I am not sure saying "I have something more important to do" is being a rearhole. To me it projected high value. "We are wasting our time on MC, so I have found something more important to me to do."
The problem with trying to not be a jerk in every facet is that no matter what you do or don't do the WAS will not like it, think you are being a jerk, and at a minimum accuse of being one anyway. So trying to filter everything you say and do through a jerk filter is a waste of time.
This is especially true with husbands. Female attraction follows closely behind respect. They have to respect you first, then they can be attracted to you. Being firm, being a bit vague, leaving some mystery and intrigue is paramount to not being a jerk. In fact, most LBHs default way too far to being too nice, not being a jerk. So swinging a little the other direction isn't going to hurt them.
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018