She pushes open the bedroom door and sees her husband's head busy between the au pair's wide-spread thighs. The young girl is moaning loudly, her back arched above the rumpled sheets. His hands are squeezing her small breasts hard, making her big rust-red nipples pop out even farther. 

"John! What the fuck do you think you're doing?" 

He looks back over his shoulder, his mouth glistening with cunt.

"Just trying to give Juliet a little pleasure, honey," he mumbles sheepishly. 

"I can see that, you greedy bastard! You know she's mine on Fridays!"