Hurley believes he is there because Hurley had won the lottery, but his father says that he's there because Hurley's mother had called him. She wanted a manly influence to get Hurley to stop thinking about cursed numbers. Hurley wants him out, but his mother wants his father to stay.
Episode 3x10, Tricia Tanaka is Dead
Episode 3x10, Tricia Tanaka is Dead