3 and Melissa gave great advice so there is not much to add other than to reiterate that none of this is a reflection on you. I am sure the finding out that he had continued the A and continued to lie has opened fresh wounds and the AP childish behavior is adding salt.
He knows he is out of control. We have talked before about just getting out of the way. You can decide what that looks like to you.
Me 44 H 42 M 10 T 12 (at time of BD) Ss 20 16 S11 (special needs)
BD 9/13 H "unhappy for years" moves to seperate bedroom 10/13 EA/PA confirmed but denied S and I move out 3/15