I understand. My H is still lying. I have no idea why they believe others will take them at their word, especially with their history. My H likes to believe the kids will be happy for him, too.
You're going to have to make it clear to your H that while HE is welcome at Thanksgiving, OW is NOT. That is a clear boundary that should not be crossed. He'll more than likely lie to her, too; I bet dinner gets "cancelled" at the last minute for some reason. Lying seems to be a new way of life for these Walk-away spouse's.
Facebook? He is out of his mind asking for your password! He has his own account now. There is no reason for him to use yours. The self-delusion these WS's entertain is crazy!
Today, my H supposedly has a meeting with clients to explain changes in company. Never mind he left wearing shorts, his OW owns a Farmer's market here in town, and has been advertising a huge estate/garage sale for today and tomorrow. I tried to talk my kids into going to get some tomatoes for me. They refused to go, which is a good thing now that I think about it. I shouldn't put them in that position.
I guess I could go if I'm that suspicious, but what would I gain by catching him? I hate this suspicion. I don't want to live like this. Lots of thinking to do.
I'm glad you didn't text your H. He needs to face the reality that his choices are costing him his family. He chose his behavior, he has to live with the result.