Unfortunately, I can’t give distressed couples happiness on the platter of gold. I can merely give solution that works in most scenarios where sexual intimacy is threatened based on my observations.
Most marriages dissolve as a result sexual starvation and the desire to be free to explore sex aside from their partners. The guilt of being seen as a betrayer is why some people choose divorce. If a partners is cheated on and feel the need to retaliate without feeling guilty about doing it, then that’s where ethical consensual nonmonogamy comes into play.
Yes, it isn’t for everyone, but it can save most marriages from falling apart.