I agree, but I think I need to stay away from confronting her regarding any of her new "friends". All it does it set her mind on pursuing it more as it is taken as control.
First of all, the whole "You're too controlling!" thing is just affair fog B.S., so I wouldn't worry about that. I do think there are ways to convey that "I am NOT okay with this!" without having to continually confront. But completely backing away from it does send a message that you're OK with it, in my opinion.
We all say (as you did), "Well, I TOLD her thus-and-such, and she knows where I stand on the issue," but the truth is that they also judge us mostly by what we DO (and DON'T do!!), and not what we SAY.