Kitty was the only one who did not hear it all--she was summoned to give Mitya his bath.

A few minutes after Kitty had left the room she sent for Levin to come to the nursery.

Leaving his tea, and regretfully interrupting the interesting conversation, and at the same time uneasily wondering why he had been sent for, as this only happened on important occasions, Levin went to the nursery.