"It's none of your business."
"You don't deserve to know."
"The Winchesters will handle it."
Those were just a few of the responses Castiel had for him when he asked about you. Lucifer had been scrambling to get you out of the Apocalypse World for weeks, even agreeing to work with the Winchesters, Gabriel, and Rowena. And what did they give him in return? Nothing.
Sure, he'd wrecked their lives. Killed some of them. He was the Devil, but you were his child. The Winchesters could call him a liar all they wanted, he loved you. He hadn't gotten to see you once since your birth thanks to those stupid hunters. All he knew was bits and pieces. You were smart, your nephilim powers were growing, and you were a bit of a spitfire.
But Father above did he want to know all of you. Be there. Do more for you than Chuck ever did for him. Chuck had pawned him off to be raised by Michael, and imprisoned him for thousands of years after he rebelled. And Lucifer found himself terrified that he'd turn out just like his father.