Hitler's daughter

Did Hitler's daughter, Heidi, really exist? - What if she did?

The bombs were falling and the smoke rising from the concentration camps, but all Hitler's daughter knew was the world of lessons with Fraulein Gelber and the hedgehogs she rescued from the cold. Was it just a story or did Hitler's daughter really exist? And i you were Hitler's daughter, would all the horror that occurred be your fault, too?

Do things that happened a long time ago still matter?