M.B.
Ok... If you were in her shoes, and the ex-wife, wouldn't you want to be able to have a civil conversation? Wouldn't you want to be able to just talk about stuff?
Some people it just doesn't work out being married, but they remain good friends AFTER the divorce.... which is a wonderful thing, especially where children are involved......
Also, think about what is best for his daughter......she needs to see a GOOD relationship between all of the adults involved in her life........ not enmity between her M. and dad.