Mine is that her mind was shattered once she killed her daughter and everything after that was in her head. You can argue with me as much as you want but it's all up to the viewer's interpretation and that's how I see it. There is no right or wrong way to see it.
shareActually there is a 'right' way to see it; the way the director intended. Every interpretation is not correct.
Look up the term 'authorial intent'.
Your interpretation is interesting and would certainly work for a similar but different film. But in this case, as previous comments have stated, there is clear authorial intent. The choice that she makes for all eternity at the end of the film must be real for it to have any impact & meaning, both for her and for the viewer.
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