I'm no biblical scholar... but I recognize exaggeration and cover-up when I see it.
The story of Lot in Genesis (wikipedia) is about the nephew of Abraham. Because of quarrels between Abraham's and Lot's shepards, Lot moves his family and business to Zoar (which is soon destroyed along Sodom & Gomorrah and two other cities). Lot persuades angels to spend the night in his house instead of on the street... and when the depraved of the town came to his door to 'meet' (original word sometimes translates as 'rape' apparent) the angels... Lot offers them his daughters instead. The townsfolk weren't interested. Hmm. In thanks, the angels warn Lot the city would be destroyed, and they should flee and not look back. He flees with his two daughters and wife. The wife looks back, turns to pillar of salt. Later his daughters get their father drunk, sleep with him and get pregnant, giving birth to sons. Sons that later become patriarchs of the nations of Moab and Ammon.
How about this interpretation:
Lot moves into a new town and sets up business pimping out attractive young men and women. Not content with that, he and his hustlers engaged in theft and other illicit activities. Conflict and trouble with the authorities soon follows. Lot's crew sets fire the town and escapes during the chaos. There likely was no wife to turn into a pillar of salt. Lot retires in the mountains with two of his prostitutes. The greedy young hustlers decide to move on to another city, where the cycle of theft and arson continues until they're caught or disband.
And that bit about Lot's daughters' incest fathering the patriarchs of Moab and Ammon? Just mudslinging against neighbor nations.