Well, you guys should have a strong relationship, in our case, i believe we have a solid marriage, even with a baby now, we are pretty happy with the way everything has happened. You guys should trust each other very much, and if not, then it wouldnt be a good idea to try this lifestyle. It also goes without saying that you should love each other, as after all of it, you have each other to go to, versus what your wife/gf has with her bull/lover, which is strictly sex/carnal.