Panel 1: John asks Elly how she could possibly call him some sort of nutcase in front of her friends.
Panel 2: She asks him howcome he has to so serious. She was, after all, just joking.
Panel 3: He starts to say that that's different but, as she looks at him as if he's about to say just that, realizes that it isn't.
Panel 4: John mutters "You win" and saunters off.
Not, of course, that we'd want to any more than we'd want to see John stomp around like the injured party because he has to do things for his children. It rather disgusts me that Lynn thinks that he and the Delicate Genius are good fathers merely because they pay the bills but are otherwise surly, entitled non-factors in their children's lives. Sadly, it also doesn't surprise me.