I agree with PleaseHelp. Also, i do not know how much you know about PTSD, but there is a thing with age regression. The person can be triggered by anything from a truamatic experience. The trigger causes the person to regress to a younger age ( inside) and react as a child.
Example: I was 3 the first time I remember being abused sexually. When I see what I call "crazy eyes" I revert to the three year old and cannot defend myself or run or anything. I freeze, panic and try not to wet my pants. I have to have someone else there to protect me, because at that time, I am 3 yrs old. To me "crazy eyes" are like my dad's eyes....ice blue and crazy looking...like anger or aggression.
It maybe that some of the memories are repressed, but she is getting triggered. And yes, we are conditioned to think that we do not deserve what other poeple deserve....that is a tactic used by perps and sadistic tormentors.
Maybe should agree to allow you to go to one session with her? Whatever she is dealing with is very heavy and she is overwhelmed...from what it sounds like to me.
She may be like me, afraid of herself. I fear the rage that sits just under the surface. Someone can upset me and the anger is justified, but then in an inatnat, like a flash fire, I am engulfed in a rage that goes back adn covers all the abuse done to me....it is very scarey. Then I feel ashamed and guilty, afterwards.
I don't know if that helps, but also, if she is not get the proper therapy, then the therapy may not be helping. I have wasted alot of time on conventional therapy, only to find out that the three people that helped me where familiar with PTSD. It is differnt. If she is only being treated for one symptom, it is like putting a bandaid on a surgical would...it doesn't fix it.
Maybe you can get her to talk with you, if she is unable to talk, maybe she can write you a letter and let you know where she is atm. Just my thoughts on it. I hope you find the answers you need. And hang in there, it is a hard road, but worth the work. I am glad she has you. She needs someone.

Good luck.