My favourite parts are Fanny's exaggerations, especially when she (somewhat) contradicts herself.

Early on she says, "why was he to ruin himself, and their poor little Harry, by giving away all his money to his half sisters ... ," and in her very next comment, she says, "he could not have thought of such a thing as begging you to give away half your fortune from your own child."

A gift of 3000 pounds would certainly not be even close to half of John's fortune, let alone all of it; and it couldn't ruin the John Dashwood family in the least.

Then, when talking about how easily the Dashwood ladies can live on 500 p.p.a. (though heaven forbid little Harry do without a future 150 p.p.a.!!), Fanny says, "I am sure I cannot imagine how they will spend half of it ... ," but "the set of breakfast china is ... [a] great deal too handsome, in my opinion, for any place they can ever afford to live in."

Fanny is too knowledgeable about money to really believe that 250 p.p.a. is adequate provision. And, she admits that they won't be living at anywhere near the style to which they were accustomed. I suspect that any style above the bare minimum is more than Fanny thinks they deserve. :-/

Of course, Fanny married into the family, so it might not be expected that there would be much love between her & her inlaws. She seems to be working at driving a wedge between John & his (step) family, however, though he is not unhappy about treating his relations badly.