From Dusk Till Dawn

Nyx was the goddess of the night and Aether was the god of the light, their paths crossing only at dawn and dusk. Somehow, they fell in love and had a set of triplets. Some of the gods feared the children and some were overjoyed. As Nyx was giving birth, her brother, Erebus bestowed the gift of darkness on each of the three babies. Gaia was appalled at the gift and added the gift of light and earth.
Nyx was afraid of what her children would be. After their birth, she noticed they were each gifted and very different. She named them Drake, Luke, and Helen. They grew to be stronger than any other human, with unique gifts and powers. When they reached adulthood, Nyx and Aether grow worried over their children's lack of control and lust for bloodshed. They needed to figure out a way to calm their beasts. Themis came to them and made a suggestion, being the goddess of animal instinct, she told them that mating would calm them. That night, Nyx spoke to Astraea, the goddess of the stars and asked for help. Together, while her children slept, she took half of their souls and Astraea scattered them amongst the stars, each falling to the earth to find the right match.
The three children of Light and Darkness are still struggling to make peace and co-exist, what can their parents do now to help them?