Re: update and a question of reality
Personally, I think she is fooling herself. She sees you moving on and making a better life for yourself, and is probably taking it as a personal blow against herself. Now she's wants to prove she can still have you.
My vote would be to say no - I mean times got rough and she cheated. What's gonna happen when things get rough again --because they will, that's a fact of life. But IF you really want to give it another try, I would take things realll slooow and start all over again getting to know each other. Don't let her just drop in and say lets try again. Make her show over some period of time that she's willing to put the effort into proving she really wants you.