Didn't see a thread yet so I started this one ....
Skipping a few other things I'll comment on after I rewatch, going directly to Kim G and her deliberate classless behavior. For her to do something that totally outclasses this group of women (and men) is so over the top. There is no excuse because it was deliberate, to invite someone that would so provoke Teresa to Melissa's party is on par with .... I can't even find someone to compare.
It matters not who is at fault here, the Guidices or Kim G's guest Monica, to invite her to this Christmas party hoping there would be drama when Teresa sees her just shows her character. I don't think Monica knew whose house it was, and I'm laying the blame here directly on Kim G's doorstep. And maybe 5% Melissa for inviting Kim G in the first place, knowing the story behind Teresa and Kim G.
Also, Kim G arguing that Monica should stay when the hostess and then the host very politely regret that the guest you brought cannot stay ... like they would change their minds. Hello, Cameras!
I must say that I was impressed with the gracious way Melissa and Joe conducted the conversation, not their fault Kim G is a crass, classless witch.