His reaction is to Narcissa first - something that looks like relief and fierce joy. He doesn't have to ask to know she's his, and she's safe, eyes clear. "Oh thank Merlin."

He looked at Bellatrix, without much more love lost than she had for him. (He hid it better.) "Your husband is here, somewhere." Instead of explaining why he might not have felt the Mark, he adds, "He might be incapacitated for the moment - we're in the middle of a bit of a crisis."

He would let Rodolphus field that himself.