"I'm gonna make you come, Robert." Cindy giggled in a lewd manner. "I'm gonna jack your cock and make you come, okay?"

"Damn right!" Robert grunted, arching his hips forward so his cock was above Kathy's thigh.

Kathy felt Cindy's hand brushing at her aged, flesh as she stroked Robert's cock. Cindy pressed her brother's cock against her flesh. The feel of his prick against her skin was very hot, and a thrill of pleasure caused her cunt to twitch. Kathy could not look away from the erotic sight of a sister jacking her brother's cock off. It was made more erotic because Cindy looked far too sweet and innocent, her big blue eyes shining with excitement. To Kathy, Cindy should still be playing with dolls instead of cocks.

Cindy was now rubbing the head of her brother's cock on Kathy's thigh, mewling as she smeared the dripping juices on her flesh. Cindy shoved Robert's cock upwards, the pre-cum that was soaking Kathy's skimpy panties. Cindy pulled the waistband of Kathy's panties away again and tried to shove Robert's cock into them. That didn't work, though, so she went back to rubbing the head of his cock on Kathy's thigh, pumping at it frequently.

Kathy could feel the throbbing of his cock against her flesh, and she tried to still the rumbling desire that was making her tremble. Her gaze followed his cock everywhere Cindy rubbed it and her thigh was now slippery with juice. She was breathing fast now, hotly, and her eyes shined with the deep, inner excitement that she wanted to conceal.

Her tits rising and falling with her heavy breathing, Kathy squirmed her ass against the chair. Her hands were tied behind her, and her ankles were bound to the legs of the chair. She couldn't do more than wiggle. She tried to tell them to stop this silly game immediately, but the words were only in her mind. Her mouth was open, and her tongue moved about, but she wasn't saying a word. Her eyes gleamed hotly as she watched Cindy move his cock up and down on her thigh, then without a word, the two moved behind Kathy.