Pride and Prejudice Volume 3, Chapter 19
Jane and Elizabeth both marry their suitors. Elizabeth settles at Pemberley, and Jane and Bingley eventually move nearby because Mrs. Bennet was driving them crazy at Netherfield. Kitty is vastly improved by spending time in high society with her sensible sisters, and although Lydia often invites Kitty to come stay with her in the North, Mr. Bennet will never allow it. Mary remains at home and takes care of Mrs. Bennet
Wickham and Lydia remain largely the same, and after Elizabeth's marriage to Darcy, Lydia sends letters telling Elizabeth to ask Darcy for money if she would. Elizabeth does not ask Darcy to help Wickham out, but she does cut corners in her own budget and send them money when she can afford to. Darcy, although he can't allow Wickham in his home, does help advance his career for Elizabeth's sake. Lydia is even allowed to visit at Pemberley when her husband is out of town. Wickham and Lydia often stay so long at the Bingleys that Bingley himself is ready to throw them both out. Miss Bingley is mortified at Darcy's marriage, but she tries to make amends with Elizabeth and is still friends with Miss Darcy. Miss Darcy now lives year-round at Pemberley with her brother and sister-in-law to whom she grows close. Lady De Bourgh is furious with Darcy for marrying Elizabeth, but after a while and at Elizabeth's encouragement he forgives his aunt's behavior and they reconcile. "With the Gardiners, they were always on the most intimate terms. Darcy, as well as Elizabeth, really loved them; and they were both ever sensible of the warmest gratitude towards the persons who, by bringing her into Derbyshire, had been the means of uniting them." Volume 3, Chapter 19, pg. 268