If she was really raped, this behavior could be a result of it. She should seek counseling.
Also, just because she didn't know she has a mental illness or a predisposition to it, and even though she doesn't know of anyone on either side of her family being mentally ill, that doesn't necessarily rule out that there has been mental illness in her family, that she does have a mental illness and just doesn't know it, or that she is predisposed to developing one.
No one on either side of my family had a mental illness and there was no history, yet I am bipolar. We only just recently found out that my cousin on my mother's side is also bipolar. You'd be surprised how easily those things can remain obscure for a long time.
All I can go on is what you have said here, and her behavior sounds as though she may have triggered some latent issues. 11mg of 2ci isn't a very high dose at all, but yes, as was mentioned above, we all react differently. Her reaction to the rape, if it actually happened, could also play into this.
Is she receiving help? Counseling? Is there any confirmation that this rape happened?
When I dosed 25 to 30mg of 2ci and had marijuana during the peak, I had an extremely visual and intense experience in which the trees around me turned into a black stone cathedral with an azure stained glass window up at the top. The window turned into a giant blue face, like a god, and it spoke to me. It was one of the most intense experiences that I have ever had, so the potential for a "religious experience" is certainly there, but just on 11mg?