Hitomi has always regretted that she had eased her loneliness without her husband by having sex with her own son. From that day on, her son began to desire Hitomi's body whenever he had free time. His son would seduce Hitomi even when her husband came home, and before long he began to enjoy thrilling situations, trying to make Hitomi cum when her husband wouldn't find out. Hitomi resisted at first, but she began to feel pleasure from cumming in these situations...