Unsure, if you want her respect you're going to have to earn it and command it.
Right now she has had more than one OM and you're acting like you're all OK with it. You let her tell friends that "he's just a friend" and you go along with it? What's wrong with you? Expose the affair.
Do whatever you can to break it apart. As long as its ongoing you're dead in the water. Your first step is to contact the OM's W and let her know. She deserves to know. She will take the appropriate measures to create crisis with the OM. While you handle your end.
Doing that shows your W you're not putting up with her crap any longer and you're willing to fight her / fight for the M... that's another step in earning respect.
Your acting "as-if" is useless and a waste of time while the OM is in the picture. Why? Because she's getting her highs elsewhere. Cut out the dealer.
M:11 | T:12 | Status: Married 4C's of WAS communication: Cool, Calm, Collected and CONFIDENT