Five years have passed since we got married, and my wife got pregnant. She said she was going to give birth at her parents' house and decided to go back home. I thought that living alone for the first time in a long time might be Ari, but my wife's sister came to help with the housework. When I met my sister-in-law for the first time in a long time, she was beautiful and had an adult appeal that was stimulating, and even though I knew it was wrong, I couldn't help but see her as a woman. I couldn't calm down thinking about the two of us being alone in the same house. One day, while I was peeking at my sister-in-law masturbating, our eyes met, and from then on, we did something forbidden...