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One day, Reiko asked her son to "take in the laundry" and went shopping. My son picks up Reiko's pants and smells them. I remembered the work of the couple I secretly saw last night. That night, my son sniffed my mother's panties and masturbated. I hear a voice when my son leaves the room. When I looked at it gently, Reiko was masturbating. The next day, Reiko was cleaning. My son gets excited when he sees Reiko's ass and remembers masturbation. My son, who can no longer stand it, attacks Reiko...