Incestuous [silence] Incest. My father is next door...

Maki is a family of three with her husband and son. Until recently, they were a normal, ordinary family, but ever since Maki has recently learned a special fetish that she cannot tell anyone about, that relationship has become a thing of the past. Her fetish is to have sex with her son Takashi even though her husband is right next to her. Being pushed up by her son while suppressing her voice becomes the ultimate pleasure for Maki...