The stepson is forced to live a life of abstinence in preparation for having children. After overhearing the conversation between his cohabiting daughter and son-in-law, Sakae learns that her stepson is frustrated with sexual desire. She unexpectedly proposes, 'Should I secretly take care of it for you?' Having lost her outlet for sexual desires after her husband's death, Sakae herself is also sexually frustrated. She couldn't hold back in front of the imminent explosion.
