What is the name of Jane Hudson's abusive sister in the film "Whatever Happened to Baby Jane?"

The name of Jane Hudson's abusive sister in the film "Whatever Happened to Baby Jane?" is Blanche. "What Ever Happened to Baby Jane?" is a 1962 American psychological horror thriller film that was produced and directed by Robert Aldrich. It stars Bette Davis as Jane Hudson and Joan Crawford as Blanche Hudson.

The film's plot concerns an aging former actress who holds her paraplegic ex-movie star sister captive in an old Hollywood mansion. In this case, the screenplay by Lukas Heller is based on the novel 'What Ever Happened to Baby Jane?' by Henry Farrell. Upon the film's release, it was met with both widespread critical acclaim and box office success. The film was later nominated for five Academy Awards, winning one for Best Costume Design, Black and White.