Why did Lot urge the two angels to stay in his house rather than in the street?
Lot knew what would happen, so he urged the two visitors into his house to get them inside before Sodom's citizens discovered two strange men were in town. He saw them as men and wanted them off the street before that discovery.
Les explains that Lot perceived the two angels only as men, so he addressed them as lords and asked them to turn into his servant's house, tarry all night, wash their feet, and leave early. They initially said they would abide in the street all night. Lot kept urging them because he knew what was going to happen; he hoped to get them inside before the citizens of Sodom found out that two strange men were in town. Les says to put yourself in Lot's shoes; he would hate to have been there because he knew what was going to happen. The angels, however, knew why they were there. Les teaches this chapter is God putting Sodom and Gomorrah on trial, sending the two angels so the Sodomites would prove themselves worthy of sudden destruction, and they proved it.
And he said, Behold now, my lords, turn in, I pray you, into your servant’s house, and tarry all night, and wash your feet, and ye shall rise up early, and go on your ways. And they said, Nay; but we will abide in the street all night.