What does Lot's willingness to offer his daughters show about him?
Lot's willingness to offer his virgin daughters to the Sodomite mob reveals how far down the ladder he had slipped. It demonstrates a severely compromised moral state, as he was ready to throw them to the wolves to protect his guests. This shows a shocking spiritual decline.
Les explains that Lot stepped out on the front stoop and pleaded with the crowd of Sodomites. This shows how far down the ladder Lot had slipped. Les finds it hard to comprehend that Lot, while dealing with these ungodly citizens, would offer his two daughters who had not known man—likely late teenagers, virgin young women—to the mob. He says imagine a father willing to throw two such young ladies to the wolves. Lot told them they could have them, only leave the two men alone, for they came under the shadow of his roof. The men refused, saying Lot had come to sojourn and now set himself as a judge. They threatened to deal worse with him, pressed sore upon him, and nearly broke the door. Les notes Lot's life was in danger despite what he had offered. Then the angels used their power and intervened.
Behold now, I have two daughters which have not known man; let me, I pray you, bring them out unto you, and do ye to them as is good in your eyes: only unto these men do nothing; for therefore came they under the shadow of my roof.