Jason heard something like a grunt coming from his sister's room, but he wrote it off as nothing. He took off his shirt and sweats, leaving only boxers, and slid into bed. After a few minutes, he wasn't at all surprised when his hand found its way into his boxers.
He stroked his cock softly, remembering the way his sister, Brit's, ass looked in those tiny little shorts all afternoon. The way her tits had bounced inside that sports bra she had been wearing.
When he had called her out on her sexy outfit, she had just laughed and rolled her eyes, totally unaware of the effect she had on him.
He felt himself growing and he knew the boxers would become uncomfortable soon.
He heard that noise again from Brit's room, and this time he got up to investigate. He put his ear to the wall they shared and his eyes widened when he heard loud breathing and the occasional whimper.
He quickly stripped off his boxers and took his cock into his hand again, listening to Brit pleasure herself. This is so wrong, this is so wrong
, he chanted inside his head. Then he heard another one of those hot grunts and couldn't help but feel that it was so right.
"Mm, oh, Jason, yeah, Jason, lick me, eat my pussy," she moaned.
Jason jumped back like he had been burned.
She was thinking of him? Picturing him inside her head while she stroked her tight little pussy.
Well, he would have to do something about that.
Without thinking too much about it, he marched over to her room and swung open the door. She gasped and tried to cover herself up, but he spoke before she had the chance.
"Do you want me?" he demanded, cock swinging and fully erect. Her eyes kept going between his face, dick, and abs. Finally she nodded.
"I can't hear you, slut," he said, taking a step forward.
She swallowed and he could tell being called a slut turned her on.
"Yes, I want you."
He smiled and hopped onto the bed, fisting his dick.
She immediately got into a downward dog position, ass in the air, and took his dick into her mouth.
She moaned around it, sending vibrations through Jason's whole body.
"That's right, Brit, suck your brother's dick. Take it all."
She took the whole thing into her mouth, gagging only slightly before recovering.
"My turn," he said, pushing her onto her back and shoving his face into her pussy.
He ate like a starving man, fucking her pussy relentlessly with his tongue and then flicking her clit several times. He grabbed her ass cheeks and pulled them apart, baring her pussy and asshole to him. He rimmed her with one finger while fucking her with another. His tongue and lips still worked her clit, sucking, nibbling, licking, flicking. Bringing her to the ultimate orgasm.
Right before she came, though, he pulled back and climbed over her.
"Ready, sis? Are you ready to take your big brother's dick like the little slut you are?"
She nodded eagerly and he shoved into her to the balls, causing her to cry out from pleasure.
"What a good girl, taking all of your brother's dick, do you like that?"
"Yes, yes, mmm, Jason, give it to me harder," she whimpered, bracing her hands above her head while Jason continued to rail her. The whole bed was moving back and forth with Jason's thrusting, and both were letting out grunts and cries like wild animals.
He pounded into her like a mad man, not slowing down until they had both exploded. When they did, it was violent. Jason let out a roar as his cum shot into her, his body no longer moving rhythmically but wildly thrashing. She was shaking below him, her legs shooting out and her hips gyrating wildly, trying to find some anchor to the feelings coursing through her body.
He collapsed next to her, breathing heavily, and offered her a smile.
"Thanks, Brit. I might use you again sometime."
He leaned over and kissed her chastely on the lips.
"You're a good fuck, sis. I'll remember that. I'm gunna go to sleep now, though."
With that, he got up and left, leaving her staring after him.
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<a href="http://www.lushstories.com/stories/incest/thin-walls.aspx">Thin Walls</a>