The Guy tried to cut corners on his insurance with his OWN CHILD! You owed him nothing. You payed his dues for him. He loses.
WHen my kids were new drivers my insurance tab was 450 a month 10 years ago. For basic. I fixed their cars myself anf the insurance paid to fix who they "met". It only happened once. I repaired and the boy helped. The boy really didn't like working with good 'ol Dad. "I said 13 mm, AJ, it's stamped right on the friggin' wrench!"
