Carbon, Pressure, Time (Firefly/Serenity)

Title: Carbon, Pressure, Time
Wordcount: ~4000
Fandom: Firefly
Pairing/characters: Simon, Mal, River. Mentions of canon pairings.
Rating: PG
Prompt: Prompt: 326. Firefly: Malcolm Reynolds. No one knows that Mal used to have woman parts, and no one needs to. But when he needs medical attention, Simon finds out, and he doesn't understand why it needs to be a secret. After all, everyone on the ship knows who's rutting whom.
Summary: Even when a job's going right, Mal can find himself some trouble. Simon wants to find out more, but River already knows. Set post-Serenity.
Author's Notes: Thanks to hotelmontana and st_aurafina for beta reading and much-appreciated reassurance. Written for lgbtfest.

( Carbon, Pressure, Time )