The Secret of Helene Marimon (1954)

At the end of the Great War, the wounded Jacques Taillandier is cared for by the beautiful Hélène Marimon and becomes her lover. He hides from her the fact that her husband is a comrade from the trenches, and only reveals the truth when he learns of Marimon's death. Outraged, Hélène drives him away. After many years, Jacques reappears to learn that Hélène had once given him a daughter. Hélène, unwilling to reveal anything to young Dominique, forces the man she loves to leave her country. Dominique not only gets her mother to talk, but also reunites those separated by fate.