Unprotected anal penetration in my stepsister's tight rear end

I was lounging on the couch when my step-sister sauntered in, her face flushed with embarrassment. It turned out she'd been caught in a compromising position with her boyfriend, and she needed a new babysitter for her kids. Being the understanding guy I am, I agreed to fill in. As I settled in, I noticed a pair of sexy panties on the bed, a clear indication of her boyfriend's presence. I decided to take a peek at her ass, and to my surprise, it was even more enticing than the panties. I couldn't resist the urge to explore further, and as I slipped my middle finger into her tight hole, I realized just how much she loved anal. What followed was an intense session of bareback penetration, leaving her screaming in ecstasy as I filled her asshole with my cum. It was a wild ride, and I'm still recovering from the experience.