Hi Rico..I'm sort of in the same boat, although my husband is "just" bipolar and hasn't had the same kinds of problems your wife does. We have only been married six months, known each other for 2 years total...and he went hypomanic on me (something I had never seen him do) and had an "emotional affair" that could have easily been physical. I didn't even know him while he was in that state. It has been very confusing to say the least.
We got him to a pdoc last week and his meds got adjusted, and now he seems more like "himself", but the whole episode has raised a host of issues about our marriage. I agree with you that there is not much you can do about your marital problems until she gets help with her psychological stuff.I am hoping that with his doctors' help he can sort out exactly how he feels about us, our marriage, relationships in general, sex, and a host of other things that he has had some very twisted view about all his life due to his bipolarity, and his denial of his illness.
The only thing you can do is what I am doing. Do your utmost to get her the professional help she needs. Be there, be loving and supportive as you can be, and realize that whatever is going on with her, it has NOTHING to do with you and EVERYTHING to do with her illness.
Of course, somewhere in there you have to decide just how much you can personally put up with. May I suggest you get some counseling of your own to help you deal with all this. I am on my way to my own couseling appointment this morning ...you have to have some outside professional help yourself, preferably from someone who also understands the type of problems your wife is having.
For myself, I will hang in there and educate myself about my husband's illness as much as I can, and unless he strays again, I feel I can "handle" a little insanity. ( I find "normal"people somewhat boring, alas. I seem to attract slightly "off" , creative people , go figure

)