Bella wouldn't yell anymore. The answer was not the one she wanted. Rather than exploding, she just glared at her sister. If anything that was more dangerous than if she had yelled. It was usuallythe warning sign before a curse was cast, but as she had no magic...
"Excuse me, Mrs. Tonks," she hissed before walking past her sister with her held high. The library would make her forget the traitor in her midst.