I'm wondering how you square that with e.g. Isaac taking Rebekah in the account in Genesis 24:64-67? The families knew the situation, but I don't read of anything public(?) Same with Abraham taking Hagar... .The public part means that you are claiming her and taking ownership of her and not just using her. Publicly means that she is afforded the protection due her by your covering. She is granted your protection by virtue of her relationship as your wife. Other men will know that she is not available and that they will be committing adultery if they mess with her.