How we cite our quotes:
After tea he went out into the hall to order his horses to be put in, and, when he came back, he found Darya Alexandrovna greatly disturbed, with a troubled face, and tears in her eyes. While Levin had been outside, an incident had occurred which had utterly shattered all the happiness she had been feeling that day, and her pride in her children. Grisha and Tanya had been fighting over a ball. Darya Alexandrovna, hearing a scream in the nursery, ran in and saw a terrible sight. Tanya was pulling Grisha's hair, while he, with a face hideous with rage, was beating her with his fists wherever he could get at her. Something snapped in Darya Alexandrovna's heart when she saw this. It was as if darkness had swooped down upon her life; she felt that these children of hers, that she was so proud of, were not merely most ordinary, but positively bad, ill-bred children, with coarse, brutal propensities – wicked children.
She could not talk or think of anything else, and she could not speak to Levin of her misery.
Levin saw she was unhappy and tried to comfort her, saying that it showed nothing bad, that all children fight; but, even as he said it, he was thinking in his heart: "No, I won't be artificial and talk French with my children; but my children won't be like that. All one has to do is not spoil children, not to distort their nature, and they'll be delightful. No, my children won't be like that." (3.10.49-51)
Motherhood for Dolly has its ups and downs. Since her life is so focused on her family, she's horrified when her children misbehave. Levin, for his part, is convinced that his family will certainly not behave in that way. He seems to be under the impression that raising children is easy.
Levin had been married three months. He was happy, but not at all in the way he had expected to be. At every step he found his former dreams disappointed, and new, unexpected surprises of happiness. He was happy; but on entering upon family life he saw at every step that it was utterly different from what he had imagined. At every step he experienced what a man would experience who, after admiring the smooth, happy course of a little boat on a lake, should get himself into that little boat. He saw that it was not all sitting still, floating smoothly; that one had to think too, not for an instant to forget where one was floating; and that there was water under one, and that one must row; and that his unaccustomed hands would be sore; and that it was only to look at it that was easy; but that doing it, though very delightful, was very difficult. (5.14.1)
Levin finally experiences real family life and finds out that it's nothing like his fantasy. Marriage in itself is not the solution to his existential angst.