In this Chilean legend, a woman deceived her family by being a housewife during the day and a witch at night. She would use potions to turn herself into various animals and play while her family slept, then use another potion to turn herself back into a human when morning came.
One night, she forgot to make sure the children were asleep, and they saw her turn into a sheep. As she ran off to play, the children wanted to imitate her and turned themselves into foxes. When they couldn’t turn back into children, their cries woke their father. Seeing what had happened, the father threw all the potions into the river in a rage. When the wife came home, she couldn’t turn herself back into a human and was doomed to remain a sheep.