It was a prompt from one of the open-prompt posts ages ago, although I certainly had thought the pairing would be fun - if not a little cracky - before I wrote it. When the prompt was given I thought it would be funny if it was years after the finale, and Kyoshi Island was still giving the Fire Nation the finger for burning it down, and how by themselves - with sex - Zuko and Suki would make their own peace treaty =P. From there, it wrote itself.