A son and his wife start living with his lonely stepfather. Unbeknownst to them, the stepfather is a big fan of large breasts, and the full-time housewife Leonah goes about her days unguarded. Her ample chest unintentionally stimulates the stepfather's lower half; seeing him struggle to hold back, Leonah plots to seduce him in order to get him to buy her brand-name goods. Unable to resist Leonah's provocative behavior, the stepfather makes a mistake. Once unleashed, the stepfather forgets that she is his son's wife and relentlessly pursues his carnal desires.
