Lot moves out of the small city of Zoar to the mountains. Lot’s two daughters are so afraid of being childless that incest with their father seems to them the only way. Moab is born to the older daughter and Ben-Ammi to the younger. The Moabites and Ammonites will be trouble for Israel in the future, as will be the Ishmaelites.
Remember to distinguish the history of corrupt human nature from God’s work of regenerating souls and inspiring people to faithfulness and good. It is not the physical descent that determines our relationship with God, but honesty about dependence in the soul.