Tara and I were making love. It was a Thursday night and about a month since I'd cum all over her sister's face and tits. My blackmail had worked in a faithless and uninterrupted way and by the time Tara had returned from the grocery store Courtney and I had both cleaned up and pretended like nothing had happened (Courtney did spend the rest of the weekend glaring at me when her sister wasn't looking, but that was normal). I had promised Courtney I'd return her ill-gotten money the next time she visited, and I'd meant it. Four weeks later Courtney was coming to visit us in Chicago, ostensibly to...