One day, Reiko asked her son to "pick up the laundry" and go shopping. My son picked up Reiko's pants and smelled them. I remembered the couple's business that I secretly saw last night. That night, my son smelled my mother's panties and masturbated. I heard a voice when my son left the room. When I looked at him gently, Reiko was masturbating. The next day, Reiko was cleaning. My son was excited when he saw Reiko's butt and remembered masturbating. My son, unable to bear it any longer, attacked Reiko...