As a first-time reader of S&S, only having seen the available movie adaptations before now, I was surprised by several things in the last two chapters. Yet again, for me, showing JA's genius; the books are SO MUCH BETTER than the movies!

In chapter 49:

Lucy had meant to deceive, to go off with a flourish of malice against him in her message by Thomas...!

Edward couldn't believe Lucy was a nasty person, that till her last letter reached him, he had always believed her to be a well-disposed, good-hearted girl...!

Lucy was very clever: she lost nothing by continuing the engagement, for she has proved that it fettered neither her inclination nor her actions. I didn't know she had it in her!

Edward was a little dim: he thought there could be no danger spending time with Elinor at Norland, and there would be no injury to anyone because he was already engaged...!

Poor Nancy: Lucy borrowed all her money before she went off to be married, on purpose...stole it, more like!

In chapter 50:

Mrs. Ferrars DID consent to the marriage of Elinor and Edward... DID cough up a little money to add to their income... DID come to visit Elinor and Edward to inspect the happiness which she was almost ashamed of having authorised... and she forgave Robert and Lucy!

All of these were not in the movies, and were surprises to me! I'm so glad I finally read S&S!

In chapter 50, here are some VERY clever JA zingers(among SO MANY!):

Edward was being allowed once more to live...

Lucy became the favorite of Mrs. Ferrars by her gratitude for the unkindness she was treated with...