I might go a bit different on this and suggest an alternate way of examining the poem. There is the literal meaning of the poem in terms of the mother being stung by the scorpion. I would probably say that this event is a metaphor for how individuals of all background and faith orientations are challenged by the force of death. The villagers, rooted in their traditional approaches to faith, are incapable of alleviating the woman's suffering, the children's uncertainty at seeing their mother's plight, and the husband's fears that his wife will die and there is nothing he can do to stop it. At the same time, the father, who believes in Western medicine and rationalist approaches, is equally trapped in that the doctors and approaches cannot alleviate the condition of his wife or of the husband's pain. The metaphor might be that there are conditions that cannot be effectively alleviated by either culture.