If she doesn't know he's married....if/WHEN she finds out, she may very well flip her lid!

Just because he's willing to show you his phone....doesn't really mean squat. Its only two weeks in so this "emotional affair" is probably still in the innocent phase. However, at this point, he knows that if things go too far, he's going to have to delete the texts. I wouldn't put much stock into the fact that he's shown you the messages up to this point. (And, he may have been thinking ahead and may have been deleting the ones that go to far all along!)

Its quite telling that he says he doesn't believe in emotional affairs! (This is EXACTLY the kind of person who is liable to fall into one. That is, "cheating" is only sex....Uhm, nope! The emotional part is by far more devastating.)

I hate to say it, but I meet guys like yours.....forms "friendships" with women but fails to mention the fact that they're otherwise attached. Guys don't get it....I don't want to know if they're married/engaged/whatever so that I can move in, I want to know their status so that I know my own personal boundaries. I won't EVER push the boundaries with a married man. (And this is precisely the reason I only have 1 married male friend......he's the only married guy I've known who keeps things strictly on the friends side of things.)

Can you drop by his office in order to surprise him for lunch? Send him flowers? Anything to make it clear to this other woman that he's married? I hate to say to resort to such *devious* means, but TBH, if he's not willing to tell people.....WOMEN.....that he's married, I think your marriage is over.