We recently went through the same thing with the
BM.
I was scared until the very end.
DH's kids suffer from PAS and would do anything, including lying to the evaluator, not to get BM angry with them.
Everytime we had an evaluation, we thought we had lost.
Came down to the court case, and the judge says he will take all the evidence under advisement and notify us by mail. BM had witnesses, we decided to go just on the evidence and not drag the neighborhood and the children's mother down with it.
Have faith in the people in the judicial system. They all saw through the lies. Although we didn't find out we won until a week after the court case, it turned out that the judge had made his decision immediately after the hearing.
I have the sneaking suspicision that the case was decided before it was even heard.
Remember, the courts and their evaluators deal with people like your children's BF everyday. They can see through the lies and deception. If the BF does not have documentation that he has attended anger management classes before the court date, I know you will win.
I know what a frustrating situation you are in. I was just there. Have faith. My positive thoughts and prayers are with you and your children.