Lol, of course the Bible is always OK, but you can find much worse.

    And they made their father drink wine that night: and the firstborn went in, and lay with her father; and he perceived not when she lay down, nor when she arose. And it came to pass on the morrow, that the firstborn said unto the younger, Behold, I lay yesternight with my father: let us make him drink wine this night also; and go thou in, and lie with him, that we may preserve seed of our father. And they made their father drink wine that night also: and the younger arose, and lay with him; and he perceived not when she lay down, nor when she arose. Thus were both the daughters of Lot with child by their father. –  Genesis 19:33–36.

    And when she had brought them unto him to eat, he took hold of her, and said unto her, Come lie with me, my sister. And she answered him, Nay, my brother, do not force me; for no such thing ought to be done in Israel: do not thou this folly. And I, whither shall I cause my shame to go? and as for thee, thou shalt be as one of the fools in Israel. Now therefore, I pray thee, speak unto the king; for he will not withhold me from thee. Howbeit he would not hearken unto her voice: but, being stronger than she, forced her, and lay with her. –  2 Samuel 13:11–14

    Their children also shall be dashed to pieces before their eyes; their houses shall be spoiled, and their wives ravished.  - Isaiah 13:16.

    And when her sister Aholibah saw this, she was more corrupt in her inordinate love than she, and in her whoredoms more than her sister in her whoredoms. She doted upon the Assyrians her neighbours, captains and rulers clothed most gorgeously, horsemen riding upon horses, all of them desirable young men. Then I saw that she was defiled, that they took both one way, And that she increased her whoredoms: for when she saw men pourtrayed upon the wall, the images of the Chaldeans pourtrayed with vermilion, Girded with girdles upon their loins, exceeding in dyed attire upon their heads, all of them princes to look to, after the manner of the Babylonians of Chaldea, the land of their nativity: And as soon as she saw them with her eyes, she doted upon them, and sent messengers unto them into Chaldea. And the Babylonians came to her into the bed of love, and they defiled her with their whoredom, and she was polluted with them, and her mind was alienated from them. So she discovered her whoredoms, and discovered her nakedness: then my mind was alienated from her, like as my mind was alienated from her sister. Yet she multiplied her whoredoms, in calling to remembrance the days of her youth, wherein she had played the harlot in the land of Egypt. For she doted upon their paramours, whose flesh is as the flesh of asses, and whose issue is like the issue of horses. Thus thou calledst to remembrance the lewdness of thy youth, in bruising thy teats by the Egyptians for the paps of thy youth. - Ezekiel 23:11-21

    But all the women children, that have not known a man by lying with him, keep alive for yourselves. – Numbers 31:18

Deuteronomy 22:28–29.

“If a man meets a virgin who is not betrothed, and seizes her and lies with her, and they are found, then the man who lay with her shall give to the father of the young woman fifty shekels of silver, and she shall be his wife because he has violated her. He may not divorce her all his days.”

Rapin' is ok if she doesn't belong to someone else (theft) and you have $50. Also HIS penalty is that HE has to marry HER.

So for LOT. Is it ok if the daughters initiate it? What is the lessen here? Is it trying to make some point about, better to keep the family going if there aren't any other men around?