Looking at his cock, Kathy felt something strange sparking through her body. She was not a virgin, and her interest in sex was more intense than most girls. Now, seeing Robert's cock hard and swollen, with a very smooth head that was dripping, she gazed at it as though unable to take her eyes off it. His cock was not enormous, but certainly of a respectable size. There was fuzz at the base, but his balls were hairless, much larger than she would have suspected. She was surprised to feel a sudden twitching of her cunt. To her horror, she found that her cunt was becoming quite wet, and her clitoris swelled into a burning, hard knot. She moaned softly in her throat when she realized she was getting excited, too.

Cindy looked at her brother's hard-on with bright eyes. Without saying anything, she reached over Kathy's thighs and grasped Robert's cock. Kathy stared as Cindy's small fist gripped it tightly and started to pump back and forth.

This couldn't be happening, she thought. Surely she was having a wild dream. She wasn't really tied up securely, her tits exposed, dress high, and watching this sweet-looking girl jack on her brother's hard cock!

But Kathy knew she was not dreaming, that it, was actually happening. And she was not dreaming that her cunt was burning now, her tits swelling with desire, and her asshole tightening. She was not dreaming that she was seeing this girl jack off her brother.

Kathy shivered, not wanting to feel the pleasure of anticipation that flowed through her. She did not want this excitement she felt. With her eyes half closed, she watched Cindy's fist move back and forth on her brother's cock. She watched as his cock-head became larger. She listened to his soft moans of delight as his sister jerked him. His cock brushed her thigh, and, she watched the piss hole leave a trail of hot moisture along her creamy flesh.