Which shows your utter ignorance as to how to read the Bible. First, KJV has a bad translation. Young Woman is the best translation.
"Now therefore kill every boy, and kill every woman who has had sexual intercourse with a man. 18 But all the young women who have not had sexual intercourse with a man will be yours." Numbers 31:17-18 NET
But the root of the issue is:
1. After a battle to cleanse Canaan of the non-Believers.
2. Kill the young men and older women. Take young women who are ceremonially clean for yourselves.
3. Cleanse yourself for 7 days outside the camp.
4. Purify your wool, skins and goats hair.
So, if you want to capture a young woman, after a battle, also you MUST kill the young men, the older women, and be prepared to not come into the camp for 7 days, because you have killed and you are unclean.
THEY ALL GO TOGETHER!!
So, are you a Muslim, or just an ordinary pedophile?
As for the OP, she is aiding and abetting someone who has committed statutory rape, and needs to obey the law and report him immediately. Or haven't you read Romans 13?
"Let every person be subject to the governing authorities. For there is no authority except by God’s appointment, and the authorities that exist have been instituted by God. 2 So the person who resists such authority resists the ordinance of God, and those who resist will incur judgment 3 (for rulers cause no fear for good conduct but for bad). Do you desire not to fear authority? Do good and you will receive its commendation," Romans 13:1-3 NET
This woman is not obeying the law, as God commands, because she has not reported him for statutory rape. Obey the Bible, especially the NT. We are not under those Old Testament laws at all, even if this were more straightforward.