The Naked and the Wicked (1951)

Using actors' names since they differ in the dubbed versions: Carla Del Poggio is the wistful companion of opera star Madam Stefania Monti. Carla soon learns that Madam's accompanist, Gabriele Ferzetti, is fond of bedroom romps with Madam's wistful companion, and is also a thief who absconds with Madam's jewelry. Carla is accused of the theft but her attorney, Frank Latimore, who is also something of a mama's boy, wins her an acquittal. Latimore plans to marry Carla but his mother, Tina Lattanzi, steps in and tells Carla that marriage to her son will ruin his budding career, and she moves on. Carla, after giving birth to Latimore's baby, becomes a famous nightclub singer. Time passes and Ferzetti, the jewel thief, returns and attempts to rape Carla, but she shoots him dead. At her murder trial, Latimore defends her again, and also learns he is the father of her child, and she only left him because of his mother's interference. She is once again acquitted, and Carla and Latimore move on, sans his mother.