In this analogy, Thomson describes a situation involving a very small house, one person, and a rapidly growing child. The child continues to grow and become bigger and bigger; the house cannot support such growth and the person in it is crushed. Eventually, the walls of the house will explode and the person inside will die. The child, however, will just finish growing and will leave the house in perfect condition. The person represents the woman, the house represents her body, and the growing child represents the fetus. From this analogy it is evident that as the fetus grows and completes its nine months of growth, the woman dies in the process. Thomson does not believe that the woman, knowing that she has a health problem that will kill her if she continues the pregnancy, should simply sit back and wait for the pregnancy to kill her, since it would be immoral for her to abort. . According to Thomson, it would be morally permissible for a woman to abort under her right of self-defense. Although Thomson claims that "in this case there are only two people involved, one whose life is threatened and the other who is threatening it." Both are innocent: the one who is threatened is not so because of a fault, the one who threatens does not threaten because of a fault" (43), she does not believe that because the woman and the fetus are innocent, this should ensure that no action is taken or that they have any say in the matter. Thomson believes that a woman should exercise her right to protect her life from the fetus that threatens her, because she owns her body and not the fetus. Once again, this supports her argument that a woman's right to decide what to do with her body trumps the fetus's right to