I've redone a paragraph, so please let me know if it makes more sense now!
I went back to read the changes you made, and it is perfect (much better than my own poor excuse of a suggestion, which explains why you are the writer and I'm not!

)
It is now clear that Clark was exposed later in the evening, after Lois went to bed, and that she didn't see him.
This looks like it's going to be quite a ride! Looking forward to Part 2...
- Vicki