Behind Bellatrix, Rodolphus bit back a curse and threw his cloak into a chair, turning warily to face Narcissa. Though he made no overt movements for his wand, it could be in his hand in a second if necessary. If it came to that, however, he knew there would be more problems than that, for Bellatrix would not doubt turn on him.
The 'hellcat anger' Narcissa was well known for among those who had been the closest to her would have been better than was motivated her now. That anger had come first, but had been first set aside by Carina's desire to have everyone in eyesight, preventing her from murder, and then later reasoned with when Rabastan had come home and kept her from finding Bellatrix and Rodolphus and injuring them severely. Now, her demeanor was calm and cold, her intent near diabolical in how clear her mind was and how little hot rage she felt. It was a state that was far more dangerous but far less obvious a danger unless one did not underestimate her, which people frequently did.
"This is not a social call, Bellatrix. Nor do I intend to stay long. What I have come to say is quite short indeed and best delivered in person."