On opening the door, she perceived her sister and Bingley standing together over the hearth, as if engaged in earnest conversation; and had this led to no suspicion, the faces of both, as they hastily turned round and moved away from each other, would have told it all. Their situation was awkward enough; but hers she thought was still worse.

– Jane Austen

Pride and Prejudice, Chapter 55. Elizabeth describes walking in on her sister Jane and Charles Bingley at an intimate and awkward moment. While readers are provided with a front row seat to Mr. Collins’s and Mr. Darcy’s proposals, this is all we get of Mr. Bingley’. Elizabeth adds two and two together to intepret what she sees.