This reaction is not in the least unusual. One of the problems with abuse is that the victim soon loses any shred of self confidence, and a significant connection with reality. They are convinced beyond a doubt that they are responsible for the abuse: " If I wouldn’t just (fill in the blank) he would (love me/stop hitting). There are abuse survivor groups and there is help for her, but she has to be willing to go, and she will have to overcome the voice in her head which continues to blame her or convince her that she is part of the provocations. Loss of self worth, loss of dignity, and the loss of self confidence are not minor issues; they are massive and very difficult, if not impossible, for many victims to overcome.
She needs far more than information from a priest. Information is not the problem; answer the information issue and another issue will simply take its place.
I have no idea if you can help, but you may be the only lifeline this woman has; you may wish to explore the matter with a survivors group, or find a counselor who specializes in spousal abuse and see what, if anything, you might be able to do to get her the help she needs.
Realize also that the demons she faces may be a total mystery to you. You likely will find this very frustrating as it will not make much, if any sense.
And be careful. I have no idea of the proclivities of the spouse, but some of them take less than kindly to what they perceive as messing in their marriage.
God bless you, and pray. And then see if you can find people who actually understand the dynamics at play and see if you can find a way to get her to real help.