Kyoko lives with her husband and son. Recently, her son has been in a rebellious phase and particularly defiant towards his father. Kyoko loves both her husband and son equally and was worried, thinking 'I wonder what's wrong?' One day, Kyoko had sex with her husband for the first time in a while. Even after menopause, she is extremely sensitive and can't help but let out moans. Unaware that her son is peeking... The next day, as Kyoko masturbates while reminiscing about their lovemaking, her son returns home. Excited by seeing his mother masturbate, the son attacks Kyoko! She tries to resist, but when her perfectly ripe G-cup breasts are groped, Kyoko's body ignites...
