Jimmy’s mother was once a highly regarded scientist, but she became disillusioned with her work and quit, claiming that she simply wanted to spend more time with her son. She is depressed and her behavior is erratic and unpredictable. It is eventually suggested that Sharon knew that companies were introducing diseases into the population in order to profit from their cures, and that her and her husband’s complicit role in this activity overwhelmed her with guilt and moral anguish. Eventually she can’t take living with Jimmy’s father anymore, and leaves suddenly, telling Jimmy in a note that she still loves him, and that she has taken Killer (Jimmy’s pet racunk) with her so that the animal can be set free. While she is gone, Jimmy hears from her rarely, via secretive post cards sent from distant locations. The CorpSeCorps question Jimmy regularly about her whereabouts. Once Jimmy sees her on television protesting with a group of environmental activists. Eventually Jimmy’s mother is found and executed by the CorpSeCorps for treason.