You might want to let her know that if she ever needs a safe place to escape to, to feel free to call on you. I wonder if there are any non-governmental organizations to which you could refer her. It is frightening that probably most of the options one might be able to offer her would enmesh her in a living hell of governmental abuse. I wonder if there are others who are as concerned as you. If so, it might be worthwhile to "pay a visit" on the potential abuser just to let him know that he is not invisible, and that if anything happens to this small and innocent person in his care (I assume it's a "his" as "we" tend to keep all that good stuff to our gender for the most part), he will find himself in some circumstances that he doesn't even want to contemplate.

Hard stuff. The typical answer would be to "call the authorities," but... well, fortunately you're not typical.

I don't envy your position.

- NonE

addendum:

I keep coming back to the idea that children are people, and while you may think you know what is right for her (and you may be right), it is still only proper in my mind for her to make a decision unless force beyond her means to repel is being applied. That being the case, I'm wondering if it might be possible, and if you might wish to, find a means of engaging her in an environment where she can experience different ideas and learn to model different behaviors. Perhaps offer her a job of some sort, or see if she might be interested in some activity in which you also may participate and in so doing be in a position to let her see another view of the world. ... ? Just some more thoughts.