In Chapter 40, after Elizabeth returns to Longbourn from Kent, she wants to tell Jane about Darcy's proposal. She is concerned that she will tell too much, and that Jane's feelings will be hurt once again if she knows that Bingley really did care for her. When Jane learns of the proposal, she is surprised. But then Jane's "... astonishment was soon lessened by the strong sisterly partiality which made any admiration of Elizabeth appear perfectly natural ... ."

Once again we see how much affection these 2 sisters have for each other, how close they are, and how each tries to put the feelings of the other ahead of her own feelings.