What should a wife do who dislikes listening to music with her husband, who listens to it while traveling and refuses to turn it off, claiming he fears falling asleep?

Singing is forbidden, and a traveler should avoid it. The husband's justification for singing, fearing sleep while driving, is an invalid excuse. He can listen to the Quran, lectures, or Islamic anashid. If these do not work, he should stop the car and sleep. The wife should advise him, and if the husband insists on singing while she dislikes it, there is no sin upon her.