How does the author use foreshadowing in I'm Not Rappaport?

Although Nat's stories and deceptions are entertaining, Gardner gives clues that this cannot possibly last forever. At several points in the play, he foreshadows or predicts events that happen later. For example, when Nat's daughter, Clara, is introduced, she is upset that she has had to cover for Nat with Danforth. Clara says, "I came to tell you it's the last time! No more calls—" Without Clara helping Nat by assuming the various identities he pins on her, it is only a matter of time before his many stories start to unravel.