A wife returns to her parents' house to give birth. I'm living alone for the first time in a long time, and I'm going crazy. My wife's sister came to my house whether I knew it or not. "Brother-in-law... Aren't you trying to deceive?" When I couldn't hide my discomfort in front of my sister who suddenly followed my core... "I'll handle it for you so that your brother-in-law doesn't cheat..." hand….