This is a rec with a caveat. I originally passed over this story because a, BSDM isn’t my thing, and b, I had not read the series which the story notes say this is an “unauthorized homage” of. I read it because of Cathexys’s (locked) post in which she referred to the story as a feminist critique; this is how I read and interpreted the story, and that’s why I liked it.
I guess I’d describe this as a “BSDM AU”. For discussion that includes the BSDM aspect and the relationship between this story and its source, see Millefiori’s post here; to me, it reads as brilliant social satire on traditional views of the role of women:
Until 1941, subs hadn’t been allowed in the military at all; temperamentally unsuited, everyone said, for fighting. Much better to keep them safe at home. Subs were excellent aids and secretaries, junior engineers, kindergarten teachers, nurses, assembly-line workers, mechanics, accountants—careful, rule-following, meticulous, obedient. In the midst of World War II, personnel shortages had forced the armed forces to allow subs to enlist, but they’d been put in separate units, and couldn’t be promoted beyond Corporal. Subs had separate rank insignias until 1970 and wore an S-pin on their collars until 1982.
I’m not generally a fan of BSDM, but here I don’t think it’s intended to be either particularly realistic or even titillating, so for me it works more as a metaphor, the absurdity of which is what makes the satire work. Helen also pokes fun at some canon and fanon elements (such as Sheppard’s frequent defiance of orders). The characterizations are fairly loose, as usual with her stories. The writing is beautifully invisible and just pulls the reader along.