You're a newborn vampire. James made you in a last attempt effort to hunt Bella.

You weren't aware that there were any laws because James failed to mention any, so you accidentally risked exposure because you've been hunting without a concern.

When you and James were brought to the Volturi, you were shaking violently, and he had a tight grip on your arm. Demetri noticed how badly you were shaking and was intrigued.