Who is The Woman who Married the Sun from The Way to Rainy Mountain and what is their importance?

The story states that a child was placed in a tree for safety. While in the tree a bird came along and lured the child away. The child followed the bird high into the sky where the child grew into a woman, and the bird became the sun. The woman married the sun and gave birth to a boy child. The woman was killed by the sun in a fit of anger.