This movie is as a magician saying to the audience, “Look there (thinking: while I do this here without you noticing)”. The movie would be put on the Index for the reason the woman, “Nina”, became pregnant out of wedlock; but, then, if she behaved morally in the first place, the movie would not have been made.
I hardly think the movie would be put on the Index because Nina was pregnant out of wedlock. What are you thinking? No narrative involving human beings can be without an element of sin, fallen creatures that we are. Read your Bible if you want to see lots and lots of it.