My advice is proceed with extreme caution. Eva and TK are right, women will get weird and possesive, married or not and the fact she decieved you and did that then suddenly comes out getting married? The woman is trouble and anytihng pertaining to her should be regarded as suspect, especially her formerly cold and now flirty friend. The situation sounds very suspect.
I had a workplace romance with someone years ago. We agreed to keep it out of the workplace. I never mentioned it to anyone and then one day I have co-workers asking me about it. Seems the girl went drinking with several people, got tipsy and started talking about what a "raging bull" I was in bed. A month later, I got promoted and became her boss. First duty my bosses gave me was to discipline her on her performance. During this process, another woman (a friend of my sex partner) tried to come on to me. She was obviously doing it to get out of trouble she knew she was in with her superior who was pretty tight with me. Suddenly, both women turned evil on me. Why? Because they realized sex was not going to save them. I finally had to fire the one I had been sleeping with and her friend turned evil when that happened.
As for the one I was sleeping with, she continued on for a few months until one night during sex she says, "Can you fix my personnel file so I can get another job?" To date that is the first time I have told a woman to get out of my bed and my house and not worried whether she was dressed or not when I did it.
The lessons to learn here, as Eva, TK, and millionman are trying to tell you, is that you are dealing with deceivers and liars here. I would steer WELL clear friend. Be safe and careful. | 
