Of all the things to expect, a kiss was definitely not one of them. And Obi-Wan was taken completely offguard. Not as prepared as one might think, was he? Well, it was just so unpredictable! How was he to know that she was going to do something like that? He hadn't gotten any such impression. A kiss, indeed! Why--
-- that was something he hadn't experienced in a long time.
When she let go of his robes, he caught himself from falling backward too many steps. Then he just looked at her with an expression that clearly revolved around the question: Huh?
He was definitely not being caught at his best here.
He blinked a few times and watched her. Perhaps it was just a custom in the place she was from? Far be it for him to be upset over tradition. Not that he was upset anyway. It was just a kiss, after all. Nothing so extraordinary.
Once he composed himself he motioned to his chest then his head and then to her. Trying to convey that he thought she was behind this quiescence.