You either get bitter or you get better. It’s that simple. You either take what has been dealt to you and allow it to make you a better person, or you allow it to tear you down. The choice does not belong to fate, it belongs to you.
She stayed too long and that goes back to what she'd always done. When there was a mess, she would clean it up. And I think that's one reason why she stayed as long as she did. It was so hard to admit that somethings were too soiled to ever come clean.