Rita smile brightly when Bellatrix agreed with her but it never really reached her eyes. "Well, we should be sure to remedy that straight away, yeah?" She nodded resolutely as if it had already been decided. Rita knew that being presumptuous wasn't the most polite thing to do but she knew she had an edge. Even if Bellatrix had no idea what Rita had in store for her.
It was impossible to keep her mind on the lecture. Rita simply stared down as if she was intently taking notes. When the note came back to her, Rita had to stifle a chuckle. Though she could sense Bellatrix's annoyance in her stiff poster, she gave no sign of noticing.
Of course, she wrote. Who wouldn't be given the sounds you were both making?