I don’t know what to do. I read DD 15’s diary and found out her friend has been boating about her sex life and apparently her friend is into BDSM. She is also 15. I’m so confused as to what to do, so I tell her parents? This friend comes over often and I do know her mum. I won’t go into detail about her dairy but that’s the gist. WIBU to tell her mum?