I loved this. This line especially:

"I did that," he thinks, and it's hard to tell how that makes him feel with all his edges still charred and smoldering. He thinks it must be pride. He should be proud . Of Dean-- proud of his strength, of his loyalty, of his determination. If it's a sin to feel pride, then it's fitting, because Sam doesn't feel like he ever left Hell at all.

Gorgeous, really. I really liked the POV you chose for this one. I think it worked very well. Thank you!