In late season 1 of The Man in the High Castle, Heydrich dresses Wegener in his uniform and pours him wine before asking him to kill Hitler. He then lets him think on the proposal, threatening that his life is already over but by cooperating he could spare his wife's and kids'. He leaves him alone and upon returning is handed a slip of paper by Wegener listing even more names of his wife's relatives. What is the message implied by this?
Wegener basically realizes that Heydrich is right and that his life is already over because he has committed treason. He thinks that because Heydrich needs Hitler's trust in Wegener in order to fulfill the assassination that he can barter for more then just the lives of his wife and kids, so he hands him the slip of paper with names of more relatives.
This can be backed up by Heydrich responding with "Ten lives in exchange for yours" after he reads the slip of paper.