True fact: female sexuality is more fluid than men's. So no matter how straight she *thinks* she is, she'll eat pussy if it pleases you, and she'll love it.
Torn between humiliation and supreme pleasure. It's not even physical. She just loves to see him happy so much, she loves knowing he's pleasuring himself in her ass. It's even better than she feels used and degraded.
She was leaving for college. But her best friend, now roommate, would take care of her for you. You knew what this meant, but you loved her anyway. You only asked if she could keep her laptop open so you could see.