Tales from the Crypt - Season 5 Episode 13 Till Death Do We Part Dead-On Humor and Horror.
Overview: A male escort is engaged to an aging woman. One day she discovers him flirting with a younger woman. She forces him to kill her in front of her. Instead he kills off her bodyguards, but he is even more surprised when the young lady turns against him. It turns out he's been fantasizing the whole thing and bumps her off himself.