Things are looking pretty interesting in your corner, Pilot!
As I said earlier, I think you handled the inlaws with grace. Everyone is different of course but one of the things I always found attractive about my H was how he treated by parents (kind, respectful). So I like your idea of taking the kids out to see grandpa for his b'day. Shows you are committed to family, too. Agreed it would be a good idea to tell W. It seems you are on pretty friendly terms right now so shouldn't be an issue, right?
H 37 Me 36 Together 15 years Married 5 years No kids BD Apr 2014 H moved out 2 Jun 2014