So many positives.
Of course he has to create a narrative that his appalling behaviour was justified.
In all your writing I do sense an underlying feeling from you about when he tries to return home to you, and how that will feel for you..a victory??
Maybe fleetingly but I think soon it will feel hollow.
It is not if but when this happens.
It will undoubtedly happen,..... but only when his upset and grief of what he has lost finally flattens him.
It could be before Christmas or it could be the Spring.
I would advise you to be very very careful when he does.
Be very careful of thinking you will have won.
Won what?
A vain nasty man that made a show of himself and your long marriage?
It can be tempting to take him back but in my experience it can lead to regret.
Huge regret that you publicly take him back and then realise that shit, YOU really are over him,..... and actually don't want him back in your life/home again.
I know of a couple of cases of this where women privately hugely regretted the reunion, and then hesitated because they dreaded the "drama" of another breakup. They did eventually divorce but felt they could have saved themselves huge additional stress if they hadn't allowed themselves be talked round.
So my point is WHEN it happens, take the win, such as it is, when he asks to come home, but think long and hard if you really do want him back.
Also, do not underestimate the difficulty it may cause in your circle of friends.
Some may pull away because even though they are very fond of you, they may judge him to be a tacky plonker and really don't want to resume socialising with you again as a couple.
This can even happen with very close friends and is very upsetting.
Sometimes people imagine a reunion to be straightforward and simply a matter between the couple, it often really isn't.
These situations cause surprising ripples.
My point is to quietly examine regularly where your head and thoughts are on the above, so that you are not blindsided by him and agree to anything on the back foot that you might regret.
Don't be tempted to agree to anything for your children either.
All your future actions need to be 100% centered on your wants, needs and thoughts of YOUR future.
Examine closely your emotions.
Do not allow him to move back in out of sympathy, as getting him out again would be very difficult.
I really hope you consider therapy for you to tease out where your head is at.
This has been a period of such drama for you that you can get caught up in waiting for the next incident or meeting with him. Not focusing on this period enough as a new reality for you, and your life, and what you want long term.
You may love your house etc., but do not take him back to keep it.
You WILL survive moving house.
Savour thinking only of yourself.
Do you really want to go back to putting him and his needs first?
When he leaves her, alternative housing will be an issue for him.
He may lead a discussion with this in mind, while still with her.
Do not underestimate his need to land on his feet being his priority.
Do not be pressured to provide a soft landing for him.
Anything you do going forward has to be in your interests only.
Just food for thought.