She’s the swinging grandmother.
It all started when she was a young and very beautiful Love Goddess. Full of high spirits, she liked to swing from heavenly heights on a vine until one day jealous rivals cut through it. She made a big splash when she plummeted into the primordial ocean. There was no way back.
So she floated with the wind and waves, which went out of their way to waft her into pregnancy. This caused her to give birth to just about everything and it all became a little crowded.
As she floated she became more bloated, supporting lots of life, and she grew larger and larger until one day she was as big and round as the Earth. Because that is exactly what she had become. The grandmother of all Earth Mothers.