This is the story entitled "The Importance of Being Earnest".
Miss Prism's expressing concern for Jack and admiration for his devotion
to his brother are ironic because she knows from the start that Jack’s
pretences of having a brother are eventually real. He then finds out that
Algernon is his younger brother upon questioning Miss Prism at the last part of
the story.
The story is an example of situation irony because the audience did not
expect that Jack has a brother and that it will be Algernon, as opposite to
their expected ending.
