The current situation is draining what she found attractive in him in the first place. It also enpowers the other male.

I am also a fan for doing some non-traditional things, not in terms of payback or creating jealousy, but for restoration.

Whats funny with this world, if enough social mixing and interaction with the opposite sex, but back enough mojo that the wife can find new attraction with her own husband.

I'm also a fan of knocking the OM out of the situation, I discussed in some other recent threads. It should be done or at least attempted.