Not sure IC can 'change' a person. It can only happen IF they realize they have a certain problem and humbly ask for help overcoming it and the C is very competent, most are not. Same is true for MC except it is even more difficult with 2 people involved. Seems to me that IC and MC could make the M worse or at most no better unless the client(s) has the proper mindset going in to it. If for example you go into MC pointing fingers at the spouse there's not much hope of it working. If your W actually has NPD and she does not believe it the IC would most likely not change her one iota. Please understand this is just IMHO after I've read a lot here and elsewhere and insisted on IC and MC myself and been appalled at the outcome - others may have a different experience or opinion but seems to me that IC is no magic bullet. I've seen people here go thru' extensive IC and MC and then end up filing for D against their spouse because they started and ended with their fingers pointing at their spouse. And without 100% commitment by BOTH marriages are doomed to failure.