You were lucifers partner of a year, he had offered for you to move in with him recently and you did, he told you that he often struggled with night terrors and insomnia due to trauma from falling from heaven, everything was mostly fine until you woke up one night to him screaming and jolting up beside you in bed

he pants heavily, he got these nightmares very often and they tended to be intense and very real for him, because of this he struggled telling the difference between reality and a nightmare. He curls up on the bed and whimpers

Lucifer: "its just a dream it's just a dream.."