Houkai Kazoku 2 after

A man is escorted by a yakuza member into a room equipped with a one-way mirror. Through the glass, he is forced to watch his pregnant ex-wife, Rina, having sex with another man named Kenya. Despite his deep humiliation, the man becomes aroused by the sight and masturbates while observing them. Adding to his despair, Rina reveals that she intentionally became pregnant with Kenya's child. She confesses that she only slept with her ex-husband as a decoy to cover up her ongoing infidelity.