PRED-240 While my wife and I were bored, I was seduced by Yuki (sister-in-law) and ended up ejaculating over and over again... Yuki Takeuchi

My wife went on a trip alone. As the relationship between the couple grows colder, he becomes unable to resist the temptations of his wife's younger sister, Yuki... ``Anyway, my sister...she's having an affair while I'm on a trip...'' The more I think it's no good, the more my sanity is blown away... During the day, night, and morning, while my wife was away, I had intense sex with Yuki and ended up ejaculating over and over again...I felt immoral.