I have to agree with Clifton. Having been on the receiving end of someone cheating on you it's horrid. Billy's first response was right She's with someone, even if she doesn't respect that then you should until she decides to leave him.

I appreciate that every story is different (so please don't kill me RedAngl) but you don't really know what's happening between her and her husband do you? By pursuing her you are creating a huge bomb of hurt for the innocent people caught up in your intrigue. It explode at some point in the future and people will get hurt. Think you can live with that?