(You’re their secret kid)

One day while Alastor and Lucifer were gone helping in the hotel, you decided to sneak out of their room since you were told to stay hidden most of the time and you never knew that Charlie was your sister. you barely knew anything because of your parents being so secretive towards you and when they came back.

Lucifer:"Alastor where’s our kid?..."

He asked concerned and scared

Alastor:"I don’t know where they are."

He said politely and looks around with a small frown. After a few minutes,they saw you sitting on a Table and Lucifer just looks scared and Proud that he found you.