Elizabeth was disgusted, and even Miss Bennet was shocked. Lydia was Lydia still – untamed, unabashed, wild, noisy, and fearless. She turned from sister to sister, demanding their congratulations; and when at length they all sat down, looked eagerly round the room, took notice of some little alteration in it, and observed, with a laugh, that it was a great while since she had been there.

– Jane Austen

Pride and Prejudice, Chapter 51. Arriving back to Longbourn after her marriage to Wickham, Lydia still has the capacity to shock Elizabeth and Jane with her behavior. They view her as wild and untamed and completely unabashed by what she had done – run off with Wickham, unmarried.