^^ The club scene offers more meeting opportunities with the opposite sex. Even if the wife didn't mean to "meet" anyone at first, the club scene offers that opportunity. Let's be honest here, most guys go clubbing to pick up woman, married, single doesn't matter. As long as the woman gives consent, the guy will go for it, if given the opportunity. True, if she is unfaithful to begin with, she will find ways to have an affair. I'm just stating that the club scene will facilitate the urge to want to meet new friends...