Then John grunted under Pam, fucking up into her cunt like a maniac. He was on fire, seeing his wife get her asshole feed with cum by his young nephew. He heaved his ass high, thumped his big cock into Pam's guts and blasted jism into them. The sticky jism was already running back out of her cunt and ass, slopping down on to the rumpled bed sheets.

Donna went limp, skidded off Pam's sweaty back and onto the bed, moaning. Rubbing her cunt, she watched her son pull his cock out of Pam's ass just as Pam fell forward on her face and her pussy popped free of John's prick.

Donna reached a hand out and jacked on John's cock until John bent over her and began finger-fucking her locked pussy. Donna felt her sister watching them, knew that Pam could see her getting ready to come again. But it would be around Pam's husband's pussy-fucking fingers, this time. She bucked her ass up and down until her cunt started spasming off, in less than a minute. Then Donna grinned over at Pam as she showed the staring wife how much her pussy could soak John's hand.

Donna jacked John all the way off, then. She had him pumped so hot and hard already that she milked a big load out of his cock in just a few more quick strokes. Pam looked surprised that her husband's prick could drench Donna's hand with so much jism after spurting only minutes before. Donna then slid over to her sister, held her hand out, and allowed Pam to lick the cum off her fingers.

Now Pam's daughter called everyone's attention to a new fuck that had started on the floor when no one was watching.

"Look!" Suzy said, pointing to the rug not far from the bed. "Skip is fucking his sister again. They're dog-fucking! Really humping to get their rocks off. Let's watch."

Donna looked. It always amazed her, how excited she got watching her son and daughter fuck each other. Hunching wildly, they were certainly enjoying it this time. And they were definitely dog-fucking.