“Damn, Cindy!” Kenny said, looking around quickly while he wiped his chin again.

“Do you have a large penis, Kenny?” she asked innocently. “I just love human males with a large penis!” she said, her smile never fading.

“Let’s go someplace where we can talk about this in private, okay, Cindy?” he said, finishing his soda and starting to get up from the booth.

“Okay. Let’s go to my room where we can talk and then have sex!” she said, sliding out of the booth to stand in front of him, towering over him with her huge breasts almost level with his face.

“Sure, why the hell not?” Kenny said, smiling at the prospect of having sex with a slime girl for the first time. When they got to her room they talked for all of sixty seconds before Cindy had Kenny stripped naked and lying down on the bed on his back while she sucked his cock to an intense, mind-numbing erection. Sixty seconds after that she was also naked and riding his cock hard and fast, grinning and laughing the whole time.

And she was pleased to discover that she had been right – Kenny did in fact have a large penis. Eight inches worth of large, and Cindy just loved it.

By the time Cindy was done with him that first time he was so exhausted that he couldn’t move. He didn’t leave her room until nearly six o’clock the following morning, after having had sex with Cindy almost non-stop for the rest of the day and most of the night. Thanks to the chemical in Cindy’s body he was able to get hard and stay hard whenever he needed to, cumming a total of ten times with each load of cum being just as big as the first – and his first load was huge, again thanks to the chemical Cindy produced. Cindy’s body absorbed it all, and she was sleeping soundly when Kenny staggered from her room.

When he got back to his room he collapsed onto his bed and slept for 12 hours straight.

That was three months ago, and to be honest Kenny couldn’t have been happier with how things were working out. Aside from being a sensational lover, Cindy was also a genuinely nice being, always happy and smiling, always trying to make him happy – and always ready to fuck his brains out at the drop of a hat.

Like now. They had moved into an off-campus apartment a month after they first met, and both had part-time jobs to pay the rent. Tonight was Kenny’s night off while Cindy had to work, and he knew what was going to happen as soon as she got home from work. She was going to be both hungry and horny, and there was only one way to satisfy both needs – and Kenny was ready for it. As ready as he could be, anyway. He was in the kitchen fixing himself a glass of tea when he heard Cindy come in.

“Kenny! I’m home!” she called out, slamming the door behind her. It sounded like she was in a really good mood tonight, and Kenny knew from past experience that meant she was very hungry and very horny, and that he was going to get a first-class fucking.

“In here, Cindy!” he called out, putting the container of iced tea back into the refrigerator. He didn’t hear Cindy walk into the kitchen and had no idea she was standing right behind him until he turned around and bumped into her massive blue breasts. She immediately threw her arms around him and leaned over to kiss him, her big, soft blue lips pressing against his. Cindy’s lips were full and soft, and Kenny loved the feel of them wherever she chose to put them. He put his arms around her and hugged her back as the kiss deepened, her blue tongue sliding into his mouth as she squeezed him closer to her. He began to sink into her body, her massive breasts sliding around his neck, and he would have been pulled completely inside of her body if she hadn’t been wearing clothes. That had happened a couple of times before when Cindy was on top while they were having sex, and she fell forward to lay on top of him. The experience was both exciting and frightening at the same time.

“MMMMMMMMM!” Cindy moaned as she kissed him, sliding a hand down his body to find the lump of his cock in his pants, gripping it and squeezing it as she kissed him. She moaned again when she felt it growing hard under her hand, squeezing it harder in return. Kenny slid his hands down to her full, rounded ass and gripped both cheeks in his hands, squeezing them hard and feeling his fingers sink into them. A few moments later she broke off the kiss and stood up straight, her breathing a little faster now.

“Let’s go have sex!” she said, a big grin on her face, her yellow eyes wide and sparkling with excitement. “I want to feel your big penis inside me very badly!” she said in typical slime girl fashion. Cindy never cursed or used obscene language; Kenny didn’t know why, but he actually found it both a pleasant change and amusing at the same time.

