Been in your shoes, brother. If OM has family, out him. Tell your wife you're moving on with your life, without her, since your hard boundaries have been crossed. A very difficult time for you. Act as if you're Divorced.
Think long game. Make SURE she knows she just lost plan B. That takes weeks of action. A day or two won't cut it. Take off for a few days by yourself.
Talking here from what I should have done.
M46, EXWW46 M15 T17 D20, S19, D13 M - Addiction since 1998 W EA/PA #1 2013/2014 W EA #2 June 2015... BD 1 Big D talk 9/15 BD 2 - EA/PA disc 10/30/15 Served D 1/22/16 Divorced 5/25/16 (yes, that fast!)