I had thought about you contacting OM's W......but the OM has much more to lose in the M. If you tell his W and she kicks him out.....then he'll go straight for your W.
If he's worried that his W will find out about his playing around, then he will lose his meal ticket in fancy places. Just my thoughts.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!