The snotty girl will eventually give up. This is an endurance game and Pam is not really going to like being in the middle of a cat fight. I think for your daughter and Pam's sanity, your daughter should stick to the classic "butt out, bug off, mind your own business" lines. The snotty girl is annoying Pam for certain and you don't want to subject this poor girl to anymore of the snotty girl's stupid antics. Your daughter steps up her zingers, snotty girl resorts to meaner things, Pam is driven to a life of hard drugs... (Joking) Where does it end?! Snotty girl will EVENTUALLY learn that acting snotty gets her butt shunned. Your daughter will learn the same lesson without being shunned herself.