Must be every minute a seemingly family man turns into an utter twat.
He will behave in ways you could have never imagined, he has lost the right now to any respect from you.
Act acordingly, he is now a stranger and a horrible one at that.
Do not take his re writing and vitriol to heart, this is always done to reduce their own guilt, the more guilt they feel the more obnoxious they are
A complete fool who has endangered losing his family over some stupid friendship with someone else, he has now ended your friendship and maybe lost the friendship of his children.
Unfortunately no mater how hard the betrayed party tries to unify the ex and his children, it never works out the same, something gets lost when men betray children's mothers.
It's an unfortunate by product of affairs and mid life crisises, believe me he is the one that has lost, he's a waster, a tosser and now has shown the world his hand, he wasn't up to the job.
Now, self care, hydrate, eat whatever you can and get the support you need, do not lie for him, open up and let him soak up all that humiliation that is his. He will blame you like crazy, do not for one minute listen, it is all a show to make his pain of being a deadbeat dad go away.
My advice, is not to communicate, only by email but be civil in correspondence, remember he is now a stranger. Do not send him angry texts he will use these against you, he knows how angry you are and how quickly he has sprung this on you, he is expecting vitriol.
This vitriol will be used by him to show the world you are crazy, unreasonable and vicious, he will show it to his parents, his ow, his healthcare professionals, his solicitor. Remember this in the early days.
Only speak to him in person, no written anger.
What I will say at the moment, you do not know if this is what he really wants, the leaving, throwing in the divorce card, and the hurting of the children explaining his departure could actually just be him trying to get his space and freedom, till he knows for sure what he wants to do.
He has thrown you and the family into a paralytical fear, that fear can immobilise you.
Phone a solicitor and make an appointment, get your ducks in a row for any eventuality, he will not expect this.
This is now a game for him to win, a game within a number of months he may regret he ever began.
He's a complete bastard, I'm so sorry, we are all here for you supporting you, ask us any question we have been through every scenario.
Take care 