She was taking it really personally, and he felt bad about it. While she was changing, he turned the nice teacup on the saucer, enjoying the soft waves of motherly affection that came off of it, and tried to think of something appropriate to say that would make her feel better without making him sound like a freak. Nothing was coming to mind.
He was trying to decide if the skirt was better than the nightgown, and decided that seeing the occasional flash of white calf was just fine, thanks very much, when she spoke. He looked utterly surprised. "There's nothing wrong with you!"