 Ten days before he died, Lindbergh wrote to each of his European mistresses, imploring them to maintain the utmost secrecy about his illicit activities with them even after his death.The three women (none of whom ever married) all managed to keep their affairs secret even from their children, who during his lifetime (and for almost a decade after his death) did not know the true identity of their father, whom they had only known by the alias Careu Kent and they had seen him only when he briefly visited them once or twice a year.However, after reading a magazine article about Lindbergh in the mid-1980s, Brigitte's daughter Astrid deduced the truth; she later discovered snapshots and more than 150 love letters from Lindbergh to her mother.