Having said this he glanced at Natasha.

She turned away from him and glanced at her younger brother, who was screwing up his eyes and shaking with suppressed laughter, and unable to control herself any longer, she jumped up and rushed from the room as fast as her nimble little feet would carry her.

Boris did not laugh.

"You were meaning to go out, weren't you, Mamma? Do you want the carriage?" he asked his mother with a smile.

"Yes, yes, go and tell them to get it ready," she answered, returning his smile.