Descender, I got out of a long term relationship by doing exactly what your wife has been doing, even down to spending all my time online talking to women and going to Canada to see one of them.
It's pretty clear she has fallen out of love with you, so now you have a couple of choices -
1) Walk away
2) Work on getting her to fall back in love with you.
The second is obviously the most difficult, she has set her mind and her heart on freedom and is being pretty blinkered about getting it. This doesn't make her a bitch or make her a bad person, she just missed out on a normal youth as a dub so she wants to reclaim her life. If you can chill out and show her she can experience freedom while still being married to you then you are onto a winner. If you make her feel like she is trapped then you will lose her forever.
Good luck