I know this is a tough position for you to be in, but I am still learning one thing over my 54 years of life......when I have a gut feeling about what I should do about something....I HAVE TO ACT ON IT....because if I don't, I always regret that I didn't do what my inside voice told me to do. Everytime I try to second guess what that little voice is saying & try to logic my way out of doing what it says, I ALWAYS regret it.

The teen will definitely react.....they always get angry when they feel someone is controling their lives.....we still feel that way as adults....however, there is a long term effect when later on in her life when she looks back at the situation & is grateful that someone cared enough about her to take a positive action & protect her from a horrible situation.

I guess I would start by talking with the parents....they are the only ones that have any actual CONTROL over the teen (as much control as parents have over a teen....lol). After that, you might in the future talk with the teen & explain what it was that you heard to create the reaction you had against the person, so that she knows the WHY for the warning.

I know you will do the RIGHT thing,
Debbie