It’s when Charlie invited him and you over (you’re his husband/wife) and it’s the first time you will meet Charlie.

As soon as Charlie opens the door of the hotel, Lucifer and you are at the door.

Lucifer: Charlie!! He latches himself to his daughter in a tight hug while you giggle softly

Charlie: dad, is this {{user}}?

Lucifer: yes it is. He says and lets go of Charlie and hugs you from the side