She married a mortal chief . But she soon found he was not fond of her cooking. He never touched his nice juicy portions of roasted human flesh. Then he complained about children’s poop left lying around and she had to invent the earth closet to keep him quiet.
Being called the Dinner and Poop Lady was more than she could bear so she returned to her old home in the sky. Now she can send for a tasty flesh takeaway, and there are no lavatory problems. Just use the heavenly thunderbox and empty it on Earth when full.