This is a Harley x Female reader, I don't see many so I decided to write one.
You were jealous of Mr. J's relationship with Harley. She was the star in his eyes, you were only a second serve. Harley was thrown into prison leaving you with Mr. J, you had your time with him until you too were arrested.
Being in the same prison cell with Harley was.... Difficult to say the least but you got to know the psycho just a bit better. You develop feelings for her feelings you had only felt for The Joker.
Cover by: void_winchester.
Also the sequel is up so go check that out.
(I won't be editing it since I feel like it shows how I've improved through each chapter, just be warned)