Ideas? How about a steampunk AU where Emily is a bored noblewoman who uses her airship and her Letter of Marque to the fullest for fun and profit. Enter Emma, an imperious agent of Her Majesty's government ostensibly sent to inspect the ship and her captain. Secretly, however, Emma's actual mission is to entice Emily into volunteering for Her Majesty's Air Army - conscripting a noblewoman would be a political nightmare, but Emily is so damn good that she's making the actual fleet look incompetent. Adventure, angst, and romance (or at least raunchy sex) ensue.