It's only natural to want to be on good terms with the person who is caring for your darling You will feel so much better in time when you can wave her off happily knowing she is going to have a lovely time with her dad.

Oh and the other part - it's also only natural to want an ex to either 1) have the words crappest life now they have left you or 2) come crawling back at some stage telling you that leaving was the worst thing they EVER did. That's the rules!