It is going to be many months before she settles down. The only way that you will know if her change of heart is genuine is if she is consistent. Always try to remember...actions speak louder than words. Consistency is what you will need to look for.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.