I know that we love our B-Plot / Romance driven fics on this site. Are there many long A-Plot driven FanFics (15+ parts) in which Lois still doesn't know or have any clue at the end that CK=SM? (Or has super powers or came from another planet... no cheating by pointing out fics where she's the alien, or Clark never becomes a hero, etc.)
The only one which jumps to mind is Nan's excellent Vampire Murders (WIP, so who knows? Well, besides Nan.)
Thanks.