Bellatrix stays as she is for a long while, wand still burning into the mark at her arm. She doesn't actually move until Narcissa cries out - but she hadn't needed it, to know who'd answered her call. While her own sister had been too jarring, in her younger years, for her to acknowledge as such, Lucius Malfoy was one of those poor unfortunate souls that stuck out in Bellatrix's mind, that she'd never cease to recall for how very little she appreciated him.

That was putting it lightly. Wand lowered, she stays quiet for some time, simply regarding the two of them - silently hoping that someone else might show themselves - but they don't, and she'll just have to make do, won't she.

"This must be a joke."

...nobody said she'd be doing it politely.