Hey, 

I am looking for a sam and dean fan-fiction, here's all I can remember: 

Sam is the king of hell and dean is sort of his consort in training. Sam is usually cruel, lucifer/crowley type of typical ruler of hell, but he still "cares" deeply for dean. He wore a pin that changed colors to better communicate with dean about when his mood was changing (it ranged from yellow-happy to black-livid, there was even a color for lust and sadness). dean used the pin to determine when he should stop pushing. There are a couple other brief scenes I remember: dean is chained to sam's desk while sam works (sam gave him a movie and he watched Aladdin — a movie he used to watch with sam as a kid), dean pushed too far and sam left to kill a lot of people and came back calm, dean realizes that sam isn't manipulating him into enjoying making love with sam and that freaks him out, sam has a plan that once he gets dean on board with being his consort he's gonna get dean on board with being his second in command (killing/torturing people for him). 

Thank you so much!