Not Human Anymore

Chloe Decker is Chloe Morningstar, Queen of Hell, now, and it's a lot to take in. Chloe is adjusting to her new existence and trying to convince her husband, Lucifer Morningstar, that she's happy in Hell with him and with their work. But not everyone is happy that a "human" has become the Queen of Hell, and one demon is determined to make sure Chloe doesn't stay on her throne, so he enlists the help of a former foe to keep Chloe from Lucifer. Takes place in the Family/Therapy universe just after Cain and Abel's therapy session in "A Little Murderous Family Therapy." (You don't need to read it to understand this story, but if you'd like to read it, it's part of the Family/Therapy series. https://archiveofourown.org/series/2588488)