“Billy! Oh, my God, Billy! Get up here and put your cock in me before I explode!” demanded Joan.
Billy only worked faster, jamming his tongue into her steaming twat only to jerk it back out and slip it up to bang against her clit while his fingers teased the tender, slick flesh around her cunt and ass. His eager cock was fully erect and he was sure his lubricating juices were dripping from its tip but he liked teasing his sister.
Not since they were children playing doctor had he even considered fucking his sister. Back then they had only a rough idea of what screwing was all about and he had taken his cock in his hand and ran the head up and down through Joan’s pink slit but there had been too much friction and neither of them realized that it was actually supposed to go inside her. They’d decided it wasn’t all it was cracked up to be and by the time they learned better they no longer played nude together. They had been told it was wrong.
Now Billy let his mouth slip from her drooling cunt and go up through her curly bush and along her abdomen, leaving a mixture of saliva and pussy juice on her smooth skin. He sealed his wet lips around her belly button and sucked, sticking his tongue into the indentation.
“Hurry up and put your dick in me! Fuck me, NOW!” cried Joan.
Billy raised his head. “You’d better hold it down or Mom will be in here and then all you’ll get is in trouble for being in my bed.” He put his lips back down around her belly button and slid them up across her stomach and between her tits.
Joan tried to reach for his cock but he twisted away from her.
“Give me your cock, Billy! I’m burning up!” she whispered with anger in her voice.
“Okay, Sis. I was just teasing.” He got up on his hands and knees. “Guide me in.”
She wrapped her slender fingers around his bursting cock and pulled him to her, guiding the head of his prick between her juicy cunt lips. As he pressed toward her his slick cock slid into her slippery cunt without resistance. She caught her breath as his full length slithered into her tight twat tunnel. Her legs went up around his waist and pulled him down tight against her.
He lay there for a few moments, straining against her even though the full length of his cock was already buried in her cunt. At last he pulled back, three inches of his rippled shaft sliding out of her clutching pussy. She jumped and quivered and a sound of surprise escaped her lips.
“What’s wrong?” asked Billy.
“It feels funny coming out, like it was sucking my insides out or something.”
“Different from other guys?”
“I haven’t had other guys.”
“If you haven’t had other guys, how’d you loose your cherry?”
“I busted it a long time ago.”
“How?”
“Come on, and fuck me, Billy. We can talk later.”
“Nothing doing. How’d you loose your cherry?”
“I was fucking myself with Mom’s douche gun and I pushed it too hard. Now will you shut up and fuck me?”
Billy didn’t answer. He simply pushed his cock into her again and drew it back slowly, half expecting her to cry out or pull away. Instead he felt her legs go back around him and one of her arms went around his neck while the other slipped up under his arm and around his back.
“Oh, my God. I never knew it was this good. I feel my pussy juice building up so much, I think I’ll turn wrong-side-out when I come.” Her hips came up off the bed to meet him when he started down again. She swayed as she brought her hips up and he could feel her titties rolling against his chest.