You can't get her on your side. You do have to make enough changes to make you a better husband, partner, father, etc. Then if she comes to your side it will be on her own.
Don't think that b/c she is a psychologist you think she'd be more willing to fight. In some was they are less willing. I will say that being married to a psychologist presents a unique set of challenges. My W is a Neuropsychologist. If she is a Ph.D, then she may look down on DB or dismiss it as pop psychology. It doesn't help that MWD writes for Psychology Today. Or that DB's efficacy has not been subjected to a peer review (that I know of).
So beyond not letting her know about this place. She may actually look down on you for suggesting this.
Ultimately DB is for you but I will tell you that you have to be genuine in your effort. Psychologists have a pretty good BS meter.
Patience is bitter, but its fruit is sweet. --Jean Jacques Rousseau.
