During The Intermission: Enjoying Being Swindled

In this variation, Elizabeth refuses Wiilliam's proposal. When she gets home, her Mother finds out what has happened, and urges Elizabeth to get in touch with William to rescind her refusal. Elizabeth will not, because she still regards him as a proud, pompous idiot.
Mother thinks out another plan, Elizabeth agrees with it, and they pretend that George Wickham has seduced Lydia and brought her to live with him in the London Slums. She allows William to think that he can intervene, produce the money to have the affair hushed up. Then the Bennett woman leave, after Elizabeth reveals the fraud to William. He is devastated.
Nature works it all out, there is another woman that sees what has happened, and decides to intervene herself.
A short story, names changed to save typing, no filler.