That person you are holding as a spouse is ultimately God's child.

How can you covet God's child? Be thankful for the time and for as long they consent to stay with you.  Read 1st Corinthians 7.  So relax if they get a little covetous of other people's spouses on the cruise and ask you to hug you or look at you  like that uh that one or to wear the cologne like uh that one.  It could be that they have been trained to just shop.  But, she shopped you and she will remember again her prayers once you stand beside that other one in the coffee or buffet line and she feels in her memory the last time she uh called your name while washing your clothing or making that appreciative cup of tea.    She never did that before for anyone else or at least not soo often and you just eat lots of carrots. It's more than a back rub. You change light bulbs and seem to understand.  You also seem to have the right height and size feet for her image addiction.  It is a very fine balance and its best to appreciate that fine balance since the other guy might have 20 % of something anybody could offer but your spouse has the full fat 80% that is irreplaceable.   You will appreciate it after you forget while letting go and God re-assigns him to some distant cousin five kilometres away. So, read Matthew 19 and do not covet God's child because as soon as you do, you find that you are without your real comforter; the Holy Ghost. Abraham and Moses showed us that nothing God gives us will be allowed to proceed our personal relationship with Jehovah to, in effect, be in idol in our lives. God must have His suzerainty in our lives. Solomon was warned about having one too many wives that would turn his heart away from God.