The depiction of Mrs Goebbels act in the movie Downfall was one of the most disturbing things I have watched. Still bothers me to this day.
Quite apart from her delusion in the face of defeat, I think she had no illusion of what would probably have happened to her children at the hands of the Soviets (who had demonstrated their ruthlessness towards German civilians as early as about 1943, when they briefly captured the German border town of Nimmersdorf)...she probably considered their death at her own hands an act of (twisted) mercy.
I especially remember the glaring look of betrayal on her face right before Josef pulled the trigger....
Most people remember that movie for the “Hitler Reacts to” meme...which were funny, don’t get me wrong. But altogether, that was one of the most unsettling movies I’ve ever seen. Especially that scene.