I had that same thing happen to me. Except in my case my dad stopped, put us in his car and drove her home, berating us the entire time about sex and how young we were (16/17) and that kind of thing is not allowed in his house. We were just kissing and were fully clothed with the lights on. Over-reacting asshole. And my parents wonder why I never brought her, or any other girl, home again. 