When Karenin returns from talking to Betsy, Anna has been crying. He tells her that he is grateful that she has decided not to receive Vronsky. Anna learns about the business with the wet nurse, and she is indignant that she is not allowed to nurse the baby. She begins lashing out, and Karenin feels powerless in the face of her erratic emotions.
Anna lashes out against Karenin, but her frustrations are actually directed against herself: she is upset that she hasn’t bonded with her child, and she needs someone to blame, so she takes out her anger on Karenin.