Slavery: A series of erotic games (book 01)
So much for slow and gentle.
"So, finish your explanation. You were saying." I rocked out and in again, thrusting my hips up.
"I had a married girlfriend tell me she never sucked her husband's cock," she moaned, "ever. If he wanted his cock sucked, she said, the Hoover Vacuum was in the hall closet. Myself, I liked sucking your cock, but I denied you the pleasure of swallowing your cum because it was icky. 'Good girls' don't swallow cum. We can't enjoy it that much. It's not right. It's immoral. Fuck my ass, sir. You're going to make me cum again."