Personally I don't like her much - I think it's important to do what is right no matter what your family threatens you with. If they say get married or you can't see your little sisters anymore, then that's about that. That's something that can be worked on over time, but being allowing yourself to be coerced into anything like marriage is wrong, wrong, wrong. So she got married to someone she didn't love to make her family happy, and now she's having this secret fantasy with you. I think that sucks. Not that I'm unsympathetic, because I am, but she's got issues. Should you take advantage of that? I have no idea. You could make a pretty convincing argument either way. I say life is short, she is gorgeous, and she needs to figure out her own problems. So go for it. If you do, then you potentially are going to get pistol-whipped by her husband. If you don't, then you potentially might regret it when you're 40. Which seems more likely and more regrettable to you?