You can't fix what not broke, the therapist will or should help you understand this side of you, that is why your wife must go with, you so she can learn that there is nothing wrong with you, she might find out something about her self, and that is the problem. You can't stop being you, before I started to be more me not just at home, but at work, there was time I was just mean. My boss has noticed everyone has notice. No one should have to be who their not.
