Rabastan was hardly in much a better mood, but he felt obligated to be the calm one of the three of them. It was a skill, keeping one's head when everyone around you was emotional to the point of irrationality; Bellatrix certainly seemed to be there, she was already drinking. He hardly disapproved of that method - he wasn't exactly sober at the moment, himself.
"Can I be of any assistance?" he asked mildly, "Or would you prefer that I leave?"
He was uncertain whether adding his agreement on the subject would be of any use. He did agree, of course; he had not expected this of Vera either, even though he usually prided himself on being able to read people. Vera must have been extremely skilled in deception. He would have been proud of her for that, except for how she'd chosen to use that skill.