THAT'S the problem, right there! Your brother is not going to be able to "grow balzoneez" overnight. You and Mom can't fix their domestic cultural challenge at the 11th hour. I hope the niece voices an objection.
A man about to be accused of abuse has just been warned he will have to prove a negative or risk losing everything.
At that point...if he let it get to that point...he's probably doomed. Too late now to do what should have been done years before. The camel is now confronting the eye of the needle; there are still things he can do but chances of success are vanishingly slim.
Most lawyers can't even return a call in 24 hours. I have personally taken such calls. For the caller it's life-or-death, for the boss it's a distraction from which his secretary is supposed to protect him.