I stupidly read dd's (15) diary slightly by accident (honestly) when tidying up her room. I feel very ashamed of myself, however, my little innocent has been drinking/ smoking smoking dope/ and lying about her whereabouts - having thought she was having a sleepover with a friend and making cup cakes it transpires she was gallivanting about London hanging around parks etc with some pretty undesirables...until the early hours. I feel sick... I want to confront her, I am worried about her safety - also mindful of the betrayal of trust by reading her diary. Any ideas?