I've just came home from work to my 17year old daughter and her best friend in floods of tears. Turns out her best friend is pregnant. She can't tell me when her last period was (she said ages ago) She has begged me not to tell her parents as she doesn't have a good relationship with them. Im really stuck with what to do! As a mother to a girl her age it would cripple me not knowing this. But I really don't want to break her trust as (these are her words not mine) she feels I'm more of a mum to her than her own. I really don't need negative comments as this is so hard for me. Im totally torn. Do I betray her trust by telling her parents. Or do I keep this life changing secret?