Kate and Nick had always been close. Literally always, they were even together in the womb. They’d been inseparable best friends since they were born. Katie and Nick did everything together. They were on the same baseball teams, they were in all the same classes, they did their homework together, they were even applying to the same colleges. They couldn’t go to two different schools…they couldn’t be apart.

At seventeen years old, one might think they’d grown sick of each other or even had the normal sibling rivalry but they were still as close as ever. They definitely resembled each other, both tall and slim with dark brown hair and brown eyes. They were both attractive, they had good genes from their parents. Katie was developing into a very attractive woman, her breasts were getting larger and her hips wider. Nick couldn’t really help but notice his sister wasn’t looking much like a kid anymore.

Neither of them had ever really dated before, there just wasn’t time for that. They’d had some distant boyfriend/girlfriend types that you only said hi to in the halls at school, but never even the first kiss type. It was strange for everyone around them, because they were both really popular in school.

They weren’t saints though, Nick had discovered the wonders of pornography and masturbation years ago. He found that he’d be scrolling through pages and pages of pictures and video and nothing was good enough. He didn’t know it right away, but he was looking for women who reminded him of Kate. It was never right though, they weren’t what he really wanted.

Kate on the other hand, she’d been experimenting as well. She started touching herself more and more as the years went on. At first it was innocent, but after a while she could hardly do it enough to satisfy herself. She found her mind wandering more and more when she was really involved, and she often found herself thinking about Nick. She liked to pretend he was touching her, kissing her, and it was enough to drive her over the edge.

It was one of those days, and Kate was in a particularly horny mood. She’d been sitting by the pool in the back yard, when Nick had come out to go swimming. He was wearing those baggy grey swim trunks he was always wearing. She was always laughing at him, telling him those fit him two years ago but he needed an upgrade. Nick was too lazy to go shopping though, and he always pointed out he only needed it for a few months of the year and it was only in their back yard so why bother?

She’d never mentioned it was because when he got wet those shorts were practically see-through. It wasn’t that she really minded the free show…but she had to really try not to look. Nick had a good amount to look at too…it drove her crazy. She wondered if he did it on purpose.

He didn’t, he was really pretty oblivious. Nick really was just too lazy to buy a new bathing suit. Half of the reason he even went swimming was because it made it easier to get a look at her in her bathing suit. She had a lot to show off too, and her breasts were barely held in by the thin yellow bikini top. When she decided to actually go in the pool it was even better. Either way he got to watch her tan.

After she couldn’t stand it anymore, Kate ran up to her room to shower and change. She made up some quick lie about having to finish some homework, and left Nick in the pool. He was disappointed to see her go, unaware she really planned to run upstairs to touch herself. He would probably do the same in a few minutes. They had the house to themselves, their parents were over their neighbors for a cookout they’d conned their way out of going to.

Kate didn’t actually shower, that was just an excuse to kill time. She did turn the water on, however, in case Nick needed to be fooled. What she really did, was pull the bikini off and climb up onto her bed. She laid down, spreading her legs open to expose her virgin pussy. She was dripping wet, she’d been able to tell that. She put her fingers down to run against her exposed slit. She moaned, closing her eyes and imagining it was Nick’s tongue caressing her.

Meanwhile, Kate was totally unaware that Nick had come back into the house. He had no idea what Kate was doing, hearing the water running he imagined she was in the shower. He was picturing her naked body under the running water, and his cock was instantly getting hard. He didn’t know why he did it…but he had the sudden awful idea that he wanted to masturbate right outside the bathroom door while she was inside. The idea of being so close to her when he did it was exhilarating, and the chance he might get caught even more so.

He quickly pulled his swim shorts off, already soaking wet, and tossed them in the hallway’s hamper as he passed by. He reached her unlocked door and slowly pushed it open not wanting it to make a sound just in case.

He was expecting to creep into the room and go towards the bathroom, but instead he froze. Kate was laying there on the bed with her legs spread wide open. He could see everything, her dripping wet cunt, her round breasts standing up on her chest, her fingers slowly fondling her swollen clit. His cock twitched at the thought of spreading those exposed cunt lips wide open and sliding inside of her.

She didn’t know he was there, he’d been so quiet. She was moaning softly, moving her hips up and down as she imagined Nick touching her.

