I also agree, take back your bed. Let her sleep on the floor.
Also, tell her Mom, Dad, Grandparents, siblings, friends, if this OM works with her tell the human resourses department . . . expose this affair to everyone. Don't mince words tell them that your wife is having an affiar with "OM's NAME HERE". Tell them that you love your wife and you would appreciate any help they can give you to help getting her to end the affair. Also if this dude is married tell his wife. Tell his parents if you can find them. Most people don't think it is o.k. to be having sex with someone else's wife.
She will be mad, she will scream and rail . . . but she is already shagging some other dude and spending the night at his house . . . how much worse could it really get? Your marriage can survive her anger . . . it cannot survive if she doesn't end this affiar.
