Kyoko lives with her husband and son. Recently, her son has entered a rebellious phase, showing strong defiance toward his father. Kyoko loves both her husband and son deeply, and she worries about his changing behavior. One day, she finally shares an intimate moment with her husband. Even post-menopause, her body remains highly sensitive, moaning passionately as pleasure overwhelms her—all without knowing her son has seen everything. The next day, while recalling that night and masturbating alone, her son returns home. Seeing his mother in that state excites him, and he suddenly attacks. Though she resists, as he gropes her mature G-cup breasts, Kyoko's body begins to burn with arousal.