"Faster, Billy, faster!" she shrieked. "God, it feels so fuckin' neat!"

"Yes, Billy!" shouted his big sister as she began excitedly fingering her own clitty beneath her nightie. "Just fuck the piss outa her!"

When the boy suddenly increased the speed of his thrusts, Penny almost passed out from the flaming pleasure of it.

Her pussy was being thoroughly drilled by the boy's plunging cock and her tight young cunt slit was creaming all over the length of his streaking cock. Penny was screaming and clawing at the cushions as the boy continued his vigorous assault on her virginal pussy. God, she was so happy that Billy's big sister was teaching them how to fuck!

"Fuck her! Fuck her!" screamed Heather, frantically rubbing her own cunt.

Penny could feel his slashing cock pumping her pussy to the brink of orgasm, and she began hysterically screaming as the intense ecstasy swept through her writhing body. The girl was suddenly at the very height of her wild climax when Billy's prick exploded. Writhing beneath him, the girl felt his white-hot jizz gushing into her cunt.

It was several minutes before the two exhausted young adults recovered from their traumatic experience.

"Well," panted Heather who'd brought herself off at the same time the kids had, "what do you think of fucking?"

"Crazy," grinned Penny. "It's super!"

"And don't ever forget it," said Heather as she turned to leave the room. "Fuck as often as you can. There's nothing in the world that's as much fun as fucking."

"Heather," Penny called out to the older girl. "Billy's prick is all soft."

"Cocks always do that after they shoot their load," explained Heather, returning to where the naked young adults were spread out on the couch.