Disclaimer: Pride and Prejudice was written by Jane Austen, and as such, she owns the characters and other such things. I own nothing, -nothing.-
Author's Note: This is just make take on what Caroline Bingley must have thought when she heard that her brother was going to marry Jane Bennet.
She had yet to shake off her shock at the sheer horror of it all.
Caroline Bingley had always considered her brother a man of good taste, if perhaps not good sense, but the very fact that he was going to marry Jane Bennet appalled her. Jane, while a gentleman's daughter, was a young woman from at country estate who had much less taste in fashion that Caroline herself. While Caroline had appeared to befriend Miss Bennet while they'd been in the country, it had been merely to relieve her boredom and pass the time. She could not spend all the day talking with her sister, and some of Jane's views had amused her for a time.
Once they'd gotten back to the proper setting of London though, Caroline had lost interest in Jane. Miss Bennet was a country acquaintance whose company meant very little in the wonderful setting of the city. Caroline had thought never to see her again, and so, in truth, had attempted to put Jane Bennet out of her mind completely.
And her brother was to marry this woman? Caroline worried about what slights Jane might remember, like the fact that Caroline had visited her only shortly during Jane's stay in London and then had cut off all contact with her once Jane's younger sister had run off and made a disgrace of the entire Bennet family.
Now she would have to associate with Jane whenever she saw her brother.
Caroline knew that she must appear the loving sister, if only to gain Jane's good favor. She would pretend as if the slights she'd given Jane had never taken place. If she could gain Jane's favor, perhaps she might persuade Jane to talk to the future Mrs. Darcy about letting her visit Pemberley.
Yes, this was undoubtedly the best course of action. Once she secured Jane's good favor, she would be able to rest easy once more.