"What Alice Forgot" by Liane Moriarty

Out of all the characters in the book, who do you think had changed the most over the past decade and why?

For further information about the author, check out: 
http://lianemoriarty.com.au/

For a Q&A with Liane Moriarty, go to:
http://www.realsimple.com/work-life/entertainment/liane-moriarty-answers-questions-from-online-book-club