Divorcee.

I have been dating a guy for the last 4 months and I have known him for 6 months. He is in the process of getting a divorce. Him and his ex have been split up for almost 2 years. BUT she refuses to sign any paperwork for the divorce and is basically saying I'm dating her husband. I know by law this is true. BUT she makes it look like I stole her from him and I'm some evil woman.. But I came along way after they split up. Am I still a bad person? Not sure what to think of it, any advice?