Do you give them a little supply to dose them and get your nasty out, or do you sit in silence. I only deal with him now on business and minor child. Minor child recently struggled and I gave him a chance to step up and was reminded again that there is no point. Very clear at the beginning of the call that he thought I was lying about the child and just trying to pursue him in some way (so not the case).
My guess, he reads anything you say that is not just business (check is in the mail, documents are signed, dog is available Wednesday) as pursuit and it only teaches him that if he wants a response (which he clearly does as it sounds like things are winding up for good soon--what will he have to mess with you about other than the dog?) he has to work harder for it. Mine has done some absolutely insane garbage. I've stopped recording it. What is the point. Remember, the only way to hurt a narcissist is not to respond to them. They will take the good, the bad and the ugly, all of them feel the same--vampire blood.
How did it go with the forensic accountant? Was it a thumbs up, thumbs down, or thumbs to the side? Were your concerns realized?