Hello sadmama. Can I just add a differrent slant to this please. A niece of mine asked to do exactly the same thing very recently. She's the same age as your daughter as well. Obviously, you can't physically restrain her from leaving the house, but in our case, her parents were just as horrified as yourself. In the end, they allowed her to go, on condition that she kept in contact with home. As it happened, it started to sleet and a wind got up, so at gone midnight, a little voice was calling for her father to pick her up, which he did. As promised, she hadn't been drinking, and as far as anyone knew, hadn't been smoking anything either. If you give her some free rein, but explain why you're so worried - naturally - I'm sure that she'll grow to respect your wishes. x