How does Lydias disappearance with Mr Wickham affect Elizabeth in Chapter 46?

This shocking piece of news is not only horrible in and of itself, but also because Elizabeth understands the repercussions for herself, and the irony of the situation. Just as she is beginning to have feelings for Mr. Darcy, all is lost, thanks to Lydia's immoral behavior. In this era, a woman that has eloped with a man who is considered an imprudent match is frowned upon, but it is nothing compared to a woman who runs off with a man and does not marry him. This is the ultimate shame, and makes her immediately ineligible for marriage in the future.