Make sure the MC is on the same page as the experts here on SI when it comes to infidelity. Find out what books they recommend reading. Are they the same as the ones recommended here. If not, why? It's not easy to find a good MC. The first one may or may not be the right one for you. It took us three tries, four if you count his IC.
The first MC we found was okay but not good enough. She was the type who wouldn't have an opinion which left WH to believe whatever he wanted.
The second MC was completely out of his league and a nightmare. The lies WH told in there were over the top, MC fell for them and thought I was just being mean for not believing WH. I was able to confirm the lies after the last meeting and refused to go back to MC after that.
WS's IC was a POS who supported WH not going into the 6 month in treatment program WH had promised to go to because then he wouldn't have often paid for 6 months. He also made it clear he didn't care about our marriage and that I was jeopardizing WH's sobriety by being upset about the A.
WH fell off the wagon again after I quit MC and Ingave him an utimatum, ditch IC and come up with a new treatment plan that I approve of or I was done. We got advice from the in treatment program and were directed to an MC who knew what he was doing both regarding infidelity and alcoholism.
The MC was the char. Him and the fact that I was done tolerating any more crap and it still has taken more than a year of battling it out with the help of a good MC for WH to start to get it.
Go in there prepared to get your answers met about whether or not this MC is the right one for you so you don't waste time, money and emotional energy with the wrong counselor.