I had to stay at my wife's parents' house for a week. When I saw my sister-in-law Rio again, she was always in her unguarded state at home, and I was at a loss for what to do with my eyes. Things changed between us after Rio went out drinking with friends. I ended up letting her rest at a business hotel after she got drunk, but seeing her seductive appearance, I couldn't control myself... From then on, Rio and I hid from my wife and indulged in intense, creampie sex like loving lovers...