Am I [37M] having an emotional affair with a friend? [28F]- UPDATE

Original HERE;
I wanted to provide a shortish update to this because I received some useful and positive advice from the original which I am grateful for and because the results of me taking some mild steps to re-balance things didn't go quite as expected, although I stress things have not gone badly.
First up, within hours of me posting the original, my FB messenger started to light up with messages from Emma on the various legs of her outbound journey. I was a bit taken aback by this because I'd sort of virtually 'waved her off' with the suggestion I'd speak to her when she came back. This is based around my own behaviour more than anything else- when I'm holiday, I rarely make contact with anyone at home. While it was nice to speak to her, it did little to address any nagging concerns I might be becoming overly close.
I haven't been with my wife for as long as I have without being honest so I spoke to her about this, the Dating.mobi post and my concerns and that, if we felt it was needed, I would break off contact altogether. My wife was/is understanding and agreed with the gist of reducing contact levels and dependency but she blindsided me by going on to say "There's no way you are breaking off contact forever though."
She proceeded to show me her iMessage interactions with Emma over the last year or so. They were mostly day to day stuff but something that cropped up routinely was Emma apologizing for 'monopolizing my time' or being overly close and feeling guilty about it. My wife has replied at various intervals that she is perfectly content with things as they have been but that if she felt at any stage that this balance was tipping, she'll let Emma know. She feels though that the basic friendship we share is fundamentally sound and important to both of us as is her friendship with Emma so she wants to ensure it remains intact.
As such, Emma has been told that we're going to take some time out from communication while she's away and we'll work it out from there. Not for the first time too, I'm left with the realisation that my wife is awesome.
Thanks again for your contributions on the original.

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tl;dr: Told my wife about my concerns about an emotional affair. Turns out, she's waaay ahead of me and we've got a plan of action.


Source.

Like sands through an hour Glass.....

Your wife is only staying friends with her to keep tabs on you. And she seems awesome to make her look good, that's why she said don't end the friendship. And honestly. ..she's probably cheating on you too.