what to do.

My wife told me last week that she is in love with a man she met 2 months ago. We have two beautiful children, 2 and 4 years old. She left our home in february and started to go out clubing and dancing, she got in touch with a man she had cheated on me last year, now is like she has gone crazy. She refuses to go back to church with me to pray and fast , asking God to help us deal with her feelings etc. She told me she cant wait to get a divorce to be with this man. She was always a very sweet person, we had small issues, but never anything like this. In 10-2009 she started a romantic relationship with a coworker of hers, then she left our home in Janiary 2010, came back in 07-2010, left me again in 02-2011. I found out she had go on trip to Miami with another man that had been pursuing her for a while, she admitts to kissing and making out with him and another man also. Now she just bluntly tells me she loves this other man. Is like she is a total new person, I am 46 and she is 26, we have been together for 7 years, the part that really hurts me, is that she doesnt want to go to God and pray.