Robert was twisting his ass about on the floor as his sister jerked his cock. He was grunting now.

"Ohhh, golly, I'm gonna come, Robert!" Cindy suddenly squealed. "I'm gonna come! You come with me, Robert! I wanna feel your cock coming on my cunt when I come!"

Cindy yelped with intense delight and her body shook. Kathy was amazed that she could see the tight pucker of Cindy's asshole flex. The creamy sweetness of Cindy's ass seemed to tighten up, and then Kathy saw the come juice spurt from the piss hole of Robert's cock. The come juice gushed and drenched his sister's cunt, some of it falling down onto his balls.

Kathy licked her lips, straining against the ropes. She was leaning forward, trying to get down there. There was a desperate desire burning through her slender body – she wanted to be with them as they came. Her cunt was having erotic spasms as her dark eyes turned glazed with erotic intensity.

She leaned back against the chair when Cindy lifted herself from her brother. Cindy held her fringed skirt above her waist, the come juice of his cock smearing her pussy and soft inner thighs.

With a giggle, Cindy cupped her cunt with one hand and left the room, going to the hall bathroom.

"Did that make your cunt hot, Kathy?" Robert looked up at her, fondling his cock and balls. "Didn't that make you want some of my cock?"

Kathy remained silent. She tried to glare at him, but all she could do was stare at his cock and balls. She was not about to admit her excitement, that she had come when he squirted onto her thighs, then came again watching what they had just done.

Cindy came back, and this time she had removed her dress completely. She gave Kathy a sweet, innocent smile when Kathy's eyes went wide.

"I like being naked," Cindy said. "I like being seen, too. I like to jack Robert's cock off and make him come on my cunt."