I'm glad things went well with the child exchange and you enjoyed your time w/the children. It's never easy when there are children involved.
Actually, I'm not at all surprised that your xw was friendly w/you. The pressure was off and the divorce was finalized and she now feels that she has regained control over her life. As long as you do not attempt to control and/or manipulate her, she'll remain friendly. Keep in mind, she's not out of the woods yet and what you witnessed very well could be a touch and go. Tread lightly for she is still fragile and will need to see that you are not a threat to her, i.e., trying to tell her what to do.
You will now have to dig deeper for patience and do not attempt to rush the process. You and your xw will need to start out as friends and hopefully things will work out and a reconciliation take place at a later date. Both of you have some work to do. She will need to do the necessary hard work to earn back your trust and you will need to work on any issues that she claimed you had, i.e., control.
