I enjoyed this story as it was going. The demons creepy and dangerous enough that they would've fit in over at Pseudopod too, and the idea of dragging something kicking out of your own gut while it tears apart your insides is freaky.
When he pulled the demon out, it seemed like that was the main resolution, but then the story kept on going and it made me wonder if something else was coming. Then it didn't, and it honestly left me a little confused about whether I might have missed something.
In the outro Dave mentioned cancer, which hadn't occurred to me while I was listening (the action itself was interesting enough that I didn't spend a lot of effort searching for metaphors), but it totally makes sense. And the extended ending makes more sense too, if that's what they were going for. He has fought the cancer into remission, and his wife is worn down from the emotional nature of such an unending recurrent battle, and they just make do as best they can. He has won the battle, and they can live without it again for a while, but there will always be another battle and some day he will lose, but for now there is nothing to do but get the most out of each day as they can.
So, I think that my confusion over the ending keeping going really had more to do with me being a bit dense and not watching for metaphors, more than a flaw in the story.