Oh my God. This is fantastic. I'm so glad I came back to read it. Your descriptions of Azkaban are so dark, vivid and imaginative. I could imagine the place clearly in my mind. The sex was hot and twisted, gripping, the relationship between the brothers more so.
And the ending. Wow. I didn't see it coming but it made perfect sense and felt very in character for a Death Eater.
Great fic. Definitely reccing this in hp_darkfic_recs today.