JYMA-050 - While my wife is pregnant and visiting her parents' home, my brother-in-law had sexual intercourse with his sister-in-law, Horikita Mirai.

It's been three years since I got married, and my wife is pregnant. My wife said she would give birth at her parents' house and went back to her hometown. I was thinking that maybe a solo life would be okay for a while, but my wife's sister came to help with housework. My sister-in-law, whom I hadn't seen in a long time, was cute and had a good figure, and she was attractive. Even though I knew I shouldn't, I couldn't help but look at her as a woman. I felt uneasy just thinking about the two of us being alone in the same house. At that time, I saw my sister-in-law masturbating and couldn't resist approaching her. After that...