Do you think the whole experience with Dean and the kids made her a better person? I think that deep down she was a good person all along. The scene you can really see it in is when she apologizes to Andrew.
SHE IS A SPOILED BRAT OF A PERSON.NOT FROM BIRTH BUT FROM NURTURE.THE ACCIDENT GAVE HER A BLANK SLATE TO DEVELOP DIFFERENTLY.
That came put with the water hose and the kids seeking get in the yard. I guess being out of her environment was good for her