After my parents remarried, I, who had been in a male-only household, got a stepsister around my age. Having a female family member nearby was a bit too stimulating for me, and as a result, I used the sight of her in her panties to jerk off. She caught me doing it. The atmosphere suddenly became awkward. As she watched me get scolded and sulk, my stepsister suddenly offered to help me with my masturbation?!
