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- Apr 4, 2007
Because the grandma was part of a cult that worships the devil. She made a deal with him that the family would be rich, but in return, would have to sacrifice their first-born son. In the beginning of the movie, you saw that she was pushing the mom to have a son, but the mom refused. The demon was just simply growing impatient because the mom just didn't wanna have another kid, therefore throwing the odds of a son out the window.