Ugh. As soon as Shannon started I knew (well, and given the previews..) that she was going to end up looking like a raging lunatic and Heather (in her white lace doilly) was going to skate away with an indignant look on her face, acting aghast at that crazy lady who accosted her! I'm cringing at her faux concern in next week's previews ("Do you think she needs an ambulance?") Classic evil mean girl. She's a terrible actress and an atrocious woman.
That being said....
I don't think Shannon's in good shape to be on the show. She's fragile as hell and so easily provoked (alcohol is NOT her friend right now - I noticed she passed up the champagne, but was drinking something on ice in a short highball glass for the rest of the epi..)
I really wish she could have been coached ("don't engage. Don't take the bait. Stay calm. Nod and smile - they'll look like aggressors and you'll like like a polite dinner party guest if you just don't...oh crap, there you go.")
And Vicky should have said something, but I don't know if I would have backed a dog on that fight either