Potato, You need to make her understand that this is a life and death, or staying or leaving issue for you. "I don't know" doesn't cut it. That is the answer a six year old gives. If you think that you can not live with a woman in her condition who is UNWILLING to do anything about it, then you need to tell her the issue is serious enough that you WILL leave over it. IF you are not willing to take a walk, then I doubt she will ever have the motivation to change. You can not make her change, but you can surely provide some good reasons to. Do not bluff! Again, you are not talking about having it fixed overnight, but she has to make some motion, counseling etc. Again, what would you do if you found out she was having sex with the pool boy, mailman, and the UPS driver? In my mind, this is just as serious.