John Wesley on Genesis 20:1

And Abraham sojourned in Gerar - We are not told upon what occasion he removed, whether terrified by the destruction of Sodom, or, as some of the Jewish writers say, because he was grieved at Lot's incest with his daughters, and the reproach which the Canaanites cast upon him for his kinsman's sake. The king of Gerar sent and took her - To his house, in order to the taking of her to his bed.