sorry, hijack to Jacey: what is an infidelity counsellor???? I don't know. I am probably quoting Linda J MacDonald if I said that - she gives the swiftest and most direct kick to the nuts of people who betray their spouses so I like what she has to say:
infidelity is TRAUMA and one of the worst human experiences
do not underestimate the damage you have caused
life is no longer about you
if you want to heal your marriage, you are going to have to put your spouse first until they are soothed and comforted enough for you and THEN you can deal with any marital issues that caused vulnerability
It takes two years from the last lie to heal - so get absolutely honest and transparent or you will lose your M
nice and straightforward I think
My IC IS unethical
- gay, flamboyant and a touch narcissistic himself! 
I am fine with it because we have developed a rapport over the last 3 years - I said to him, 'do you normally speak to your clients like this? He said 'no: but you can take it'. My last therapist told me I was incredibly honest and brave, so I sort of got it. I really did need to be hit over the head with that 4 x 2 to be honest.
(Just to prove human stupidity is boundless, I saw her as a young person to deal with my narc parents, she WARNED me not to marry H, 20+ years later I am now seeing this IC because of the damage of narc H. Imprinting or what?)
Walkacrossthesand, a very good book about narcissism is 'Enough about you, let's talk about me' - Les Carter ('requiring a narcissist to become non-narcissistic [see your point of view] is an exercise in futility'). Also, Eleanor Payson 'The Wizard of Oz and other Narcissists'. They both talk about, instead of trying to get the narcissist to change, to keep on to your sense of self, detach from the power struggle and give them firm boundaries.
Good luck.