Say you'll cooperate
From Create Your Own Story
"Good. Very good." He gives your breasts a straight stare. "Are you on the pill?" he asks.
"N-no," you stammer.
"You'll have to take care of that. As fast as you can. Any delay, and you'll be punished." His cold glare makes you quail.
"Yes, of course," you reply with partly forced eagerness, realizing this might get you out of sex today. "May I go, then?"
"Huh?" he looks confused, then, "Oh, I get it. No, of course not. You have a long evening ahead of you. Call your parents and tell them you're staying over with a friend." He pulls you over to a table with a phone on it.