Things are really sounding good. I will just on the bandwagon to go to the IL's and act as if. I feel it is a way to show your H that you love him. One thing that helped me with my IL's not saying anything to me when my H left, was to think that maybe they don't know what to say. When my MIL finally said something to me, she could hardly speak, she was crying so hard. My FIL has never said anything to me at all about all this, but my MIL told me she found him watching our wedding video over and over.
As for them watching to see if you do or don't click, try to put this out of your mind. Go and be polite - the suggestion (?Ellie I think had) to pretend they are aquaintences is good.
You are doing beautifully. Stay the course. Your situation is very hopeful, IMHO.
Take care. Have a wonderful holiday if I don't "talk" to you before Christmas ~
Hugs~
Mockers2
"Somehow we survive, and tenderness frustrated does not wither." Dennis Brutus, South African poet
"That which does not kill us makes us stronger."
Friedrich Nietzsche