Smiling at him, Betty straddled his loins on her hands and knees, with her hot dripping cunt poised just above his stiff-standing cock. Bracing her hands against his chest, she slowly lowered her slippery pussy. Excitedly grasping his hard cock, she guided it into the deliciously hot wetness of her pussy as she lowered it further down over his throbbing cock.

"Oh, you sweet shit," she passionately whispered, feeling his cockknob gliding into her until it was completely embedded in her writhing belly.

Whimpering with excitement, she began moving up and down over the delicious hard-on.

Increasing the tempo, she was soon pumping wildly up and down over his throbbing prick, her lush tits jiggling and bouncing in front of his eyes.

"God, Sis," he panted. "You sure know how to fuck a guy."

Bouncing faster and faster over his big blood-engorged prick, she was letting out little squeals of joy with every downward plunge as his prick pounded deliciously against the very end of her pussy. Bill's hard cock was glistening with the hot, slippery juices that were flowing from her frothy cunt as she continued fucking up and down on his glorious cock. Almost out of his mind from the intense pleasure he was feeling, Bill was thrusting his hips up to meet every downward plunge of his sister's juicy little cunt.

"That's it, honey!" she squealed, bouncing more urgently on his rigid cock. "Fuck, baby, fuck! Oh, shit, it's so fucking fucking good!"

The room was filled with moans, sobs and squeals as their hot naked flesh slapped wetly together.

"Ooooooooohhh!" screamed Betty as she began tensing for a wild climax. "Fuck, baby, fuck! I'm almost there! I'm gonna come!"

Just as she was about to reach her orgasm, she felt his hot cum gushing into her ready-to-explode pussy.