This guy is married too but separated for 6 years with kids and he was talking about divorcing and marrying her.
Do you have any independent proof that he has been separated for six years? You may find that his wife is totally unaware of that fact, and that he is simply catfishing your wife!
So now we have started the divorce process and they still haven't met AND he still hasn't started his divorce process. So now I'm wondering if he is just playing her or something.
You and anyone else with a brain will be thinking that. Your wife's desperation for it to be a reality is the only thing stopping her from asking the obvious questions.
If you have some information about him, get a private investigator to do some research on him. They can do all kinds of checking online, and give you a clearer picture of his real situation.
Neither one has met one another in person because they live 1000 miles apart.
And yet they know enough about one another to want to get married?
They sound like a pair of immature fantasists whose online bubble will be burst by reality.
You are not to blame here. If your wife felt lonely, she should have told you. She made a conscious choice to tell a stranger a thousand miles away. So who is the victim? Her, or the husband who trusted her, and moved into another room because he was being considerate about his snoring?
...he mended her broken heart and so she gave her heart to him.
...She also was afraid that I might win her heart back and she doesn't want to risk that hurt again.
Why was her heart 'broken'? "Afraid"? Where is the 'hurt' coming from? Every relationship can have 'flat' spots. How many adults try to spin them into 'heartbreak' that justifies a divorce? The reason it makes no sense to you is because it makes no sense. And if it makes no sense, it probably isn't true.
The truth is more likely to be that this guy tried his luck with her, she responded, and now she has to portray herself as the victim because otherwise it makes her the bad guy, and you the victim.
The other odd thing was she continued to sleep with me during this and she told me that we had the best sex of our entire marriage.
So...She gave her poor, frightened, broken heart to an unattractive stranger she barely knows, who thinks it is fine to intrude on other peoples' marriages, yet despite her great love for her white knight, she was happy to cheat on him by having 'great' sex with you?
Seems to me like she is a deluded attention junkie who will do anything for a fix, including playing you off someone who may be leading her down the garden path. He provided the emotional ego kibbles, you provided the sex.
The term for that is 'cake eater', based on the old saying about wanting to have your cake and eat it too.
There is a saying in this forum: to save a marriage, you must be prepared to lose it. Which means no begging, no pleading, no "I can do better". That simply does not work, as you have seen.
Instead, what I would say to you wife would be this:
I am sorry that you feel the way that you do, but I now accept it.
You are a free person, and you have to make the decisions that feel right to you, just as I will make the decisions that feel right to me.
So I am making you aware that if you leave the marriage for this other man, there is no coming back.
Not in a week. Not in a month. Not in a year.
When you leave, you leave for good, and you need to be 100% confident that you can build a new and happy life with that man, because if it does not work out, you will have lost both of us.
Let her mull that over. If attention and having two men fight over her is so rewarding for her, the prospect of losing both may show her the reality of her situation, and bring her to her senses.
And if she goes, the wheels are going to fall off that wagon very, very quickly. So be prepared for her to show up on your doorstep in tears, telling you she has realised she loved you all along.
Call her bluff. It will turn out two ways:
1) She really wants a divorce, in which case nothing you do can change that, and you are better off letting her go than living with her blatant cheating.
2) It is all a ploy to get attention from you, and as the reality of divorce looms, she will waver, and start asking you if you are sure it is what you want (after she initiated it).
The worst thing to do would be to continue to be played off against the other man because she likes having two men chasing her.