I said "spy" from the first meeting of her and Philip at the gym. And he had the same reaction! There are so many similar examples of the ways Elizabeth has honeypotted her targets -- most recently that totally, totally random movie theatre connection with the Nunn intern. "Wow, what a coincidence that two French film buffs would bump into each other at a French film?! I think we are connecting! How random!"
OH! And the Look she gave him in "The Summit," after she asked when he was coming to bed: "Soon." Go back and watch the look she gives him right before she turns off the light. It is very assessing, as he watches the Jennings' home.