Blackmail Sex Is The Best Sex. I knew my step-sister, Melody, had been sneaking out all the time, this time I was gonna bust her. I wait in her room in my underwear knowing at any minute she is gonna crawl through her window. As I was about to give up, I hear the window slide open and sure enough, there is my step-sister coming through the blinds. I tell her if she wants me to keep my mouth shut Melody is gonna have to fuck me, why else would I be waiti...