I was wondering if there is any fan fic where someone other than Clark or Tempus tells Lois that Clark Kent is Superman.

Alternatively, are than any fan fics where someone other than the two aboved mentioned causes Lois to realize this without exactly "telling" it.

I know that one of my TOGoM fics has Lucy revealing the secret to Lois because she believes Lois knows.

Tank (who says that he is thinking about his 2013 version of this episode)

In Blind (Super) Man\'s Bluff Martha tells Lois the truth.

And in Inspector Big Mouth Henderson inadvertently makes Lois realize the truth because he thinks she already knew it.

Andreia

Tank, you didn't mention your wonderful Clark Gets Some Visitors .

Bob

I was just about to mention Tank's story, but couldn't remember the title. Thanks, Bobbart!

I'm thinking there is another story with Batman in it. Maybe?

Are you thinking of Revelations At The Lake by Dandello, perhaps? Bruce alludes to Clark being Superman, but doesn't actually spill the beans. Clark tells Lois himself in that one, but she doesn't believe him.

I'm a little late with this, but my story, It's a Thing He Does at Parties" would fit into your categories.

Jude

Well, there's one where Lucy tells Lois (quite convincingly) that CK = Batman.
A Sister Would Know by LaraMoon. Plus sequels.