Watching my stepmother's big ass while she does the dishes leads to some self-pleasure

I've always been a bit of a voyeur, and my stepmother's got a big ass that I just can't help but stare at. The other day, I found myself watching her as she did the dishes, my eyes glued to her ample derriere. But that's not where it ended. As I continued to ogle, I couldn't resist the urge to touch myself, imagining what it would feel like to fuck her. I started to masturbate, my hand moving in rhythm with my thoughts. When my stepmother noticed, she gave me a stern look, but I could see the hint of arousal in her eyes. This only made me harder, and I continued to pleasure myself until I came all over my hand, my seed dripping onto the kitchen floor. It was a wild experience, one that I'm sure my stepmother won't forget anytime soon.