Bellatrix smiled back at her husband. She was pleased that he was enjoying himself, even if she didn't necessarily approve with going through all of this trouble. Abbott was a lost cause, she could see that as plainly as anyone else, and she didn't know why they were going through all of this to deal with him rather than just torturing him to death and being done with it.
"You think a great many things, Rodolphus Lestrange, and often they are inaccurate. What were you doing in there with the Mudblood?"