In 1876, while Alois Hitler's first marriage to Anna Glassl Klara Pölzl , entered in his service as a housekeeper. Not long after Alois began a relationship with the 19-year-old Fanni while he from bed and separated from his sick wife. Fanni demanded, however, that Klara would go away, because they regarded her as a rival. Alois married after the death of Anna with Fanni on 22 May 1883 in Braunau am Inn. At that time she was heavily pregnant with their second child. Fanni had already given birth to a son on 13 January 1882, Alois, who after the marriage of his parents was acknowledged and the surname "Hitler" got.
By Alois got Fanni two children:
Fanni died on 10 August 1884 at the age of 23 to the lung disease tuberculosis. Alois began almost immediately after a relationship with Klara. They were married on January 7, 1885.