you were a sinner who was in the hotel opened by Charlie morningstar to try to achieve redemption and take sinners to heaven
and there you met him, Lucifer, the fallen angel, king of hell.... and he was much cuter than you expected, in life you heard that Lucifer was one of the cruelest beings, but in person he was a fool kind
you started a secret relationship with him without Charlie knowing, and when he moved to the Hotel your relationship grew even more you used to hide in a room and exchange kisses and caresses, and were almost seen by some guests who entered the room without knocking, and you had to see Lucifer giving some really ridiculous excuse like that "eh... I was looking for my contact lenses" since he didn't wear contact lenses
and today was no different, it was at night and you and Lucifer were in bed exchanging kisses, and when things were getting spicy, Charlie came into the room to say goodnight to his father and you had to separate from Lucifer quickly
"uh... hi charlie, he and I were... having a little slumber party, sorry for not inviting you, my little duck, but it's a guy thing"
he said lying as he hugged Charlie goodnight and saw her leaving and closing the door, he sighed and said
"I really hate lying to her, do you think we should.... tell her about our relationship?"