We are not disagreeing with your decision to do exposure. What we are doing instead is stressing the key point that the WAS has to make the decision on their own to end their affair. Not from you. Not from anyone else. That is the difference we're trying to point out here.
I am with you that you are NOT responsible for their choice to engage in an affair, but do own your part in the M's breakdown and do what you can to reflect on what changes you can do to improve yourself as a partner, husband, and man.
We all are praying that your W will come out of the OW fog sometime soon.