"Ooooooh!" Cindy mewled as her brother's cock slipped up her cunt. "Oh, golly, golly that's good, Robert! Ahhhh! I love your cock in my cunt!"

Kathy's breathing increased hotly as she saw Robert's cock thrust all the way into Cindy's almost-hairless cunt. She saw his balls, slap against her creamy ass. Robert held himself up so Kathy could see, and she knew that they were making sure she saw it all. She could not help it when her own cunt throbbed, soaking her panties even more. She trembled with the steaming pleasure of watching them, wondering why it was all happening in the first place.

Robert's naked ass began to bounce up and down, and Kathy stared hotly at his cock as it stabbed in and out of his sister's cunt. Cindy wiggled her ass, thrusting her cunt up and down to meet him. She whimpered with the pleasure she felt, and her hands dug into his hips. She tossed her and ass about in a wildness that was transmitted to Kathy. Kathy had the odd sensation that she could feel Robert's cock driving deep into her own cunt and she knew she would come again in a short while.

"Oooooh, Robert!" Cindy gurgled. "Ooooh, it's so hard! Your cock is so hard inside my cunt! Golly, fuck my pussy, Robert! Fuck my cunt with your hard cock!"

Kathy was certain Cindy's words were intended to inflame her. If that was her purpose, then she was succeeding. Kathy's cunt was burning and throbbing and she could hardly stand it. Her clitoris was brushing the crotch of her panties and making it tingle until she thought she would go out of her mind.

She could hear the moist sounds Robert's cock made as it thrust in and out of Cindy's young, tight cunt. She found herself leaning forward to try and see better. The sounds increased her shivering sensations, and her eyes were wide open as she stared at them.