"Me too."

They were both perspiring freely. His belly slapped hers and at one point she raised her legs and wrapped them around his back. Each time he thrust into her, she came that much closer to coming.

The little brunette had never felt so turned on. This was so much better than masturbating. Her body felt alive and tingling and urgently in need of release. Her orgasm was a hairsbreadth away and when it came she knew it would be intense.

"Fuck me, Billy," she moaned.

"Jesus, you drive me crazy when you say that."

His cock rammed into her. "Fuck me hard like that," she cried.

Her pussy gripped his prick and her words inflamed him. The fire in his groin became almost unbearable. Clenching his teeth, he held his breath in an attempt to delay his orgasm.

"A man is supposed to satisfy a woman first," his father had said to his sons when they began developing sexually. "A real man never comes until the woman is ready. Remember that, boys, and you'll be okay."

Billy remembered his father's words now. "I'm ready, are you?" he said to his sister.

"Yeah, almost," she said. "God, you're in so deep."

"Tight snatch!" he muttered, pounding her cunt with every ounce of his strength. "Such a tight snatch!"

He forgot his father's teachings as the fire in his loins erupted. "Gonna tear you apart," he rasped.

"No!" she shrieked. "Don't hurt me!"

He stopped thrusting. "Jesus, I'm sorry, Sis! Should take it out?"

She tightened the grip of her legs on his back. "No. Fuck me hard again. I'm going to come soon."

She tossed her head from side to side as the glory of her orgasm surged through her. Billy groaned, gazing down and watching her ecstatic face.

"I'm coming, Sis!" he cried, stabbing his erupting prick into her spasming cunt.

The girl cried out when the first spurt of jism exploded inside her. His cock streaked in and out of her, drenching her and bringing her off again. At the end he thrust more slowly, shivering and shaking as his orgasm abated.