Social...caterpillar?

11-22-10 8:53PM My sister Lisa almost never invites people over. She rarely goes to her friends' houses. Excepting birthday parties, she never goes to play with people outside of school. She's out of school for Thanksgiving already, so today, her friend Linda is over for a sleepover. It's good to have her over - she keeps both my sisters occupied, but that's not the only reason, or even the main reason. It's good to see Lisa having fun. She's not a social butterfly, so that makes her a social...caterpillar?