Sorry. My parents are on their way out. They’re the worst. This had not always been true, but it was now, and she wasn’t shy about saying so.
-- Sylvia (Day One paragraph 3)

Importance: This quote is one of the first clues that things are not especially well in the Post house; and further, that even if the issue is confined to Franny and Jim, its effects have spilled over onto Sylvia.

The idea had been to be together, everyone nicely trapped, with card games and wine and all the fixings of satisfying summers at their fingertips.
-- Franny (Day Two paragraph 1)

Importance: Here the reader can see Franny's heart, even with its essence of bossiness. What she really desires is to have everyone together, under one roof, to enjoy a beautiful place together. However, she also wants some amount of forced togetherness that she is able to control.

Joan looked like an excellent candidate for sex. In fact, if...
-- Sylvia (Day Three paragraph 4)