Hi, Cms39,
You were describing my former inlaws while I was married. Never included in conversations, and if I tried to interject anything, it was ignored. Most comments directed toward me were insulting. My then husband was oblivious to it, and after 10 or so years of it, a lightbulb finalliy came on and I realized I didn't have to subject myself to them anymore. I simply declined to go on visits, which were frequent ,though they lived 6 hours away.
We had been divorced 4 years, when I saw the inlaws again at my daughter's wedding. The were gushing all over me....and ignoring my exhusband's new wife! What a bunch, LOL!
I'd suggest you detach from these toxic in laws and, as Faye so wisely says, don't give them the power to upset you!

Happy thoughts,
seeker Patty