My Sex Diary: The Day My Gentle Man Turned Evil

One day, he stumbles upon a DVD that contains a video of his wife and a man having sex. He's puzzled, but he can't stop watching the video. Why is tha man having sex with my wife? The man, who is ill, comes up with an idea to continue filming his stepson having sex with his wife until he left. He puts his wife on bed, takes her, and films the whole thing. He then uses it as a story to further...