Still only own the plot.
On Olympus, the Olympians and the wives of the Big Three and Triton were confused as to why they had been summoned. Suddenly, the Big Three flashed into the throne room. The three were carrying babies. The Immortals knew what this meant.
"ZEUS! HOW DARE YOU BREAK THE OATH AND CHEAT ON ME!" Hera cried out, at the same time as Amphritrite and Persephone were reprimanding their husbands.
"ENOUGH!" The Big Three yelled simultaneously. The Immortals quietened down. "The Fates appeared to us and told us to have these children and raise them up with us and on Olympus. They are to be the Princes and Princess of Olympus and be more powerful than any other demigods and to be gods when they are older."
The gods were stunned. Ever cynical, Hera narrowed her eyes. "How do we know this?" Zeus rolled his eyes.
Suddenly, the Fates appeared and, in their feathery voices, said, "It is true. These three demigods will grow to be the most powerful demigods. The son of Poseidon shall be more powerful than the other two, but marginally. They shall be loved by the world. The son of Poseidon shall be the child of the Prophecy. We cannot spoil the future anymore." The Fates then disappeared.
The Immortals stood, stunned, at the Fates' words.
Hera came to Thalia, looking at her daughter. The young girl opened her eyes. Hera loved the girl. She reminded Hera of Zeus. She looked up to see Zeus watching her with a question in his eyes. Hera nodded, and both were sporting matching grins as they looked down at their sleeping Princess.
Amphritrite and Triton made their way to Percy. Amphritrite picked him up and gasped. Percy was practically a clone of his father. Triton had his mother's eyes and temperament, but Percy was completely his father when it came to his looks. Amphritrite nodded at Poseidon. She passed him to Triton. Triton looked at his half-brother with disdain, but that quickly faded as Percy smiled in his hands and fell into a deeper sleep in his brother's arms. Triton barely registered his quick nodding, he was too caught up in how cute his baby brother looked. The Prince had quickly made them love him.
Persephone and Demeter approached Nico. They looked at the small boy and gaped at the small baby, who looked uncannily like his father. They nodded, vaguely. If Hera and Amphritrite could give their royal children a chance, so could they.
The Big Three grinned and said, "Well, we all need to train them if they are to be the most powerful. However, when they are about seven, we will start training them. Until then, only their parents may teach them in their powers."
Poseidon looked at his son, who had just whispered something to him. "Brother, if I may put forward an idea?" Zeus nodded, making a 'go ahead' motion with his hand. "Triton here is my heir, as you all know. He, however, has had the idea that Percy should go through the Trial when he is twelve to obtain his position for when he becomes a god."
Zeus nodded. "That's a good idea. I believe in doing the same. Hades?" Hades nodded, indicating his agreement. "Then we are all agreed. For now, Thalia will live here, Percy may live in Atlantis and visit here as often as he likes and Nico may live in the Underworld and visit here as often as he likes. All who agree?" All the gods raised their hands. "Good. Now, the children will meet their Olympian family."
The babies were passed around the Olympians, all of whom blessed the children as they all loved them. Even Artemis, who hated all those of the male species, loved the two boys.
Zeus gave the three demigods the gift of a strong sense of justice (to his daughter, he also gave the gift of lightning and all the powers which he himself had);
Hera gave them the gift of compassion and diplomacy;
Poseidon gave them the gift of breathing underwater (to his son, he also gave all the powers which he himself had);
Demeter gave them the power of chlorokinesis and cooking;
Ares gave them the gift of being able to master any weapon and to be able to fight like an expert;
Athena gave them the gift of wisdom and the gift of being talented in the arts;
Apollo gave them the gift of archery and music;
Artemis gave them the gift of respect towards all creatures and the gift of advanced intuition and intellect;
Hephaestus gave them the gift of pyrokinesis and a limited resistance to fire;
Aphrodite have them the gift of charmspeak;
Hermes gave them the gift of being able to lie efficiently (but to know when it is acceptable to lie);
Dionysus gave them the gift of being able to turn people crazy;
Hades gave them the gift of summoning riches (but only if they really needed it; and to his son, he gave all the powers he himself had);
and lastly Hestia gave them the gift of humility and taught the demigods life lessons on how to act towards others. Each Immortal who knew that their gift could be misused, taught the three Olympian treasures the correct time and place to use those powers.