He was transfixed. He slowly reached his hand down to stroke his throbbing dick. He couldn’t help himself. He’d come in just to be close to her, to imagine her naked body, and here it was for him to see. He knew it was wrong, but he couldn’t stop himself. He stroked his dick slowly as he watched her rubbing feverishly at her sopping wet cunt.

Then she said it, “Oh, Nick,” she moaned. It wasn’t that loud, but he’d heard her.

Moaning his name? He stopped what he was doing,and he thought for a minute. Was she…fantasizing about him?

Slowly he took a step forward, coming to stand right at the end of her bed. She was so close to him now. She was completely unaware, still lose in her fantasy world and growing ever closer to another orgasm.

Nick couldn’t help himself anymore, he knelt on the bed to bring himself closer to her. She felt the movement, and by the time she opened her eyes, he was already kneeling in front of her exposed pussy.

“Nick!” she gasped, as he stuck out his tongue and lapsed up her flowing juices. She moaned, arching her back in response. Nobody had ever licked her before. She’d imagined it one hundred times, but it felt so much better than she had anticipated.

Nick didn’t say anything, not sure how she would react, he wanted to get as much of her as he could. He loved the way she tasted, and he stuck his licked her pussy again.

Kate didn’t know why she didn’t stop him…she knew it was wrong, but it felt so good. She put her hand down to grab the back of his head, arching herself into him. He kept licking her, kissing her swollen cunt and sucking gently on her clit. He’d seen it down enough times in porn movies that he had an idea of what to do.

Kate laid back against the bed, moaning as she could feel her brother’s mouth all over her cunt. She was soaking wet now, it was going all over her and onto her thighs. She gasped as an orgasm game over her. She let out a low scream, grabbing Nick’s head and pushing herself harder down onto him. She’d never had an orgasm like that before, it was mind blowing.

He kept licking her throbbing pussy until he couldn’t take it anymore. He knew she’d orgasmed, and now he wanted to have her. He pulled himself up over her, pushing his mouth down onto hers and kissing her hard. She could taste herself on his tongue, as he quickly ran his over her own. She moaned into his mouth, arching her back against him.

He put a hand down to grab at her exposed breast, greedily groping for what he’d been staring at and imagining for so long.

He positioned his cock between her legs, and pressed it against her dripping wet cunt. She was so wet, he slipped trying to get in.

“Nick,” she gasped, “we can’t.”

“Why?” he asked her.

“Because…it’s wrong.”

“I don’t care,” he said, thrusting again as his cock slipped against her. He grunted, he wanted to be inside her so badly it hurt.

“What if people find out?” she gasped.

He thrust again, and this time he got the right spot. He could feel her opening up for him slowly as he pushed himself inside of her. She let out a primal sounding moan, and he did the same. He leaned over her, having her pinned completely under his body.

It was too late now…they couldn’t take it back.

He thrust into her slowly, aware that if he went too quickly he was going to cum. It felt so good, so much better than anything he’d ever felt in his life. She was so tight on the inside, squeezing his cock with every thrust. She could feel it too, the way he was pushing the walls of her virgin cunt open slowly.

“You feel so good, Kate,” he moaned. He was picking up his pace, he couldn’t help himself she just felt so good. He wanted to fuck her so hard it hurt.

She was screaming in pleasure, writhing beneath him but he had her pinned down so he had her right where he wanted her.

“Yes,” she screamed, “Nick, yes, fuck me harder.”

He was thrusting into her so hard, slamming his cock in and out of his sister’s tight cunt. It felt so good it was all he could do not to explode right away. He lasted as long as he could, before he finally couldn’t take it anymore.

He felt himself cumming. She could feel the warmth inside her as his hot cum filled her. He kept thrusting, not wanting to give up even a second of how good it felt to be inside her. Finally he had to come down, and slowly he slowed his thrusting until he stopped.

He collapsed onto her, his breathing heavy. She was panting too, and she didn’t know why because she hadn’t even moved. She could feel his sweat against her naked skin. His cock was still twitching ever so slightly inside of her. She could feel the cum dripping out around him, running down her ass and onto the white sheets of the bed.

He picked himself up after a moment to look at her. He kissed her on the mouth, and she kissed him back. They both knew that they were never ever going to tell anyone about what had happened. They both knew it was going to happen again…but it was going to stay their little secret.

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