Amid constant marital conflicts, Sakiko took action as a mediator between her daughter and son-in-law, arranging a discussion in hopes of reconciliation. Wishing for her daughter's happiness and eagerly anticipating the day she would meet her first grandchild, she sincerely desired to restore the family's bond. However, during the discussion, it became clear that she had inadvertently aroused her son-in-law. Devastated by the revelation, Sakiko is soon approached by him when her daughter isn't looking. Trapped in an unthinkable relationship, she wavers between anger and desire. As her duties as a mother clash fiercely with her feminine instincts, her heart continues to tremble with inner conflict.