My 16 yr old daughter rear-ended a car after school with another 16 year old driver. He slammed on his brakes to avoid hitting the car in front of him and so did she. She popped the rear end of his car...no damage to her car; we paid cash for the damage to his. One month later, we found out there was a passenger in the front seat of his car who says she is injured. She was not wearing a seat belt and hit her head on the dashboard when the accident happened. In Texas, does the passenger (16 yr old) not wearing a seat belt lessen my daughter's liability for the medical bills?