AAS, please listen very carefully to Mountainmomma. Here are a few things for you to ponder.
You were worried about the CAFCAS evaluation, but the judge was squarely in your corner. That 40 year old woman did not need to say why the interviews were so different than the home visit, the judge, who, as has been said, knows why. She did not say the children should be removed from the mother, I don't think you want that (maybe I'm wrong) but children do need both parents if its at all possible. Your ex clearly does not get that. I agree with you that your ex is delusionally thinking that gru will replace you nice and clean and done. NO judge is going to be on board with removing either parent completely without being severely provoked into that action. your ex is severely provoking the judge.
Your delusional ex is calmly doing EVERYTHING the judge is ORDERING her not to. She does not care what he wants and her efforts at alienating your children have redoubled since the judge warned her to stop. She does not recognize the judges place in her life. She is a typical sociopath. I tangled with one of these, too. Mine's attitude in court was "yes, I abused her, and who the hell are you to tell me that's not my right" and he proceeded to abuse me in front of the judge in order to prove his point. He proved his point, and he has no physical custody, no legal custody, and no visitation.
I think this is all there is to it, however, you need to be cautious. You need to keep to the bald faced, brutal truth. You need to fearlessly pull NO punches, for if you do, your children will pay for it. You do NOT need to lie, she is doing all of that for you. You need to stand tall and strong in court for your children. You need to allow your lawyer to point out the lies, you need to stand tall and agree or say they are lies when you are asked to. You need to allow your children to be interviewed if it comes to that (although I hope it does not)
I think in writing gru in as the next of kin, she has hopelessly shot herself in the foot. Make sure your lawyer knows about that. She could have been all sad and acting abused and hurt and protective of her kids and she might have got away with her lies, but she did not. She may lose custody altogether of her children. IF SO, LET THAT HAPPEN! She can always get it back, the system allows for that, but she would have to jump through some hoops, which she may or may not be willing to do. Remember the judge's job is NOT to help you or your ex in family court, it is to protect your children. Divorce is hard on children, and the idea is to minimize the damage. NO judge in their right minds is going to hand your kids over to a sociopath who is clearly showing her fangs as yours is. The sociopath is not really dangerous when they are deranged like this, they are dangerous when they are pretending to be a human, like she was when you got married. Many Sociopaths can get it together in front of a judge and act the part, you see it a lot on these boards. I am glad for you that this is not the case with your ex. She is one of the worst pieces of entitled work I have seen on here. She will sink herself, all you have to do is be strong enough FOR YOU KIDS to let her, and not soften it for her. If she loses custody, she can get it back, and trust me, you hope she will, but if she can not get her life together enough to stop hurting her kids, she SHOULD lose custody, it will hurt them less in the long run, because YOU know its not good for your children to see their mom as a monster, so YOU can soften that for them, and help them see a way to deal with it. SHE will not do that, for you, for them, or even for herself.
Keep on being the kind and loving father you are. Stand strong. Do NOT pull any punches in the name of being a gentleman, your children can not afford that. Our courts allow many avenues for parents to remediate, and to learn to be better parents and to reunite. Mine has not done that. Sometimes I see that as a blessing sometimes I hate him for it, but always I know its a protection for my child not to see him until he can recognize that his awful ways are inappropriate and damaging. Keep that in mind for you and your kids. Good luck.
One last word of warning. You are, this moment under the worst pressure you ever will be. She WILL ratchet up the crazy, calmly and without turning a hair, in the next few weeks. She is hoping to provoke you into something, be it taking your kids as is your right, but doing it in some physically or emotionally violent way, or blowing up at her and or gru for being their horrible selves or blowing up to protect your kids. The gru thing was pointedly intended to make you lose it. DO NOT lose it, you have done incredibly well so far. You are right to send ALL comunications including texts through your lawyer, she will twist ANY communication against you now. You have trod well so far, do not fall into her trap. It is maddening the way they are, but you can not be mad now. You just be quietly strong and loving for your boys and say nothing to them about her as they have plainly asked. You asked before how she can so calmly do all the wrong things. She is an expert at this. You just need to be calm, stay quiet and trust that the judge will be on you kid's side. Let her show who she is, and you show who you are and love your kids. I hope she can find a way to see them, but if she can't its your job to help your kids through it, not to fix it for her. keep that in mind. She is broken, you can only help fix your kids, she is lost to you, and if she is not careful, to them. I will keep you in my thoughts and prayers along with all of SI on St Patty's day. Best of luck.