1 Peter 3 is mainly used to tell a wife to submit to her husband. Here is the passage:
"Wives, likewise, be submissive to your own husbands, that even if some do not obey the word, they, without a word, may be won by the conduct of their wives, when they observe your chaste conduct accompanied by fear. Do not let your adornment be merely outward—arranging the hair, wearing gold, or putting on fine apparel—rather let it be the hidden person of the heart, with the incorruptible beauty of a gentle and quiet spirit, which is very precious in the sight of God. In this manner, in former times, the holy women who trusted in God also adorned themselves, being submissive to their husbands, as Sarah obeyed Abraham, calling him lord, whose daughter you are if you do good and are not afraid with any terror." - 1 Peter 3:1-6
Okay, with that passage in mind, what about these situations? What if a husband wants his wife to sell herself to pay for his dope? Maybe he decides he’s into wife-swapping or something. What if he’s asking her to lie about her income to the IRS? What if he’s asking her not to tell the rest of the world that he’s beating her? What if he’s asking her to take drugs with him? What if he’s not letting her go to church or Bible studies?
Numerous things could be stated here. There are so many what-ifs.
But this scripture is clear. A wife is asked to submit to her husband. It’s a clear passage. At the same time, you need to understand the context of this passage because it is worse than you might think. But when done in God’s way, there is protection, and fear is removed.