What happens when he makes a mistake? Does she have to go along with, and support, the mistake when she could have fixed it?
The WTS say that the wife should let her husband make the mistake rather than point out a better way, because she would be usurping his headship.
*** w95 9/15 p. 21 Godly Families of the Past—A Pattern for Our Day ***Interestingly, such women of faith as Sarah, Rebekah, and Rachel also exerted significant influence in the family. Although they were submissive to their husbands, they were not restrained from taking the initiative when it was appropriate and necessary. For example, Exodus 4:24-26 tells us that when Moses and his family were going to Egypt, “Jehovah [“Jehovah’s angel,” Septuagint] got to meet him and kept looking for a way to put him [Moses’ son] to death.” Evidently, Moses’ son was in danger of being executed because Moses had failed to circumcise him. Zipporah took swift action and circumcised her son. Consequently, the angel let go of him. Christian wives today can also take the initiative when the situation makes this appropriate.
---------------------but then the WTS says
*** w73 7/15 pp. 434-435 par. 17 Seek God While He May Be Found ***Overstepping a boundary often means an invasion of the rights of others. In this instance, first Eve invaded the rights of her husband respecting headship, taking the initiative into her own hands.
*** g82 8/8 p. 8 “Surviving” the First Year of Marriage ***Some wives complain that their husbands fail to take the lead, to “carry on as men.”
*** fl chap. 4 p. 43 par. 8 A Husband Who Gains Deep Respect ***On the other hand, instead of abusing headship, some husbands abdicate it. They pass all the decision-making over to their wives. Or, while telling the wife ‘not to rush them,’ they procrastinate so much that family interests suffer.