Imaginary Friend is a 2012 Lifetime television movie starring Lacey Chabert, Ethan Embry, Amanda Schull, and Ted McGinley.
Emma is a talented artist haunted by the presence of a childhood imaginary friend called Lilly, which she created as a way to protect herself from her father's abuse, who killed her mother before committing suicide.
Her husband, Brad, a psychiatrist, uses this imaginary friend from her childhood to drive her mad, so she may be committed to a mental institution, staying married, but with free access to the trust without the burden of a wife.
One review states, "an expertly built climax and conclusion that make it easy to say you should give it a chance, even if the toned down nature sounds like a deal breaker to you.
"[1] Radio Times called the film a "seemingly average TV movie transformed by an entertaining climax", noting that the last act was "surprisingly enjoyable".