The correct answer to this open question is the following.
Unfortunately, you did not mention the name of the story, the novel, or the book.
What is the reference? There is no text or excerpt attached.
However, trying to help you we assume you are talking about Debby, an important character os the story "The Great Gatsby."
The crazy thing that Daisy says during dinner was the following.
Daisy is frivolous, as she always been, trying to catch people's attention. At that moment of the dinner, she is angry and tells Nick Carraway that she is cynical and lets him know that she is living a difficult moment in her marriage. She is not satisfied with his husband, Thomas Buchannan.
That is why Nick Carraway considers that this would be the perfect moment for Daisy to divorce, although the truth is that Daisy is too frivolous and nonchalant to do it. There are interests that bind Daisy and Thomas, a very rich man.
"The Great Gatsby" is a novel written in 1925 by American author F. Scott Fitzgerald.