Synopsis for
The Insatiable (2006)

Harry Balbo (Sean Patrick Flannery), a shy salesman, witnesses a violent killing by a female vampire who rips the head off her victim. But when nobody believes the story, Harry decides to track her down before she strikes again. Upon finding her, he is seduced by her beauty and cannot kill her. Instead, he captures and imprisons her in a cage in his cellar. Now a prisoner, she must convince Harry to feed her, or she will slowly die. Not wanting to kill her, and not able to release her, Harry is faced with tough choices. He starts out by getting her live rabbits and advances to humans, and finally himself.