P.s did it occur to you that her families beliefs are exactly the reason she doesn't want to be the one to petition for a divorce.
Now that you have brought into light the moral standing of her family. A lot more of what she is doing makes sense.
You might also consider this when our speak to her, taking off the pressure might result in her being more forth coming with telling you what she really wants.

Or has she told you and you are just not hearing her?

Maybe you could meditate on that for a while.

Take Care.