He actually laughed at what Padmé told him about her younger self. "I called him that as well. Twice, I think. Perhaps three times. And every time I bowed to him, I thought he was going to squirm out of his skin." Not that Anakin's reaction had anything to do with why Obi-Wan had continued to bow to the older Jedi, of course.
Obi-Wan waited for her to sit down before going back to his original seat. He nodded when she mentioned the wedding; he hadn't known they were actively working on it, but they'd been together before everything had fallen into the Sith Hells back home and so it was not a surprise this time round. He didn't know if he was supposed to say anything, though, so he stayed quiet for the time being.