Here's another perspective. When our spouses check out of the marriage, we LBS believe that they still owe us loyalty, commitment, etc. However, if they truly have checked out, particularly if they are dating someone else, then they don't feel the same and we are competing for them again as if we were not married. It sucks, it shouldn't be that way, and only you can decide if you wish to compete for your wife's love which you already thought you had an exclusive on. But, I think that's the reality that most of us face. Of course, that doesn't mean that your spouse should get the benefits of being married to you either, in the meantime.