I stumbled on this an hour ago, and have in vain scoured the internet to find where a body can order the WHOLE, finished film. The many snippets of video clips, as well as the blog, serve as powerful bait to want to KNOW the entire story.
Based on the many clues left by the daughter, my hunch is that the woman might've been forced into being a handmaiden to Mengele, or into sex slavery (cf. Elie Wiesel's NIGHT).
I reckon there're HUNDREDS of untold stories like this hidden away in the hearts of people like Agnes. It's a huge loss that they remain there.