Sumire, delighted by the rare visit from her daughter and son-in-law, eagerly offered to relieve her son-in-law's travel fatigue using the massage skills she'd acquired from her job. As she massaged him, she became acutely aware of his unusually large crotch, sending waves of arousal through her body so intense she nearly lost consciousness. Waking late at night, she sensed someone in the living room and quietly approached—only to discover her son-in-law masturbating. The sight of his massive cock made her pussy throb with wet desire. The next day, while giving him a full-body massage, her husband and daughter left the house, leaving the son-in-law fast asleep. Overcome by uncontrollable lust, Sumire could no longer restrain herself.