Stepsister interrupts me while I pleasure myself with her underwear

As I was indulging in some self-pleasure, I discovered my stepsister's panties. I couldn't resist the allure of her scent and began to stroke my throbbing member with her lingerie. Just as I was on the brink of ecstasy, she unexpectedly stumbled upon me in the act. Her initial reaction was one of shock, but soon her arousal took over and she eagerly joined in, her tight ass eagerly accepting my throbbing member. Our passionate encounter left me drenched in her sweet nectar, a testament to her intense orgasm. This was a steamy encounter that left us both thoroughly satisfied.