Nice to meet you! What a breath of fresh air your new family arrangements are even though it was something you never sought. You gave a real gift to your children in how you both handled the divorce.
It sounds like your ex-spouse is used to getting things on her own terms. Double check the divorce decree and confirm what the agreement is. She probably can't move without alerting you and/or having your consent. In my case if I move farther than 25 miles away, ex has to be told... and I have physical custody of our youngest.
You sound like a 'big picture' guy. Focus on your priority (being a connected dad) and go from there. It's hard for your ex-spouse to argue when all you give her are facts.
