Complex sentence: Ethel Gumm is unhappy with her marriage because of her husband's homosexuality, so to help herself cope, Ethel moves the family to Hollywood in hopes that her daughters will break into the movie business.
Split into simpler sentences: Ethel Gumm is unhappy with her marriage because of her husband's homosexuality. To help herself cope, Ethel moves the family to Hollywood in hopes that her daughters will break into the movie business.