Having a uBPD/NPD alcoholic husband is a doozy. And you managed to get him into marriage counseling! That's amazing.
I'm trying to imagine what occurred for him to go to AA in the first place?
You don't mention whether his lying has increased after joining AA. I wonder if lying is helping him manage intense shame or potential exposure to vulnerability. Perhaps it allows him to protect the fragile self constructed, the one who is admitting something is not ok.
My ex would take something true and embellish to the point of absurdity. Spending a few months in India would be presented as "LnL was cultural attache for the Dalai Lama."
I used facial expressions to manage the absurdity. Raised eyebrows, a look of puzzlement.
I'm a fan of using non-verbal communication with my stepdaughter, who is covertly aggressive and likely BPD. I use it to allow us to have socially acceptable interactions without feeling like I'm being steamrollered. I used to validate her and it felt like I was providing narcissistic supply, only to be kicked in the back. It felt like I was volunteering to be used and that didn't feel good.
So I started to say things like, "Oh? Hmmm. Ahhh. Ok. Uh-huh" and if it was about something she wanted recognition for, I would say, "You're proud of this drawing."
I don't know if something like that would work in your marriage. SD25 has to work within the social code of our blended family and she is a waif, so there are some constraints to how she can behave without losing victim status. If you change the way you respond too much, and your H doesn't like it, he might have no issue chastising you for changing. You would have to shrug it off and stick to it without explaining that you're trying to tolerate his grandiosity while maintaining your sanity. Sometimes non-verbal boundaries can be the way to go
