Three years had passed since our marriage, and my wife became pregnant. She said she would go back to her parents' house for the delivery. I thought maybe I could enjoy single life again, but my wife's younger sister came to help with household chores. It had been a while since I last saw my sister-in-law; she had grown bigger breasts and looked more mature and attractive. Though I knew it was wrong, I couldn't help but look at her as a woman. The thought of being alone with her in the house made me uneasy. Then, one day, I caught her masturbating, and I couldn't hold back any longer. From that point on…
