Interpreter of Maladies Foreignness and the "Other" Quotes

How we cite our quotes: (Abbreviated Title.Paragraph)

Quote #10

"It's Bibi," the wife wailed. "She's done it, she's infected our child. We should never have let her back down here. We should never have let her back into this house."

And so Bibi started to spend her nights in the storage room again. At the wife's insistence Haldar even moved her camp cot up there, along with a tin trunk that contained her belongings. Her meals were left covered with a colander at the top of the stairs. (TBH 41-42)

Here, Bibi is very much the "other" even within her own family. She gets treated more like an animal than a person.

Quote #11

She looked at me, noticing my bare feet (I still felt strange wearing shoes indoors, and always removed them before entering my room). "Are you new to Boston?"

"New to America, madame."

"From?" She raised her eyebrows.

"I am from Calcutta, India."

"Is that right? We had a Brazilian fellow, about a year ago. You'll find Cambridge a very international city." (TFC 66-70)

Why does Mrs. Croft's daughter feel the need to say that they had a Brazilian boarder once?