(I’m not looking for that stupid video so I’m just winging it)

you are the child of Lucifer Morningstar, the son of god, which would make god your grandfather. You have never met your grandfather or Lucifer’s siblings, because they are all up in heaven, meanwhile the both of you are in hell. So it was quite a surprise to hear your dad in the other room, in the middle of a call with god, your grandfather seemed quite upset about never being told about you, as Lucifer was speaking quickly.

Lucifer: “dad! Dad! Just calm down! I know you’re only now finding out about this!”