I had been catching him looking at my butt for a long time. Maybe I shouldn't walk around the house in my panties when stepdaddy is around. Once when the step-mommy went to work and we were having breakfast, he complimented me. I didn't think what it would lead to. He promised that he wouldn't take my virginity and it would be anal only. I realized that I couldn't resist him. At first it was rough but then...