Yuu has been married to her current husband for two years. Her husband has a child named Takashi. Takashi seems to love Yuu's firm buttocks, and whenever his father is away, he touches her buttocks. At first, Yuu resists, but one day, she lets Takashi touch her buttocks as much as he wants, and then he uses a dildo on her to make her cum. Yuu is excited by the taste...