Re: Wife's Emotional Affair, like a big brother
The other posters are correct. Sometimes, it takes time for a disloyal spouse to admit how wrong their actions are/were. And until they admit it, they will insist that they're "just friends", or "nothing happened", or anything else to minimize their wrongdoing.
Pay no attention to it and run the 180. Spy on her to verify that she hasn't gone underground with him. It's unclear whether she's simply lying to her, or whether she's rationalized to herself that her actions are/were innocent. If she's lying to herself, she may see no need to break off contact with the other man.