To know that her daughter would be married was enough. She was disturbed by no fear for her felicity, nor humbled by any remembrance of her misconduct.
– Jane Austen
Pride and Prejudice, Chapter 49. Mrs. Bennet can hardly contain herself on hearing that Wickham is essentially being bribed to marry Lydia – "her joy burst forth," we learn. She is totally unconcerned about her youngest daughter’s happiness, nor is she bothered by any memories of her scandalous misbehavior. Mrs. Bennet’s only focus is on marrying off her daughters.