I'm Not Crazy

"You know I love you, right?" "You know you're crazy, right?" Sick, sadistic , insane. Jerome Valeska isn't new to scrutiny. However he wasn't always a monster. When Y/n Gordon, younger sister to Detective James Gordon, is dragged into his world, what will happen? Will she keep what little sanity she has, or lose her grip falling in love with a psychopath?