I'm a little confused about Martha. Some reviewers noted that she is aware that Clark is a Soviet spy, but I'm not sure. They never have any kind of expository exchange around who exactly he is.

In last night's scene, I thought she was being metaphorical and grasping at straws. Creating an alternate storyline to explain away her emotions around the fact she's definitely aware that "Clark" has an entirely different life outside her, and he won't abandon it for her.