stylistic:tone, structural:summarization, information:filtering, information:extraction, structural:scholar_edition
Part 6

Dolly, her children, and her mother, the Princess Shcherbatskaya, spend the summer with Kostya and Kitty. The couple's life is simple and unaffected, although Kostya is uneasy at the "invasion" of so many Shcherbatskys. He becomes extremely jealous when one of the visitors, Veslovsky, flirts openly with the pregnant Kitty. Kostya tries to overcome his jealousy, and briefly succeeds during a hunt with Veslovsky and Oblonsky, but eventually succumbs to his feelings and asks Veslovsky to leave. Veslovsky immediately goes to stay with Anna and Vronsky at their nearby estate.

When Dolly visits Anna, she is struck by the difference between Kostya and Kitty's aristocratic-yet-simple home life and Vronsky's overtly luxurious and lavish country estate. She is also unable to keep pace with Anna's fashionable dresses or Vronsky's extravagant spending on a hospital he is building. In addition, all is not quite well with Anna and Vronsky. Dolly notices Anna's anxious behavior and her uncomfortable flirtations with Veslovsky. Vronsky makes an emotional request to Dolly, asking her to convince Anna to seek a divorce from Karenin so that the two might marry and live normally.

Anna has become intensely jealous of Vronsky and cannot bear when he leaves her, even for short excursions. When Vronsky leaves for several days of provincial elections, Anna becomes convinced that she must marry him to prevent him from leaving her. After Anna writes to Karenin again seeking a divorce, she and Vronsky leave the countryside for Moscow.