I'll second Zues on this. My W continued to lie about her EA/PA, minimizing and manipulating every chance she had. I believe she sincerely tried to end the A once, but ended up getting sucked back in. She is still addicted and will stay that way until reality smacks her in the face.
Women in this scenario will continue in limbo indefinitely until you draw a boundary, thereby removing yourself from the crossfire. You cannot talk her out of anything or change her mind. You must protect yourself and you must determine what you are personally prepared to tolerate.
Sandi will continually tell you that this is not the woman you married. It really isn't. Right now, she is someone else. Thinking about her in that light may help you detach. We'll stick with you Mr Me. Wishing you well.
Me:29 W:27 M: 4 years T: 5 years No children S: 7/7/15 EA: 7/7/15 BD/"I'm done": 7/15/15 MC: 7/7/15-8/21/15 (failed) PA: 8/29/15 W Files for D: 9/9/15 D will finalize in 60 days