Hi Opio,
I hope the appointment goes good today. Clean is right in what she said, go in their with your head up, and share honestly with the therapist about your feelings. I know your wife has lots of issues going on, sounds like shes in denial of her own behavior, or actually incapable of seeing it? Its weird stuff !
I respect you very much for putting the effort out there, and I hate to go down the road but if it comes to divorce then at least you tried, did the due diligence on the marriage. I will be thinking about you today, fingers crossed.