Not enough
My read is that it does play a role and therein lies your solution. Speak to the pastor/priest and view it as a more effective means of counseling and ‘shepherd’ the children in as well.
You raised your son: Give him a lifeline and he will find his way.
On the outside, if he’s inclined he needs to seriously consider recording her ‘episodes’ and make a list of those who witness her ‘episodes pursuant to his future custody battle.