This work could have adult content. If you proceed you have agreed that you are willing to see such content.
This is set post-Ariel for sure and set in some undetermined time in the near future after the episode (and AU after that)
Simon unwittingly altered things for River when sneaking her into the Alliance hospital for the tests. Now, back on Serenity after a spell of not feeling well, River's just completed a test of a very different kind and for once isn't too sure what the results mean.