“Fine by me!” Kenny said, returning her smile. Cindy grabbed him by the hand and led him out of the kitchen and into the bedroom, pulling him behind her. She was really worked up tonight, so Kenny knew that he was in for quite a ride. As soon as they got to the bedroom Cindy stripped out of her clothes; since she worked as a telephone customer service representative, she could wear whatever she wanted to work, so tonight she was wearing her usual attire of a tank top and a pair of shorts. She was naked in a matter of seconds, her mammoth breasts bouncing on her chest as she turned to face Kenny, a huge grin on her face. The sheer size of her breasts, areolas and nipples never ceased to amaze him, and Kenny could feel his cock growing. He had just pulled his t-shirt off over his head and dropped it on the chair next to the door and was reaching for his jeans when Cindy reached out and grabbed him by his upper arms.

“C’mere, you!” she said as she yanked him towards her, burying his face between her massive blue breasts and wrapping her arms around him, holding him tightly up against her. She closed her arms tighter to push her breasts together against his face, and Kenny felt the two massive blue globes merging into one, swallowing up his entire head. He managed to take a deep breath before his nose was covered, so he was able to hold out for a few moments as Cindy squeezed him harder, rocking her shoulders back and forth with his head encased inside her merged breasts.

‘She’s in rare form tonight!’ Kenny thought to himself, feeling his cock beginning to grow hard faster, tingling a little as it grew. This was the sign that Cindy’s body was producing that special chemical and that it had already gone to work on him. Cindy felt it too, giggling as she spoke.

“Oooooh, I feel your penis getting hard!” she said, her voice muffled by her breasts covering his head. Kenny held out for a few moments longer, then patted her firmly on her hip with his hand, the signal for her to let him go. She took her arms from around him and Kenny pushed his head back, up and out from her merged breasts, taking a whooping breath as her breasts resumed their normal form. Before he could recover completely Cindy put her hand on the back of his head and shoved it against one of her breasts, her big, hard nipple pressing against his mouth. This was her way of telling him that she wanted him to suck on her nipple so he did, opening his mouth and clamping his lips around the big nub, sucking on it as best as he could.

“Mmmmmmm, that feels good!” Cindy moaned, pushing his face against her breast harder as she reached down to grab his now fully erect cock through his pants. She squeezed it hard, pulling and tugging on it as Kenny sucked on her nipple, squeezing the other big blue globe with his hand as he did. He got the faint taste of strawberries in his mouth as he sucked on her nipple; this was the taste of her special chemical, and almost immediately Kenny felt his cock getting harder and throbbing as Cindy gripped it in her hand.

“I want to suck on your penis now!” Cindy said, taking her hand away from the back of his head and releasing his cock from her grip. She grabbed him by his upper arms and picked him up, then turned around and tossed him onto the bed as easily as if she were tossing a small child. Slime girls were very strong, especially when they were sexually aroused, and Cindy had learned to be careful not to hurt Kenny when they were having sex. As soon as he hit the bed Cindy reached down and grabbed his jeans, quickly getting them open and yanking them down over his hips and down his legs. He wasn’t wearing underwear (as usual) and Cindy squealed with glee when she saw his big, hard cock spring out, her yellow eyes sparkling, a big smile on her face.

“Let me move up a little,” Kenny said, quickly moving upwards to the center of the bed. Cindy dropped his jeans and climbed onto the bed as he moved, lying on her stomach between his legs and moving up with him. As soon as he stopped she grabbed his cock in her hand and lifted it up, opening her mouth and dropping it down onto the hard shaft. She clamped her soft lips around it and sucked hard, her cheeks hollowing in from the suction she was applying. She swirled her blue tongue around the head for a moment, then moved her hand out of the way as she pushed her mouth all the way down onto his hard cock, easily taking all 8 inches of it. Slime girls didn’t have a gag reflex, so this made oral sex very enjoyable for both her and Kenny.