Calliope is certainly plenty distracted, admiring all the dials and levers while listening to Iman's enthusiastic questions. Personally, she would think that this place being a 'pocket' dimension and also really very much existing within a smaller space aren't mutually exclusive the way Iman's wording makes it seem, but then this isn't her wondrous ship, and the Doctor probably enjoys explaining things, so she keeps her thoughts to herself.

That is, until the Doctor casually reveals something awfully familiar sounding. She immediately ceases her examination of the console to stare at him in astonishment and a smidgen of involuntary dread, barely refraining from cutting him off until he stops talking for a spell. "Do you mean to say that you are a Lord of Time?" she rushes out, because it's both very important and very intimidating. Realizing that she sounded more concerned than there is surely any reason to be, she hastens to add, "Only I, well, I would have expected fitting an infinite structure into a much smaller box to be the purview of those who bear the Space aspect. Not that there is anything wrong with being a Hero of Time! Nor with being a Lord, I suppose..." Except for how she can't think of anything nice to say about that class just now. Oh bugger, she shouldn't have said anything at all.