After my wife, Takako, became pregnant, my mother, Mika, came to Tokyo from our hometown. She helped with cooking, laundry, and other household chores, but our relationship deteriorated. One day, she even forbade me from masturbating. One day, two days, a week… Mika didn't see me suffering, so she gently touched my genitals and said softly, "I won't forbid you; let me help you, okay?" From that day on, my mind was filled with Mika. One day, while cleaning, I felt a desire for Mika's buttocks…