It's too late. They've already eaten her brain and turned her into one of them.
Seriously, it does sound like she's gotten into a brainwashing cult. They start by feigning unconditional love & acceptance to get her feeling warm fuzzies, then slowly convince her that she can't have any contact with the evil heathens outside the cult, i.e. her family. I wish I knew the best course of action to take, but aside from a cult deprogrammer I'm afraid there's little recourse. If she's over 18 there's no way you can force her to speak to a deprogrammer. I guess the only thing you can do is just let her know that you love her and that you'll be there for her if she ever decides to leave that group and come back to you. And hope that it doesn't turn into a crazy suicide cult.
Seriously, it does sound like she's gotten into a brainwashing cult. They start by feigning unconditional love & acceptance to get her feeling warm fuzzies, then slowly convince her that she can't have any contact with the evil heathens outside the cult, i.e. her family. I wish I knew the best course of action to take, but aside from a cult deprogrammer I'm afraid there's little recourse. If she's over 18 there's no way you can force her to speak to a deprogrammer. I guess the only thing you can do is just let her know that you love her and that you'll be there for her if she ever decides to leave that group and come back to you. And hope that it doesn't turn into a crazy suicide cult.
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.