Daughters. As in multiple. As in he adopted multiple daughters-
I know a lotta people want a war but like... I dunno. Lucifer doesn't seem like the type. He's too tired to deal with Heaven, and I think he just wants to be left alone. He doesn't want to be the monster Heaven makes him out to be either. He meant it when he said he was going to talk to Sera. Lucifer is only here now to end the deal, and try to get some justice for Emily. Only one of those is accomplished...