Eva's mother, Emmy Zimmermann, bombarded the authorities with appeals for Eva to be released. During 1944 the mother fell seriously ill which evidently increased her determination, or at least the effectiveness of her campaign on behalf of her daughter. It was not generally known at this time that Eva Busch had been conceived as a result of her mother sharing Eva Busch's father with the father's wife, , who also happened to be Richard Wagner's daughter. But Emmy Zimmermann's career as a top Wagner soprano during the earlier decades of the twentieth century and her continuing "connections" to the powerful Wagner dynasty were no secret. It was also no secret that top Nazis, including Hitler himself, were enthusiastic backers of the Wagner cult. Sources differ over whether it was her mother's efforts on her behalf that shifted government opinion, or whether she benefitted from a growing awareness that one of the singers whose records were most popular with the troops fighting the war was being held in a concentration camp. Either way, whereas most Ravensbrück survivors emerged only as the war ended, Eva Busch, camp inmate number 7964, was released some months earlier. She made her way back to Berlin, arriving in time to experience, from inside the city limits, the city's destruction . Escaping the city quickly became impossible and was in any case officially forbidden. At the "Haus Vaterland" pleasure palace in the Potsdammer Platz she sang to entertain war-wounded soldiers with songs she had earlier sung in Paris such as Manfred Krug's "Du hast Glück bei den Frau'n, Belami" ("You're lucky with the women, handsome friend"). Weeks later she was singing for Russian troops and then for the Americans.