"Come on, Becky," he groaned. "Suck my cock!"

Julie sat with her legs wide, watching and listening. Ben's shorts dangled from her mouth as she fondled her naked tits with both hands. Now and then Ben would glance between his mother's thighs, arching his cock up and trying to get his sister to suck it. But Becky was having fun jacking him off, holding his balls, and she wanted to take her time.

But Julie didn't want Becky to take her time. She wanted to see her daughter suck her son's cock, to make him come in her bot little mouth. The idea of Becky sucking a cock off, her son's cock, so she could watch, sent chills of wild pleasure through her. Seeing was almost as good to her as doing.

"Come on, Becky!" Ben groaned. "You've jacked me off enough times! Suck it for me! If you don't start sucking, I'm gonna come off in your fucking face, Becky!"

"Oooo, would you?" Becky gurgled. "I'd love that! I'd love to feel your jizz in my face!"

"Suck me, you fucking little cunt!"

"Ooo, what you called me!" Becky moaned. "Well, you are a fucking little cunt," Ben said. "And I won't fuck you ever again if you don't suck me off."

Julie laughed, a low, lewd sound. "You better start sucking him, Becky," she said hotly. "He might mean it."

Becky squealed, and gulped her brother's cock into her hot little mouth. She sucked on the cockhead, still jacking her fist up and down it, squeezing his balls. Ben squirmed his naked ass on the floor, trying to stuff his throbbing cock into his sister's mouth. Becky lifted her head each time he pushed upward, but kept the smooth head of his cock in her lips. She lapped across his piss hole, licking up the juices that bubbled from it. The way the cock juice tasted sent a rippling ecstasy through her sweet cunt.

Julie couldn't sit and watch any longer.