So if the husband orders his wife to commit adultery, she is to obey the command? And yes, that could happen, some guy may get off on that.
What about murder. Suppose he tells his wife to kill another person. She has to obey?
And you're saying she should separate if she can't obey. What if she doesn't want to separate. Maybe she loves him. Should she still obey these commands?
Most everything she is to obey, as unto the Lord
“Wives, submit yourselves unto your own husbands, as unto the Lord.”
Ephesians 5:22
I believe that this verse applies to wives as well
“Servants, obey in all things your masters according to the flesh; not with eyeservice, as menpleasers; but in singleness of heart, fearing God: and whatsoever ye do, do it heartily, as to the Lord, and not unto men; knowing that of the Lord ye shall receive the reward of the inheritance: for ye serve the Lord Christ.”
Colossians 3:22-24
Nabal is a great example. Considered churlish and of evil doings, but Abigail being a good wife still follows and obeys her lord, her husband, even protecting him from harm.
“Now the name of the man was Nabal; and the name of his wife Abigail: and she was a woman of good understanding, and of a beautiful countenance: but the man was churlish and evil in his doings; and he was of the house of Caleb.”
1 Samuel 25:3
“Now therefore know and consider what thou wilt do; for evil is determined against our master, and against all his household: for he is such a son of Belial, that a man cannot speak to him. Then Abigail made haste, and took two hundred loaves, and two bottles of wine, and five sheep ready dressed, and five measures of parched corn, and an hundred clusters of raisins, and two hundred cakes of figs, and laid them on asses. And she said unto her servants, Go on before me; behold, I come after you. But she told not her husband Nabal.”
1 Samuel 25:17-19
Outright sin is the only arguable exception to obedience, like murder.
“And the king of Egypt called for the midwives, and said unto them, Why have ye done this thing, and have saved the men children alive? And the midwives said unto Pharaoh, Because the Hebrew women are not as the Egyptian women; for they are lively, and are delivered ere the midwives come in unto them. Therefore God dealt well with the midwives: and the people multiplied, and waxed very mighty. And it came to pass, because the midwives feared God, that he made them houses.”
Exodus 1:18-21
or idolatry
“Shadrach, Meshach, and Abed-nego, answered and said to the king, O Nebuchadnezzar, we are not careful to answer thee in this matter. If it be so, our God whom we serve is able to deliver us from the burning fiery furnace, and he will deliver us out of thine hand, O king. But if not, be it known unto thee, O king, that we will not serve thy gods, nor worship the golden image which thou hast set up.”
Daniel 3:16-18
But we know sin by the law, it shouldn't be something arbitrarily felt.
“What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.”
Romans 7:7
an example in a book my wife read recently, had a husband sexually abusing his child or step-child(can't remember which). this book clearly promotes the subjection of wives, and it said that in such a case the wife should just call the police on him. Which I thought for a while biblically, and came to agree with the author there. There are horrible situations like these that make you think deeper about this question...
sorry if this was long to read. I like to have scripture to back most every belief, it's a nitpick of mine and probably makes my writings seem tedious at times.