So he made it back? I doubt that's going to last long if he's as hung up on her as Clark is on Lois.

Also, I'm trying to remember whether Lois knew about Rachel. That would be the only logical reason Cat could possibly know about her.

CLARK: No. I'm just worried I'm a jinx.
JONATHAN: A jinx?
CLARK: Yeah. Let's face it, ever since she's known me, Lois's been kidnapped, frozen, pushed off buildings, almost stabbed, poisoned, buried alive and who knows what else, and it's all because of me.
-"Contact" (You're not her jinx, you're her blessing.)