Your daughters sound like wonderful girls and you are right to be proud.
I couldn''t be more proud of my two, they have handled this exceptionally well but daughter is very sensitive while son can hold his own.
I am sure my son will invite his dad and then it is up to him.
I know I wouldn''t put anyone or anything above my kids certainly not someone who wants to cause a rift between dad and kids but he has never cared that much anyway.
Thats the spirit Julie!!!! Just be glad, like me, that you have got rid of a cheat from your life, once a cheat always a cheat and let them wallow in their regret years down the line - whilst we wallow in our childrens achievements!