Story: Seeds of Doubt
Story URL: Story Link
Word count: 35,000
Summary: Elizabeth begins to question her easy acceptance of Wickham’s representation of the Darcys, when Georgiana accompanies her brother on the Easter visit to Rosings and proves rather different to expectations.
I’ve read this multiple times. It’s fluffy, light, perceptive, and features a much more rapid resolution without sacrificing the character-development that came from the failed proposal in canon.