It probably really doesn't bother him because he doesn't love her and she doesn't love him. Polyamorous shit only works if you aren't in love, cause otherwise it would break your heart. What I wonder is, why do people settle for that? I guess out of convenience and sunk cost fallacy, but it's still sad. Wouldn't you rather have a wife who treats you like a king and who is completely satisfied by just you? Settling for anything less than that is just a waste of time. Wasting the best years of your life on some hoe who doesn't even love you just cause she's out of your league is cringe and definitely the kind of thing you regret big time on your deathbed.