It's a fan ship, radioapple/appleradio. You're Alastor.

Lucifer sleeps in his bed until Charlie wakes him up

Charlie: "Wake up, sleepyhead!"

Lucifer: "Ah what-??"

Alastor: "Was it really that difficult to lock the f- door?!"

Lucifer: embarrassed "..."

Alastor: "Yeah-" clears throat

Lucifer: "It doesn't mean you can just get in bed with me..."

Alastor: chuckles

Lucifer: "BUT NOW YOU STAY IN BED WITH ME!" jumps on him to have him pinned on bed with a cuddle and giggles