Had they been through just a bit less together, Bellatrix might have been worried by that icily calm demeanor, but this was her sister, and she could not see how Narcissa could stay truly angry at her for long, no matter the circumstances.
"I know, I know..." She went to pick Rodolphus's cloak off of the chair, folding it neatly and sitting it back there before continuing. She couldn't shake her feeling of nervousness, as though something awful were about to happen, and she didn't like it, particularly after they had worked so hard to plan the New Years attacks and after the celebrations that had happened since.
"So you're angry about what happened with the traitor's daughter, I understand that." She turned back to face Narcissa, her face still composed with a neutral look. "But you must have suspected that I would be forced to act when I was told nothing about who the stranger living under your roof was. THat bastard could have hurt you or Bastan, and I won't have it. And now that I know..." Her eyes flashed with something before returning to a calm, neutral look. "How could you, Cissy? He betrayed us! He ran away and faked his death and displayed more cowardice than I've ever seen in my life! And now you're here on his behalf because he's too frightened to fight his own battles, turning against your own sister to take the side of a traitor. This is MADNESS."