Is there any way to have the therapist sit with you while you both tell the kids? No way (TG)STBXW would pull something stupid with an onlooker. (TG= Thank God) The therapist would be able to guide you all through it and work with you guys to help answer questions and stuff. That's what I would do.
If that's not possible, there's no way on earth I'd let her do it separately. The lady has lost her marbles, and I'm pretty sure she's not going to find them any time soon.
Actually, I think she's so angry because she knows she screwed up big time, knows she's to vain to admit it, and knows she dug herself in too deep. Narcissistic. It's like through acting out against you, she's avoiding dealing with the wretched things she's done.
I know this seems difficult for you regarding your relationship with your children, but my mom was batchitcrazy for most of my life, and I always knew my dad was the hero, though certainly flawed. He put up with a lot from her, and I always wondered why he didn't call BS and divorce her butt or at least stand up for himself.
Your kids will love you no matter what crazy stuff your W pulls. In the short term there might be fall out, but if you are consistent and loving, in the long term it will all work out. In those crazy moments, you have to see past the moment and keep breathing until it's passed.
Still following...
SD
Me: 40 H: 43 H had EA from 2/06-9/06 Bomb 5/06 Piecing since 9/2006 3/2008: Boundary setting 7/2009: Boundary crossing~dropped my own bomb. 8/2010: Marriage finally on track!