We're both in our late 30s so not children. She has been seeing a married man for over 4 years now...apparently his marriage has been over for years, its just a matter of when and how to leave, blah blah blah. He always has an excuse why not now, somehow manages to keep stringing her along; to me it's all a lot of bullshit but she wont hear that. I want to turn up on his doorstep and confront him. Really want to, it's totally destroying my sister waiting for him. But | know I can'tplay god. It would be unfair to tell his wife. Would it?? What can I do??