One day, when her son's friend came to visit, the boy couldn't take his lustful eyes off Mari, his friend's mother, whose beauty carried a seductive charm. His intense gaze stirred something deep within her, sparking forbidden fantasies involving her son and his friend. Even after the guest left, Mari's body remained burning with desire, leading her to indulge in masturbation in the bathroom. By chance, her son witnessed his mother's secret act—sending shockwaves of confusion and turmoil through his mind.