Disappointed

I'm sad and disappointed because I thought I could trust my 16 year old and found out that I can't. She left school to come home for lunch and had 2 friends in the car (state law allows 1 passenger). She has lost driving to school privileges for awhile, since I can't trust her. Yes, I know she can still leave campus w/ other friends, and I also know that probably all her friends are doing it. However, it does not make it right. It's disregarding the little things that can lead to much bigger troubles.