Just be a friend to her. Not a friendszone friend but a friend with sex appeal. Occasionally point out the bad in her man. Find another girl in the meantime (Big Plus) treat her really good and let her see it and subconsciously and consciously she'll compare it to the way her man treats her. Talk about your bf/gfs together. Talk about how your relationship is not that serious and how you're kind of waiting for the right woman to come along. Don't speak bad on your mrs right now for she will think that's how you'd talk about her if she was your girl. Always take the high road. Do boyfriend things for her even though she's with the other guy. Ask her to coffee or breakfast dates or other low key things. Give her birthday presents/christmas presents. Buy her other small gifts occasionally. Show her that you think about her like that. Tell her that you think she's sexy in a nonthreatening way so she associates that feeling to you. You may even want to talk about how great your sex life is with your mrs right now. Just don't get too graphic as it might put her off. Don't ask her about her sex life though. She'll tell you what she feels comfortable with. Damn I miss being a player. I'm retired and married now but I still got skills. Just use them on the wife these days. Good luck player.
Its not going to work and if it does she won't want to be with you due to her heartbreak. Don't be sly because that will come back and bite you in the ass.
I don't know how you'd break them up without a lot of drama. Even if you did, she's going to be hurt over him (more than likely). I know that you don't want to hear it but you need to focus on something/someone else. I'm assuming that she doesn't even know that you like her? Nothing good will come of this right now. I think if you try to play the friend card you're going to make a fast entrance to the friend zone. Say hi, smile..basic things for now or settle for just friends.
Oh dude, you're going to get so much grief of all the holier than tho posters.
But trust me, most people would have an affair if it was offered them, and the other person was hot, and the chance of getting caught was low. People have to keep up appearances you know. But behind closed doors.
Dude, you just sleep with her behind his back and watch them split up. But you better be pretty handy, as he will want to whip your ass. If you are, go for it. If not, I wouldn't chance it myself.
if you have any success let me know... I've been wanting to date this girl for a long time - every time she sees me she seems really happy, but she's been with her boy a long time. It looks bad if you just bad mouth him or w/e so I have no idea how to go about it, hopefully there are some helpful hints given here.