I'm unsure what to do. Big multi family Xmas party Saturday night and friend's DD who is 21 told my DD about her extensive drug taking. Just about everything really. I'd known she dabbled but was quite shocked at the extent. The DD has graduated and is working part time while looking for her 'dream job'. I like the DD a lot. And her mum and dad too. Should I let them know or it is it really none of my business bearing in mind the age? Please don't be harsh on me. I am genuinely torn.