While my wife was away at home giving birth, I was enjoying a relaxed single life. I had been interested in my wife's younger sister, Aya, for a while, and I couldn't help but look at her with erotic eyes... My sister-in-law is frustrated after breaking up with her boyfriend... While my wife was away, I had incestuous creampie sex with my cute sister-in-law at home! "If you don't have sex with me again, I'll tell my sister..."