Lot and his two remaining daughters escaped to Zoar, located in the higher elevation out of the plain (today known as the Jordan valley). They found refuge in a cave. The husbands of all Lot's OTHER daughters (the number of Lot's sons-in-law is not given) had refused to leave, therefore they and the daughters perished in the overthrow of Sodom. Genesis 19:31-38 records these two virgin daughters who escaped with Lot were concerned about having no children. In fact from their logic in Genesis 19:31, it almost looks like they had presumed that the destruction of Sodom and Gomorrah was a world-wide destruction and that there were no more men on the earth. So on each successive night, they served their father (Lot) wine until he was drunk, and then they took turns laying with their father in order to conceive and bear a child. The firstborn daughter bore a son and named him Moab, who became the father of that nation. The second daughter bore a son and named him Ben-Ammi, who became the father of the Ammonites (mostly the nation of Jordan). __________________________________ >> Glenn Blaylock: The two daughter that survived were unmarried. (Genesis 19:8) Glenn you are absolutely right, and I didn't notice that. It seems Lot had many daughters, and all of the married daughters remained (how many is unknown) with his sons-in-law (Genesis 19:4). I have modified my answer accordingly. Thank you very much. Great catch!

The 2 surviving daughters had sex with their drunken father as they thought they were the last people on Earth.

They got daddy drunk, and date raped him. And never got punished for it. Hmmmm.....