In fact, Lot apparently became a man of some importance in the community, because Genesis 19:1 says "Lot was sitting in the gate of Sodom"—which tells us that he ultimately became a kind of civic official there. To have a claim on that place, you had to be someone of importance, recognized by everyone in the city.
As much as he may have enjoyed the comforts of city life, he never felt at home in Sodom. Peter tells us Lot's righteous soul was vexed every day by the wickedness of that city's rampant perversions (2 Peter 2:7-8). No matter how settled Lot became in Sodom, his heart was never at home in that city. He never came to love the debauchery and evil indulgences that characterized that place.
Mrs. Lot was different. She was attached to Sodom. If that city was not her home when Lot married her, it became her home in every sense. She grew to love to the place. No matter how evil it was, she did not want to leave. She probably loved being the wife of a prominent person in such a sophisticated, morally liberated city. There is no suggestion that her soul was vexed by the wickedness there.
First John 2:15 says, "Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him." That was precisely the thing that caused Mrs. Lot's downfall. She loved Sodom.
Why did she love that evil place so much? Because the love of the Father was not in her. Her values were worldly values. The things she loved were worldly things. She was a friend of the world, and therefore she was an enemy of God. And when faced with the necessity of fleeing a world that was perishing, with the way of divine deliverance open before her, she could not tear herself away from what she really loved.
Here is the danger of such a wayward love: First John 2 goes on to say, "For all that is in the world—the desires of the flesh and the desires of the eyes and pride in possessions—is not from the Father but is from the world. And the world is passing away along with its desires, but whoever does the will of God abides forever."
You can think about it like this: you will spend eternity with whatever you truly love the most. If your heart is fixed on the things of the Lord; if you love righteousness; if you find your sweetest joy in fellowship with Him, that's where you will be throughout eternity. But if your affections are set on the things of this world, if what really delights you the most is the things that are passing away—if your life is characterized by the lust of the eyes, the lust of the flesh, and the boastful pride of life—then like Lot's wife you will perish in the destruction of all that you truly love.