So many of these are bitter, uncaring, or an attempt to appear uncaring. lol
I would tell her I hope that she has that family with three kids she always wanted, with a man who treats her better than her first ex.
Even with the exes I parted on bad terms with, those ill feelings go away in short order. Wouldn't wish ill on them. I mean, you were with them for a reason, and so often a parting is a result of differences in perspective, right or wrong. Just the way it is with human nature.