"I'm too little," she said. "Mommy says most wolves have their first Change when they're teenagers. But since me and Logan are special, we might be younger."
Or they might not ever turn, despite having the secondary characteristics already. Anything was possible and no one knew what to expect with the twins since they were born of two bitten wolves. Especially Kate, since she was the first born female.
She realized that she probably shouldn't be getting in a stranger's car, but so far he hadn't tried to hurt her and she was hungry and needed help finding her parents, so... "My name's Kate. What's yours?"