Hera

In Greek Myths, Tiresias was a man that was changed into a woman by a pair of mating snakes spawned by Hera, either as punishment for a minor offense, or because of a disagreement between Hera and Zeus.

The Myths mentioned that, as a woman, Tiresias became a priestess of Hera, married and had children, including Manto, who also possessed the gift of prophecy. After 7 years, Hera was satisfied and sent a new pair of mating snakes and allowed him to go back to normal.

In this animation, Hera uses her gender-shifting snake on a lover of Zeus, making her into an inverted Tiresias. She seems to enjoy the final result