this is about finding information from anyone about how to save a friend in trouble

I know this is unknown but my friend needs help. She texted a random guy on Instagram and fell in a romantic relationship with the guy...he asked to share her nudes and she sent them. The guy then threatened her to cut her hair or be in Bangs or something otherwise he'd send her school all her nudes. She shared her school name and now is in trouble. Could you please give me some information i could provide her of what to do next if her intimacy reaches her parents, her school and surroundings to protect her own self from getting into trouble? She did report all messages of the guy and blocked him....now she is scared anything happens at all since she has already noticed that he sent them to one of her friends and is going to do so more further. And her phone is locked right now by parental controls so she can't do any further work in her phone if she has to. That's why I as her best friend wanted to reach out to you for help with this. We would really appreciate it. Thankyou