JYMA-050 While my wife was pregnant and visiting her hometown, I had sex with my sister-in-law who came to help with housework. Horikita Miku

Three years after we got married, my wife became pregnant. Her wife said she would give birth at her parents' house, so she decided to return home. I thought it was okay to be single for the first time in a while, but then my wife's sister came to help her with the housework. I met my sister-in-law for the first time in a while and she seems cute, and her figure is nice and attractive, so even though I don't think she's good, I still see her as a woman. I don't feel at ease when I think of being alone in the same house. At that time, I saw my girlfriend's sister-in-law masturbating, and I couldn't resist and approached her. After that...