Surprising cumshot inside my stepsister's vagina after rubbing her underwear and clitoris

After a steamy shower, I was surprised to find my stepsister's panties on the floor, leading me to her bedroom. As I went to investigate, I caught her pleasuring herself on the bed, her underwear barely covering her. I couldn't resist the urge to join her and we soon became entangled in a passionate encounter.Despite my initial surprise, I found myself getting turned on by the sight of her. I began to rub her underwear, teasingly close to her wet folds. The sight of her glistening arousal was too much to resist, and I found myself inside her, thrusting with wild abandon. The sensation was overpowering, and I couldn't hold back, filling her with my hot load. The sight of her dripping cum was a testament to our shared pleasure, leaving us both breathless. It was an accident that led to an unforgettable experience, leaving us both satisfied and yearning for more.