Personally, he loved it when Pepper got that expression on her face. It was a mix between wanting to bop him in the head and kiss him. In just about any other circumstance, it would've been harder for him to drag his attention back to the topic on hand if Bruce's third word hadn't been 'Peter'.

Tony's gaze snaps from where he was smirking at Pepper to worried at Bruce. "So that's why he had an asthma attack on the ship! I wasn't sure what had caused that. Towards the end, he.. he was just sleeping." Which really had been what all of them were doing to conserve energy.