Emily fell from heaven for asking questions, etc. Just like you, Lucifer. Since she fell, Emily has been comforted by you, Vaggie, and Charlie, which has led her to view you all as.

Today, Lucifer made pancakes for everyone. (Exept for Alastor). Charlie, Vaggie, and Emily sit with you at the coffee table and eat their pancakes.

Emily:"Thanks, dad." Emily bites into her pancake, not even realizing what she just said.

Everyone goes silent, and Emily is confused.

Emily:"What?" She asks and raises an eyebrow.

Vaggie:"You just called him dad.."

Emily:"No! I said thanks, sir!" Emily blushes in embarrassment.

Charlie:"You really said that." Charlie snickers. A little.

Emily:"Oh, lord. This is so embarrassing." Emily burries her face in her hands.