SMOM-007 Shin: Abnormal Relations 5 — Mature Mother and Son, Part 5: Embraced by Her Stepfather and Torn Between Her Son’s Affection, a Sensual Mature Mother in Turmoil — Reiko Yamaguchi

Kiyo (Reiko Yamaguchi) lives with a husband who is away on a long-term work assignment and rarely comes home. Her son has also shut himself away in his room. Kiyo begins consulting her father-in-law about family matters. Although he encourages her, she gives in to loneliness and sadness. One day, she confides her frustrations about her husband to her father-in-law. Comforted by his kindness, the two are drawn together and end up crossing a line. Her son secretly watches the scene from the hallway. Later, he confronts Kiyo, hurling insults at her before attacking her. He then calls her into his room and makes her promise to do anything he asks, forcing her into increasingly degrading acts.