Cindy flopped down on the couch, slumping back, her little ass almost hanging over the cushion. She spread her slim legs wide and began to play with her cunt.

Kathy could hardly believe what was happening. Robert was sprawled on the floor, his loincloth to one side, caressing his cock and balls, and his sister was sitting there playing wit her cunt. They looked at her with steady eyes, seeing every part of her exposed tits, thighs and tight panties. Kathy was glad they had not stripped her panties off. As it was, her tits being naked was bad enough.

"I think we made Kathy hot," Robert said, stroking up and down his cock with one hand and squeezing gently at his balls with the other. "I think Kathy has a hot cunt, too."

"Do you, Kathy?" Cindy asked, unabashedly shoving a finger up her cunt. She worked the finger in and out of her pussy, lifting her small ass to meet it. "Do you have a hot pussy, too? I like having a hot cunt. I play with my cunt all the time when Robert is gone, but when we're together, we play with each other. You wanna see him play with my cunt, Kathy?"

"I bet we made her come off in her fucking panties," Robert said. "I bet Kathy came watching."

"I did not!" Kathy snapped, knowing she was lying. "I did not come!"

Robert grinned at her. He sat up and then leaned forward. He shot his hand between her thighs and rubbed at the crotch of her panties. "You sure as hell did come, you liar! Either you came off or you pissed in your panties."

The flush that flooded Kathy's face told him all he wanted to know. He laughed and moved to where his sister was. "We're gonna make you come again," he said, running his hand between his sister's thighs. Kathy could not stop herself from watching.

Cindy grabbed her brothe's cock and beat up and down on it with a tight fist. Robert grabbed at her puffy, almost hairless cunt, tickling his sister's hard clitoris and making her squeal with delight. He thrust a finger into her cunt and began to fuck it in and out. Cindy twisted and rolled her hips with pleasure, mewling softly as she stared at Kathy.