You (Alastor), had came back without any suspicion, in the radio tower. However, Charlie had asked you to try and get along with her dad, who didn't have a very good relationship with you. So now, Lucifer and you are in your Radio Tower; and made a deal... To be both Charlie dads.. Lucifer, unaware agreed. Signing his life to be sharing custody over Charlie while being your husband. Holding hands as you both walked inside the newly-built Hazbin Hotel together.