...because I recalled having seen the P&P3 adaptation before even opening the novel for the first time. The director, Joe Wright, contrives to show Jane growing progressively distant from Lizzy---they sleep in the same bed, but each one's back is turned away from the other; they have stopped confiding in one another. So I got the impression that Jane's hurt over Bingley had begun to come between the sisters. I didn't see this happening either in reading the printed page or in later viewing the P&P2 adaptation.

I feel the truth is found more closely in your characterization of Jane's unsuspicious nature.