Whether he 'really agrees' or was 'just delighted to have her on his side', the fact remains that he made agreeing noises and is clearly invested in the narrative that your marriage was over and all he did was act on that 'fact'.
You need to accept that there is no question here - there is no 'did he really agree' or was he just 'pleased that someone saw it his way' question.
You are giving head space to the equivalent of the question 'how long is a piece of string?'
The resolution to your angst is in front of your eyes, in plain sight:
He embraced the narrative that the marriage counsellor dangled in front of him. You effectively caught him red handed again.
He does not want this marriage. If he did then he would be falling over himself apologising and taking responsibility. Instead he jumped at the chance to have the narrative he has in his head affirmed by a person with 'authority'.
He has checked out, my dear. You cannot force him to engage with you in the marriage relationship. The best alternative you can hope for is to focus on co-parenting effectively and respectively.
You may well find that drawing a line under this marriage and using your energy to create a solid little world for the children, focused on them 100%, will bring about a better sense of security for them.
www.infidelityhelpgroup.com/2014/01/31/rewriting-history/
It's a well known and very predictable script. People who cling to it even when they are faced with the prospect of losing their families are:
Power-and-control hungry,
Too proud to say sorry and mean it,
Too invested in having things their own way,
Not marriage material.
You are not going to put a dent in this narrative. You are not going to hear him say sorry.
Of course he chose to have the affair and of course he had the option of sitting down with you to talk honestly about how awful your marriage was (
). The fact is, he didn't. Now you are facing all of his justifications and it is doing your head in. He is completely invested in his version of events because they make him look good. He is willing to throw you and the last 16 years of your life under the bus in order to maintain his own self image.
This rewrite of your history with them is so frustrating. You were there dammit! You’re not stupid, or unobservant! You lived this history WITH them – you were the one they laughed with, danced around the kitchen with, whispered their dreams to. And yet here they are, telling you that your understanding of your history is wrong, that it was as manufactured and carefully preserved as the ever-lasting Twinkie.
The Fakery Bakery
In order to cook the perfect batch of fakery, the cheater needs to follow a recipe. The cheater script is a perfect recipe to whip up a batch of history-mystery for you.
Let’s look at the flimflam that has been presented to you in the conversation you just read:
1. “I haven’t been happy for years.”
If I say that I have been perfectly content, that doesn’t fit in well with my ‘and that’s why I am entitled to my affair‘ rationale, so paint me unhappy! In fact, let me stress the point that I am not just recently unhappy, but valiantly struggling against my unhappiness for years. That gives me pathos, grit, and means I am just a good person who crumbled under the crushing weight of unhappiness. Just don’t ask me the specifics because that part of my story is a bit murky, and doesn’t hold up well under close examination.
I really recommend this site for you.