How does the author use foreshadowing in Sister: A Novel?

Chapter Two provides clues as to what happened to Tess, as well as details about her character. Tess's wild, carefree, and positive outlook on life is reinforced in Bee's description of her apartment, her relationship with Emilio Codi, and Tess' feelings towards having a baby. Details are given about the baby having cystic fibrosis, the disease that killed Tess and Bee's brother, Leo. This information will most likely be important later in the book. The reader looks for clues and facts in the story, playing detective, much like Bee must have. Foreshadowing and a sense of anxiety takes place when Bee feels the presence of a man following her. This lets the reader know that the person who abducted Tess was a man. It also makes the reader wonder if Bee is imagining him, or if he has escaped from jail and is following her.