He knows better.

If he was to make so bold as say a word to me, I should slap his face.' Her own was as red as ever I saw it, or any other face, I think; but she only covered it again, for a few moments at a time, when she was taken with a violent fit of laughter; and after two or three of those attacks, went on with her dinner.
I remarked that my mother, though she smiled when Peggotty looked at her, became more serious and thoughtful.

I had seen at first that she was changed.

Her face was very pretty still, but it looked careworn, and too delicate; and her hand was so thin and white that it seemed to me to be almost transparent.

But the change to which I now refer was superadded to this: it was in her manner, which became anxious and fluttered.