...I only know about this as my own DD follows her daughter (they are both in year 9). They used to be friends but friend's DD dumped my DD about 18 months ago and various nasty scenarios have followed.
DD showed me the insta account today because she was concerned it wasn't safe (my DD does have insta but only has 22 followers, all people she knows and all on a private account).
It's clear my friend doesn't know about the account and I'd just straight out tell her but my DD says if her DD finds out she told on her she will make up rumours and spread them round the school.
It's a safeguarding issue I don't want to turn a blind eye to, what's the best approach without landing my DD into something she didn't ask for? Notify the safeguarding officer at school?
To complicate matters my friend's family already have social services involvement due to DV, I had a thread about it recently and chose to take a step back from the whole thing as it was affecting me personally.
What would you do?