The Nazis would break their promise of sparing the lives of Kübler's parents. They were deported to the Theresienstadt concentration camp; from there they were later transported to Auschwitz and killed. Kübler's husband, Manfred, was deported in 1943 to Auschwitz, along with his family. Kübler still continued her work for the Gestapo until March 1945. During that time, she met and married her second husband, Rolf Isaaksohn, on 29 October 1944. Isaksohn, a fellow Jewish collaborator with the Nazis known also as a "Greifer" ("catcher").