Interesting thoughts about performing with one's S. O. It hasn't been a problem for us for some years. A while ago, I finally admitted to myself that Kris just plain had a better ear than I do, so if we disagree, she's almost certainly right. So when we disagree on how to do a song, I fuss for a little while, then shut up and do it her way.
No, ladies, I don't have any unattached brothers. And the above applies only to music, in any event.