having an affair with a married guy

Boy that is a tough one, I had a friend who was in this situation, she was not really happily married but that she had thought things were fine, until she met a guy she worked with and he really got into her and she got into him. Things were going so well that he was planning on leaving his wife, who was pregnant with their third child, and apparently he had cheated on his wife before and still did not leave her. She was married to but was looking at purchasing a home in a different state so that she could leave her husband and live a new life with a guy. anyway, things got blown and the wife found out she called my friends husband and well, to make a long story short, she is still married to her husband and living a life she did not want to live but is not wanting to start over at this point now. So that is the story with that one.