Not My Ass! Unplanned Anal Pushes Me to My Limits

I borrow a stranger's car and end up stuck at the parking column. Luckily, it was just a minor mishap, but I still have to confess. My stepfather took it in stride and joked that I could fix it another way. So, I invited him over and, with a wink, suggested he could collect my debt. He was the one who looked surprised when I got serious, took off my clothes, and made myself comfortable on the swing. With my legs spread wide, he could see deep into my most intimate areas, and my already wet pussy awaited his hard cock. He fucked me harder and faster, until it happened. He slipped out and actually pushed his cock into my extremely tight and unstretched asshole. Fuck, that was intense and painful—completely unplanned! But my moans didn't seem to bother him, and he continued to fuck me in the ass without comment. Was this all part of his revenge for the scratch? At least he didn't hesitate to push me deeper and harder, while I struggled more and more. What an incredible boundary-pushing experience—it really gets me going when I think about it. Would you have been so shameless as to fuck me in the ass like that?