I am pleased this was caught and stopped. If she was my daughter, I would have no issue with nude photography in the proper setting and time (akin to the parents of the young naturists in France and elsewhere who happily consented to it with Jock Sturges, David Hamilton etal), but as witnessed on 1000's of tumblrs, once they are out there, they are out there (texting nudes). She, as 11, is not capable of using proper judgement in this regard.
That's my view!
-Danee