Mama, these board fly so quickly and missed your update. I am SO sorry that this jagoff has tried to worm his way back into your life.
In my experience, any attempt to educate mutual children of a predatory and toxic person never turn out the way we expect. NPD's and sociopaths are cunning in their manipulations, especially where children are concerned - children are often made to feel "obligated" to accept whatever it is that their parents do, even as adults.