That your wife is willing to get help is a positive sign, The things that you describe suggest that there may be something more than OCD going on and it needs to get checked out by somebody competent. I would definitely try to get a second opinion is your system will allow it.
I have found talk therapy can be helpful if the person is cooperative. In the case of my depression it was going no where, so I sought out some other ways of support. Regardless healing is a process. Your wife is so fortunate to have you in a supportive role.