What questions does the young girl ask Framton Nuttel? Why does she ask these questions?

"Do you know many of the people round here?" asked the niece, when she judged that they had had sufficient silent communion.

"Then you know practically nothing about my aunt?" pursued the self-possessed young lady.

By asking these questions, Vera is able to determine what type of tale she can tell, and what to avoid, so Framton will be unaware and believe her.