That woman on the bull is Europa (Ancient Greek Εὐρώπη, Eurṓpē), daughter of the Phoenician king Agenor, lived about 2000 BCE. The bull is the shapeshifted Zeus that is kidnapping Europa. They had sex and sired Minos, king of Crete. Minos is the one who feed the Minotaur by sending children into its labyrinth.
The bull that fathered the Minotaur was not Zeus, it was a gift by Poseidon who expected king Minos to sacrifice the bull to Poseidon. The king kept the gift and sacrificed another bull, Poseidon got pissed and had the king's wife screw the bull, giving birth to the Minotaur.