I see something good here:
She said everything they teach is 100% true
I was once convinced like that too. I had the idea in my mind that the Bible is infallible, because it said so. So in the end when I found out it was not, it was all clear to me. One failed prophecy, one contradiction, one time Jehovah did not follow his own principles and the book proves to be just an ordinary one.
And the same with the org.
So if she is that convinced, she might just need a little spark of light one day.