My exact feelings. In almost all cases they eventually cling to their wives, especially if it was a "mid-life crisis" he is or was feeling. There are cases though, where a man or woman may divorce their spouse for another person.
Vulgar, for your own well being, try to detach from this situation, it may hurt at first but in time you may find yourself feeling free to take time for what you really need.
If he divorces, then you know for sure it's over, and you are the person he really wants to spend time with, maybe even the rest of his life, but hard to tell so soon.
My mom's former lady friend was re-married, and it was to her lover she use to sneak and see while she was married, her lover was also married. Long story short, this 2nd marriage of theirs had some weak spots, they didn't trust one another, due to the fact they had not been trustworthy partners to their original spouses. This is another thing to think about.
Like seeker says, I believe can happen. I am wishing you lots of luck with this sensitive situation. Do not let it consume you. You have your life to live, and it can be a beautiful journey, well there will be some ruts along the way, but you can get past.
Sincerely,
DE

((((((((((( for you )))))))))))))))))))