Heeheehee, I saw that episode when she got upset with his breathing. I think they're really great for each other. Both balance the other out. I do think it's great when she smacks him. He probably likes it.
Did anyone see the episode where they go to the zoo, and see the penguins? And, Kate starts talking about how the one penguin probably thought the kids were also penguins, and Jon just starts rolling his eyes. I love it!