He just looked at her, taking in her emoness and the fact that she'd already admitted she was joking. There would be no point in retracting that now...
"Oh. Oh. OH."
Finally, he got it. His hand stopped moving on her back as he drifted off into thought. Did he want a kid? Not particularly. Did he have a choice? Not really. But he didn't HATE the idea, and it was already done so it wasn't like he could take it back anyway. The back washing started back up and he just smiled lightly at the back of her head.