Missteps by her, her parents, the coach, Royer or his parents or some combination of all of them?
If she sent him a nude image while she was underage and it was found on his cell, Royer might be charged. If he disseminated an image of her like that, he's in a world of shit. I don't know how it works if he had disseminated an image of her after she was 18 and not one when she was under 18, and I'm assuming there is now a breakup, and they were an item and that both parents knew of the relationship. The last part isn't really a factor but could most certainly influence a jury.
Sorry, that's my police/law brain working as if I had to testify. I need to know what was going on from the start until this very day, in detail to come up with a charge.