After five years, I returned home to find my younger sister grown up and greeting me in a miniskirt and knee-high socks with her panties showing. She would show off her naked body in the bath, masturbate, and even have sex with her boyfriend, knowing full well that I was getting hard. 'Actually, I want to do it with you, big brother,' she said. Unable to resist my sisters' temptations, while the family is away, I'll give them a thorough sex education with my dick.
