Did I do the right thing with my out of control friend?

[Island Girl]

So me and my friend have this other friend who is hanging with the wrong crowd. They are promiscuous and get drunk and steal their parents alcohol almost every weekend. She has drastically changed and is not the girl we used to know. So we got a text free app and anonymously texted her mom about the stuff she brags about to everyone and sent her the pitcures that they posted on social media. Was this the right thing. I didn't want to get her in trouble I want to help her in the long run. No one else knows we did it and it's very slim her mom or her will know it's us.

[Taurean]

You did the right thing. Now it is upto her mom (and dad) how to handle her and make her not to steal again