It is most likely that she 'doesn't understand' what's happening to you - and herself during these difficult times. It's not something that most people learn just incase they come across a Survivor.
I know my wife struggled for a while, but the more I explained the more she understood. As long as your wife is willing to understand, and if she's supportive then I would say she is, then she will understand eventually.
It might help is you were to get a book such as Mike Lew's excellent "Victims No longer" that you could both read. The new version has a lot more for partners in it.
If you want a copy go to the 'Bookstore' link at the top of the page which takes you directly to Amazon.com. If you buy it this way MS get a small %.
That sounds like I'm just plugging the book, well it helped me and my wife enormously.