"But what they didn't realize was that my mom and dad divided everyone they met into two categories: Our Kind of People and Those People. The ones who were enough like them to earn the jokes and the invitations and the we-must-do-this-again-sometimes, and the ones they kept at a polite distance because they were just too different. And even if you looked like them and spoke their language, one careless word could transform you from an Us to a Them forever. Maybe even if you were their daughter."
Quicksilver by R.J. Anderson, pg. 110