Ahhh...Chi of Steel. My favorite!
You know, one day, I'm going to write a CoS episode extension, just as soon as I figure out a way to redeem it. (I managed to do it for Smart Kids!)
So you’d think that she’d be the one that was most likely to find out my secret.
Well, sure, that's the fun (and frustration) of that part of the series. It is, after all, galactically obvious.
One question:
I never really believed that Clark was trying to fool her, or intentionally deceive her. I think he's rather passive about his secret around her - he's waiting for her to figure it out. If she discovers it on her own, he won't deny it, but until then, he won't proactively tell her either. How Lois might perceive this distinction, though, is another question altogether.