Saneaki HORIKITA, a brother-in-law who gave sex to his sister-in-law, came to help with household chores when his wife was pregnant.

Three years after the marriage, his wife was pregnant. My wife said she would give birth at her parents' house. After a long time, I thought that single life would be the same, but my wife's sister came to help me with housework and so on. My sister-in-law after a long time seems cute, has a good style, is attractive, and I think it's bad, but I see her as a woman. I don't feel comfortable thinking of myself alone in the same house. At that time, I saw my sister-in-law who was masturbating and couldn't stand it. then...