Hello Lou.
I'm so glad you are talking this through here and in RL - it will help you keep a sense of perspective. I can only speak for myself here but in a similar situation myself last year, after 20 years of marriage, the ONLY thing which worked for me was to go no contact. And I mean NO contact.
So:
I engaged a solicitor the day after he went and filed for divorce for unreasonable behaviour which includes adultery. I was in incredible pain but lets remember the deception isn't all about OW - it's about those values you thought you shared as a couple, the life goals you thought were about your family together, the trust, respect and caring which are the very fundamental building blocks of a secure relationship.
I phoned the banks, council, all utilities, mortgage company, changed passwords, pin numbers etc immediately and froze the joint bank account and our savings account.
Told absolutely EVERYONE so there was no chance of a history rewrite.
Changed locks.
Took him off my car insurance. Changed my will and my death in service pension within two months (yes, I really meant it even though I still loved him).
Blocked his emails, never read any of his texts, never answered the phone to him, never listened to any messages, never responded to ANYTHING until-
We went to mediation. Then I let him have it.
Last week i moved into a lovely little house with my DD and our two lovely cats. I have the financial settlement I wanted. None of my ex's plans have come to fruition.
I neither know nor care how he feels about what happened. I neither know nor care how he feels about me.
I do know that having had the rug pulled out from underneath him by me was the very last thing he expected.
Indifference to your H's thespian tendencies is the best way to communicate what a twunt you now know him to be.
Don't pity him, don't try and understand him, don't accept his manipulations. The potential here for you is immense.
i wish you all the best and will keep lurking.