Numbers 31:12-18 - Just or unjust?

Numbers 31:12-18

It is very easy to desire "a beautiful woman", and to take her for a wife, especially if she appears agreeable.

Unfortunately, it is also very easy to take advantage of such a woman, especially if she is a foreigners who has no protection under the law.

We need to know what the man s intentions are and / or prevent any abuse on his part.

1. "shave her head, and pare her nails" (v 12) - there goes her beauty.

2. "shall remain in thine house, and bewail her father and her mother a full month" (v 13) - there goes the agree-ability.

Now the man s motives can be made manifest, and he can not "go unto her" until he is ready to take her for wife.

But if the man does not want her, she is free to go, being humbled (v 12), she is still free to marry.

Is this just or unjust?