The clue is in your wife's response: "She talked about how she can just talk to oM, and he never judges her."
Reread that last sentence because it is a gift your W gave you. Copy it down, print it out, put it in your wallet and read it when your ego gets engaged.
NAIVE.
Erase the whole sentence from your mind. What it meant was that the OM will do anything to get down your wife's pants. He is her "ear." He is her best friend. He makes her feel like a princess. He agrees with everything she says. He makes her feel like she is the most important person on this planet.
Everything he does has a sole purpose.
Men do not have emotional affairs. They search out sexual partners.