A favor?

Her brows knitted together in confusion; they barely knew each other and Miss Binns was asking a favor of her? Her skepticism was mostly born out of the fact that Tilda genuinely had no idea what she could offer Miss Binns, and only slightly out of indignation that she had any obligation to do her any favors whatsoever.

Nonetheless, she knew it was rather uncharacteristic of her to not want to help; matters pertaining to her brother's reputation notwithstanding, Miss Binns had truly done nothing wrong. But it was easier to be angry at someone she didn't know instead of her own co-workers who she knew were whispering behind closed doors. "I'm not sure how much I can help, but I'll do what I can." she eventually responded.