Good luck ggg, I wish my ex had stayed out of our lives, He favours our son over our daughter and I find it hard.My thoughts are with you. How old are yours mine are too old for me to take this course of action and they would never forgive me.
good luck I hope it brings you some relief
a word of warning though
my mother did this when her and my dad split and I grew up hating her, but circs were different and my dad was a decent guy who did try and try.
hugs and good luck