Hush... Hush, Sweet Charlotte (1964) - She Is Deranged

Bette Davis (title character) realizing her cousin Miriam (Olivia de Havilland) doesn't plan to help save her Louisiana plantation home, reveals the role she played in the murder of her married lover to old family friend Dr. Drew (Joseph Cotten), in Robert Aldrich's Hush... Hush, Sweet Charlotte, 1964.