@ro_ibs
As far as I am concerned it more like she
remembers her future life. She woke up one day and had these memories, but not the mind.
Think of it as remembering your childhood, but reverse. Just cuz you remember being 7 doesn't mean you are mentally 7.
Of course the shit she remembers is horrifying, especially for a child and therefore impactful and on her mind, but she is still a Child nonetheless and therefore acting like one.
Being mentally abused and locked up for most part of your life isn't helpful either, or so I would Imagine.