[WesternSwing]

I think screaminggood give some good advice on breaching the subject with a joke or off-hand comment and gauge her reaction.

One thing I would be aware of though is that she is probably acting this way because she is in a dead-end marriage and you are new and different, therefore fun and flirty. She could just be infatuated with you two because you are new and different. If she actually did get divorced she may want something completely different. Right now you are a needed break from her real life. When real life sets in with you she may not want that either. If something did happen you could be nothing more than a grudge-fuck to her, though it may not feel that way at the time. Remember, there is a reason that more second marriages fail that firsts. It is because so many people leave one person for another because they seem so "dreamy" and "fairytale-like" and everything is just so "right" when they are together. Then real life sets in and it's not the fairytale they had imagined... It's just different than where they were.