Cassian meets her smile with one of his own and decides it's quite nice to share that sort of moment with her. "At the rate and sheer number of burps after the fact, I wouldn't be surprised if she was overindulging. She certainly has more energy than everyone I know." Themselves included.

He does raise an eyebrow at her too. Not in a judging or lecturing way. Just to show her he's noticed the lack of eating on her end. "You're not giving her much to compete with."