Chiaki, a housewife with a voluptuous body in the prime of her womanhood, received a sailor uniform from her husband who was away on a business trip. She was trying it on, looking forward to playing with her husband who would soon be home, when her son Satoru, who lives next door, came to visit. Satoru was excited by the sight of the mature housewife in a lewd sailor uniform and approached her. Chiaki, with her strong sexual desire growing, surrenders to Satoru's actions, opens her mature pussy, thrusts out her big ass, and rejoices in the intercourse with Satoru!