When 18 year old Jared arrives home, after the agreed-upon curfew, parents need to be awake, and ready to discuss his disobedience kindly but firmly.
Since Mom was confused about whether there was a solid understanding of curfew time, that's the first order of business. Mom could say, "Jared, what it your understanding of the time you should be home?"
Read Paula's entire article How to Handle Curfews for Teenagers
Paula Fellingham, our official Strengthening Women and Families Expert