Desc: Du kannst nicht treu sein: Directed by Franz Seitz. With Lucie Englisch, Joe Stöckel, Hermann Speelmans, Otto Fassler. Hotel heir Max learns that Katharina, manager of a competing hotel, might be a suitable wife for him. He gets a waiter's job in her restaurant, likes her instantly, but she is a tough boss and rejects him - until her provokes her jealousy.