Notorious

Alicia Huberman becomes an undercover agent who has fallen for the government agent Devlin, played by Cary Grant.  He has also fallen for her but when he has to put her into another man's arms he covers his true feelings but acting cold toward her.  She marries a German Nazi in order to spy on the group of Nazis.  Her new husband soon catches onto her true motive for marrying him after she finds her investigating the wine cellar with Devlin.  Honestly, the mother seemed more evil than the Nazis.  She is the one who poisons Alicia day after day with the intent of killing her while controlling her son.  Devlin realizes that they have caught onto her being a spy so he rescues her from her death bed leaving Alexander to his Nazi buddies.