"Fuck me back, Trisha." Ralph squeezed and kneaded her bare white ass cheeks, smiling as he watched her big tits jiggle up and down. "You know how to do it. Pump your ass, like I'm doing. It'll feel even better then."

Trisha humped her ass. At first she screwed a little awkwardly, finding it difficult to meet the strokes of her brother. But the sensations were so delicious that it didn't take her long to catch on. Less than a minute later, she was fucking Ralph's throbbing dick as if she'd been doing it all her life.

"That's better now, isn't it, little sister?"

"Awwww, Ralph, unhhhhgggghhh…" Trisha humped harder and harder, pulling herself up until only the knob of her brother's dick parted her tight cunt lips, then slamming her wet fuck hole all the way over his prick again. "That is good, that's so fucking good… play with my… unhh… play with my titties, they need it, oh please, I'm gonna cum!"

Ralph raised his hands to his sister's breasts. Tenderly he milked the swollen, spongy globes, making Trisha cry out loud with her heat as he squeezed her big tits. Ralph pinched her nipples, then pulling the rubbery tips out almost viciously as he continued to hammer his rigid cock again and again through the clinging sheath of her pussy.

Trisha couldn't stand it. The feeling in her breasts seemed to merge with the gurgling wetness in her cunt, making her hornier than she'd ever been when jerking herself off. She just had to do something to make herself cum.

Trisha leaned over her brother's body, her full tits dangling and swaying across his chest as he squeezed them, planting her hands onto the bed next to his shoulders for support. Then she started fucking him hard and fast enough to break the mattress, violently reaming out her aching, burning cunt with the satisfying stiffness of his cock.