Forbidden Ch. 01

"Holy crap sis, you're tight" Kevin moaned, grinding her chest against hers as he pumped deeper and deeper into her. He could feel her soft walls squeezing his prick slightly, rhythmically, as he finally felt the end of her passage and his sack slapped against her ass.

"I never imagined you'd be so big or so strong" his sister whimpered beneath him. She gripped his face and made him focus on her, and he stopped thrusting. "I have to tell you something. I've wanted you inside me for a long time, because I just love you so much, Kev."

"I've wanted you too" Kevin admitted, which was true. Madison's breasts had already developed by the time he became interested in girls. He could still remember the first time he came, imagining he was hilt-deep in his sister. Now it was no longer a dream...almost.

Kevin began driving into his sister again. He was getting to the point where he had to choose where to cum. His few minutes of jacking had been intense and had worn him out a bit, not to mention the overwhelming eroticism of fucking his own big sister.

She kissed him and began rocking against him, his pelvis slapping against hers again and again. He could feel their sweat and juices dripping down his balls as they began constricting.

The three shared a bathroom, so he knew that neither one had used a tampon in two weeks, but he also saw a pack of birth-control pills sitting on the top shelf of the medicine cabinet, behind some of Madison's perfume. Though, if he had gone so far as checking inside, he would have realized that none were disappearing.

"Fuck Maddie, I'm going to cum" he warned. "What should I do?"

"Me too—OH!" she moaned, clenching her eyes.

Instead of responding to his question, she wrapped her arms around him. One pulled him down to her as she kissed him passionately, while the other grabbed his ass and helped him plunge deeper into her. Her pussy was clamping down on him and the friction was just too intense for him to bear.

He drove once more into her, and didn't pull out. He felt all his attention and sensation build up and center in his loins as his balls pulsed. She was just starting to come down from her orgasm when he felt the first shot of his searing hot spunk shoot out of his dick and splatter deep inside her. She began cumming hard on his rod as they felt jet after jet fire out of it, filling her womb with his gooey seed.

"Mmm" they mouthed into each other's lips. He pushed his tongue into her mouth and explored it, then began kissing her once more.

"I love you so much" he murmured, his cock still plugging his sticky cum inside her, allowing all but a bit to be sucked even deeper inside. As his dick softened, he pulled out and watched a bit of semen dribble out of her.

They both got up and walked to his room, where they slept that night. No one would notice them coming out of the same room if they got up while Laura was in the shower. It gave Kevin the opportunity to spray two more loads of cum deep into her fertile body, completely unaware of the waiting egg inside her.

END

This story is my first attempt at what I refer to as 'smut'. I usually write science fiction, and I'm a bit of a purist, but I thought 'what the hell' and wrote this. I was kind of bored, so this is sans editing.

So please let me know what you think!

My name is Jonas. My e-mail can be accessed via the CONTACT tab on my profile if you want to say something nice, or if you have constructive criticism regarding my work.