"Oh, have ou moved out on your own then?" Aurora asked, watching her, and then she realised a second later what she meant. "Or you mean, you've moved in with Barty?" She smiled. "I'm sure I'd be glad to help, if you're sure you want my assistance, I would hate to intrude."
Perfectly poised, perfectly polite, perfectly plastic. She was trying as hard as she could, reminding herself of the Order member she and Alecto had killed, focusing on that and forgetting everything else. She would get through this somehow.
She would try, she would play along and be nice and pleasant and as good as she had ever been while at Hogwarts, and stay her hand for Barty's sake.