Hello J.!
My thoughts and prayers are with you in this horrible situation. However, I wanted to tell you, in some states, because your boys are 13 and 14, the courts are sometimes willing to listen to what the boys would want, as long as both situations they would live in would be a safe loving environment. I have a friend who's daughter opted out of some of her visitation with her father, because she turned 13 and she was missing out on so much during the summer, and the court allowed her to do so whether the father wanted it or not. Talk to your lawyer about having the judge re-look the entire situation. If indeed the father is planning to move, this move could upset their lives and cause emotional stress.
Regarding your husband's lawyer on the boys behalf, I believe your boys have the right to speak through both of your lawyers or a youth service. This sounds fishy to me...for lack of better words. It seems they are not being represented fairly if not heard on both sides. Talk to the boys about what they want to do. And then talk to your lawyer.
Have you thought about seeing a family conseler with your boys and new family? Not dad? These things look good to a family court. And they can help you be closer with your sons, finding out where they really want to be and knowing you love them. The conseler can also help them to learn to speak up for themselves, AGAINST the controlling dad, if need be. Knowing they have a right to say what they want and don't want. And knowing they will be safe with YOU whatever their feelings are.
Good luck. My prayers are with you. Take care and keep your head held high!
Lee