Himmler's Mistress

Heinrich Himmler sent Valentina Schneider to a concentration camp for helping Jews and Allied soldiers to escape from Germany during WWII. Her sons and their father, Ivan, rescued her in the last month of the war.
In this final book of the Romanov Legacy trilogy, Valentina returns to her home in Munich. Her sons go to Soviet territory to find their girlfriends, but the Soviets arrest both men. Ivan goes back to Moscow to free them.
Valentina had attended many parties with Hitler's leadership, and rumors abounded that she had been Himmler's mistress. She owned a lens factory near Munich. Nazi administrators brought slave labor to the factory while she was in the death camp. Allied prosecutors believe she was responsible and charge her with war crimes. They incarcerate her with Goering and the Nazi leadership who await trial at Nuremberg.