In her mid-fifties, the mother has a youthful, firm body and is energetic, and has repeatedly cheated on her husband to satisfy her brimming sexual desire. The son, outraged by his fifty-year-old mother's infidelity, develops abnormal and obscene feelings towards his mother. The son gets an erection by teasing her ripe pussy, thinking that she can't resist cheating on him with a stranger. The fifty-year-old mother sucks her son's strong, grown-up dick hard, knowing that it is forbidden, and becomes addicted to intercourse with her son.