Thank you all for you support. Seeing the photo of the two of them really hurt. I've been wanting to post on her facebook. What I want to say goes something like this:
Shame on you. You started your "relationship" with him while he was married and living with his wife. You knew that he was married, yet you pursued him. He lied and cheated on his second wife (two times) and lied and cheated on his third wife. Rest assured, he has already lied to you and it's just a matter of time before he cheats on you. You could have at least shown the common decency not to proudly post a picture of you with another woman's husband until his divorce was final."
It hurts so much to see a picture of the man I married with another woman. I am still so devastated that this has really happened. He really had the affair, he really is this monster who so quickly discarded me, threw away the life we had together. He really is this lying cheat bastard. Not the man I thought I married, but a pig.