Miss Jane Bennet was firm when she knew she was in the right. Mr Bingley loved her, she loved him, Caroline was a dear friend and her sister Elizabeth was so in love with her own opinions that she lost sight of what was very clear to everyone else: Mr. Darcy greatly admired Miss Elizabeth Bennet.
Having snooped around her father's bookroom and having found some greasy piece of correspondence from Kent, Miss Bennet could see the writing on the wall. Together with the man who held her heart, she made a cunning plan. Using her own mother's machinations to her best advantage, she allowed herself to get wet on the way to Netherfield in order to pretend to fall ill.
Her devoted sister, entirely predictably, joined her as soon as she could. A few coins changed hands from Mr. Bingley to Mr. Jones, and Miss Bennet was guaranteed to stay at least a week at Netherfield house.
While Mr. Bingley made sure his best friend imbibed enough spirits to guarantee to keep him in bed a good while longer than usual the next day, Miss Bennet made sure to slip some laudanum into her sister's tea.
That night, the pair took drastic steps, all in the service of their dearest friends' future felicity, of course. Mr. Darcy was brought to a room that looked much like his own, undressed and put to bed by his best friend. That this bed already contained the one vision he dreamt of every night, did not alarm the great man. A nude Elizabeth pleased him greatly and would guarantee heated dreams of the best kind.
It wasn't until late the next morning, when his valet and his best friend woke him, that Mr. Darcy would realise this was not a dream, but instead a great compromise.