Anonymous wrote:OP, I'd keep closer tabs on what's going on. You are wise to be very concerned here. You have a warning sign.
Let her have friend(s) over for pizza making or whatever, so you can get to know them. Trouble is brewing, but you can get a handle on it.
Lots of kids with top report card grades and sports success, get a free pass to drink and do drugs, both by their parents and their school. Not easily believable, but so very true.