It would be impolite of him to argue with her over the appeal of dressing...dressing like that while she was going so out of her way to aid him. It would be much better discussed at another time, so he limited his disapproval to a dubious frown for those few moments before she shifted subjects.
"Ah! Yes, I suppose that would be wise." He nodded, gathering up his civility once more. "This way, then?"