TFC, your husband is following the “Wayward Spouse Handbook” right down the line. Succinctly, you don't do anything about what he says except continue with your Plan A, and perhaps do some of Orchid's reverse babble when the opportunity presents. When you do your Plan A, always have in mind Pepperband's "Carrot and Stick of Plan A," okay? Plan A doesn't mean you become a doormat.

I forget. Have you finished your exposure plan? Did MIL and SIL have some chats with him on Easter as I think you said they were going to do?

How To Organize A Marital Recovery Plan
Spying 101
Exposure 101"