There's a fic I read a while ago, It's Jess still alive but the boys don't know that. From what I remember she ends up moving in with Jared Padalecki as his dog walker and Jared and Jensen are together. But Jess has body scarring from the fire and Jensen sees it and they kiss? That's about the most I remember. It was such an amazing fic and I'd love to re-read it.

found!