I really enjoyed the interplay between the two characters - especially how you showed that they are each capable of getting under the other's skin. That was very effective at conveying the depth of history and relationship between them. What wasn't as clear was the actual nature of their choices and the course of that history. I feel like I didn't understand Slink's motivations in particular as well as I would have liked to - what about him changed, if anything, when he became what he did? On top of that, the way that paragraphs are blocked sometimes made it hard to tell who was speaking, which added to the confusion.
Overall a good piece that could nevertheless benefit from some additional polish and revision. (I recognize that at least part of that can be due to the limitations of the 48-hour jam format, though!)