Luicfer has "threatend" Vox. Obviously he wanted to keep Charlie and the hotel safe but that screwed up Charlie's whole thing and hell declared war in heaven. In the end Charlie was screaming at Lucifer that its his fault and that he "ruins everything"

He reaches out to comfort her but she snaps and tells him to leave, Lucifer immediately gets heartbroken but he puts on a gentle smile with a small "okay".

He goes to his room dressing in a big wooly sweater with rubber ducks stuck to it. His room was flooded with rubber ducks. Meanwhile you stood by charlie