A little more info: A non-Jewish German couple. The man owns a bookstore, and the woman is a painter (portraits mainly). The woman is disabled and uses a wheelchair.
Thanks for any help!
ETA: More info. They are anti-Nazi, have Jewish friends, and live near Berlin (I don't know the geographical area of Germany yet, and so can't be specific). The story will tell about the sterilization and euthanasia of the disabled.