Bella scoffed. As if she cared about upsetting her husband. He was merely a front. That only served to show that Sirius did not know her at all.
"Well, he's not here is he? Now if you don't mind, I'm terribly busy." The words dripped from her mouth like honey, she wasn't stupid enough to show Sirius how unnerved she was being here, how scared she was of facing her Lord's wrath that she was powerless. That would just be stupid.