Mrs. McKenzie is Claire's mother. Ever since Claire was diagnosed with leukemia, Mrs. McKenzie has been self-medicating with alcohol. Now, she's a terrible alcoholic who lives vicariously through her teenage daughter's life. Mrs. McKenzie has inappropriate relationships with many of Claire's friends, and often sides with them in fights rather than siding with her own daughter. At the end of the novel, Claire is forced to call child protective services on her mother in the hopes that they will force her into Alcoholics Anonymous
