Thanks for this thread. I've been bothered by how many people are stating that she had Stockholm Syndrome. Really? How do we know that? It seems to be making a pretty big assumption.
What are the actual facts? She was kidnapped, raped, tortured, kept outside, she had 2 children by the kidnapper, she was completely dependent on him for food etc.
What we don't know is why she didn't leave. I don't like anyone telling me why I do things and I don't think it is fair to say why others do things.
We could make a reasonable assumption that she was either physically prevented from leaving, or had a reason for staying.
Was she physically locked up for years? Maybe.
Was she afraid that she couldn't feed herself or her children if she left? Maybe
Was she afraid he'd kill her or a family member if she left? Maybe
Did she feel compassion for him? Maybe
If I had to guess, I'd imagine she was scared silly to leave because she couldn't get very far, he'd find her, hurt her or her family etc., perhaps kill them.
Could she have finally accepted that this was how her life was? Maybe.
Did she stay because of Stockholm Syndrome? Maybe.
My personal guess would be that she physically couldn't leave for a long time, until he knew she was so scared she wouldn't leave. However, that is a guess. I would not assume that she has empathy for him, or cares for him, etc. But those are my guesses.
I think we can list possible reasons, which makes for interesting thinking and reading, but for us to tell her how she felt and why is wrong.
given what we know about other cases it's not too hard to assume one or many of the things you listed above happened though.......