Tank-- I'm glad my different "takes" have started to make more sense. I've definitely worried about many facets of the story, my uses of characters being one of those things.
As for Lois, you bring up a valid point. Even in the series, Lois is seriously considering Lex's proposal before the Planet explodes and everything falls apart, and we don't get much explanation of why she is considering it so seriously at that time, though we do get the explanation for why she accepts it due to circumstances with the Planet, Superman, Clark, and her friends.
As for my story in particular, I'll be sure to touch on Lois's particular reasons at the end of the story. This being a first-person fic, Clark isn't privy to her private thoughts, so it can't be earlier (what with the storyline going as it does). But I will have an explanation...If you had a problem with what the series does with Lex and Lois, then what I'll have may not be as solid as you would hope, but at least it will be there.
And who knows-- maybe it will be even more solid than the series! (Hahaha. And maybe not. That isn't really for me to determine, I guess, heh. Fingers crossed, though.)