Wow. Finally, Lois and Superman talk. And it revealed just as much as it left hidden.
I'm pretty sure this IS the real Clark. He was concerned once she started talking about Clark, especially when she mentioned his mother. He's afraid she knows the Clark=Superman.
Also, he stopped her from saying things that he couldn't reply to without causing problems ... Lois looked for listening devices, but the one place she didn't look ... Superman himself. What if he's the one being tracked, being tagged. This is why 'Clark' has never shown up.
Still, why was 'Superman' also missing for all those years? What were they doing to him in the mean time?
Hope they get to talk soon. Hope there is romance and kisses somewhere in the future.
