She is going to completely undo everything her daughter did for her just because she is just an absolute dunce. This honestly irritates me just typing about her actions. He should not forgive her and make sure to find someone better and be extremely happy just to show the dumb broad what she messed up.
Rather than her being an idiot, at this point I think it's some PTSD that she's not self-aware of.
Her last life was so oppressive that she seem to have had nothing positive in life except her daughter (and the oppression became 'normal') and even now that she regressed before all that she's become so afraid of 'everything' that she clings to her daughter - the one thing she's 'certain' she can be happy about.
So the only way for her to start moving on is for someone/something to break her 'certainty'.
I feel like the 'protection of time' from her daughter will be key to that.