In college I dated a married woman. However I hadno idea she was still legally married as when we met she claimed her ex-husband had died. One day a few months later she told me the truth that he was still alive and she had meant 'he died in her heart'.. Still I felt guilty and you should feel guilty too.
In today’s time, it is rather simple to get divorced. We live in a time where divorces are normal and it’s a mere trip to the courthouse to ask for a divorce. With that being said, married people should make decisions to determine who they want to be with. If a married woman dates other people on the side, then both she and the other people she is with are hurting her family.
If she has children, then you and she are hurting her children. Plus, you are the victim too because many married people who have affairs will often tell their boyfriends or girlfriends that the marriage is over or will explain how terrible the spouse is. However, usually the person is lying and really is using you too.