The Underworld, Hell.
~~~
The moment Lucifer entered inside the twins room, where he saw Marilyn with the two other maids that helped with getting the twin girls to sleep, she didn't need anyone to tell her that she was in trouble.
He never really comes here, to the children's room since after their birth leaving her with the heavy responsibilities that came with birthing demon kids seeing that all love their father had for them, vanished after seeing that they were girls instead son's.
But nevertheless, regardless of whatever he thinks of them, she's a mother, so she can't hate any child that comes out of their womb. But him being right here, right now in their room with that look on his face made her know that he wasn't here to check on the kids.
"Leave." Lucifer ordered in a really cold voice that made the maids jump where they stood, before giving the both of them the space they needed.