i think it's B ,she's wearing a black dress and before 2x18 had been aired i had seen a picture where they had zoomed the moment of them(probably them)in постель, кровати and the girl was wearing a ring which looked a lot like B's ruby one!sorry can't find it
I dont think this is Blair but i don't think this is Vanessa too. I want this girl in the постель, кровати to be Blair but I think it is b onother girl.