I give Clark credit for stepping up and telling Lois that he loves her before he runs off. Plus he makes the promise that he'll explain everything that night. At least Lois knows there is an answer for her in the near future.
Lois, who is so in character, decides that Clark's profession of love and promise of an answer for his excuses isn't satisfied. She's going to investigate. Go Girl!
Susan, I personally don't think that
"She threw open the door and gestured as Vanna White would, a game show hostess offering the room's seclusion as if it were a prize."
will work because it takes the reader away from the story.
It's an interesting problem. Vanna White has become a popular culture icon over the last fifteen years (or more) in North America. She's the gorgeous blonde who does nothing but turn letters on the game board and show off prizes. Gave vacuous a new name.
But explaining the reference seems to take away the strength of the metaphor you're trying to make. At least I think so. Would I say the same thing if it was a UK or Aussie reference? I'm not sure. But I'd be curious to know who this Vanna White was.
Oh well, I think I've been no help whatsoever here.

Think I'll go read Nan's Circle of Fate
gerry