Beautiful stepmother Saki Mizumi has a lovely face and a perfectly mature, luscious body. One day, she discovers her son secretly took her underwear before laundry and used it to masturbate. Watching him in awe, she notices his penis still erect as he pretends to sleep. A lewd desire stirs within her. Smiling seductively, she teasingly approaches him, strokes his cock, and grinds her wet pussy against it. She then performs oral sex, coaxing him toward climax. Overcome by raw lust, she spreads her pussy wide and takes his cock deep into her mouth. In that moment, their forbidden relationship takes a dark, passionate turn.