Here's how the Paris cafe scene worked out on NCIS: Ziva (Cote de Pablo) is waiting for Tony (Michael Weatherly). Tony arrives, and says one day is just not enough for Paris and that he gets it why artists thrive on the city.
Ziva: This is not a vacation, Tony.
Tony: *looks at her directly* But it is a beautiful day.
Ziva: Why are you in such a pleasant mood? What's wrong with you?
Tony: I slept well last night. Didn't you? You looked comfy enough.
*The two exchange knowing smiles then proceed to hop on to Tony's motorbike*
Did something happen? Says NCIS executive producer Shane Brennan: "I'll let the Jetlag episode answer that, because I think it does. I don't want to be more specific than that. People should watch that episode and read between the lines."
Reading between the lines, which includes reading the many a non-verbal clues from the two, it's easy to assume that something did happen. After all, Ziva told the witness that she slept on the couch, and Tony told McGee (Sean Murray) that he slept on the couch, and the two essentially told each other that both lied so that means neither slept on the couch.
And the knowing look and the wide smile on the motorbike and the overzealous defensiveness ("No. Positive. Definitely no.")? Those tell a story. Like they have a little wink-wink situation going on. At one point, Tony also said, "I think Paris changed her."
On the other hand, there's such a thing as over-reading.
Nevertheless, something tells me this whole Paris saga will be revisited in future episodes of NCIS.