_ Thalia _
Thalia made sure they were alive, they didn't deserve to live but she wasn't going to kill them, at least yet. Then she went upstairs to deal with the pig, she found him in a bathroom and as soon as he saw her, he wet himself. The pig soon received the same treatment as his parents.
Thalia went downstairs again to see how badly the other boy was hurt. He was unconscious but alive, a lot of wounds and scars covered his back and arms but his face was mostly unscarred. The only scar was one resembling a lightning bolt, his father symbol, in the middle of his forehead.
It was then when she understood the dreams, that boy was important to her father, as Zeus only marked people that he cared. He wanted her to help the boy, to protect him for those horrible people.
Thalia had dragged carefully the boy to a sofa in the living room and had force feed some nectar and ambrosia. She thought that if her father had marked the boy he would probably be a demigod, as her father didn't care about the fate of mortals. Luckily she always carried some of them, as being a big thee kid attracted lots of monsters, even far away from the States she had been attacked by a couple of hellhounds.
After making sure the kid was alright, she went to the entrance and dragged the unconscious forms of whale and jiraffe into the kitchen. Looking through the house she found some ropes and tied them up, so in case they woke up they wouldn't bother her too much.
Without anything to do until the mysterious kid woke up, Thalia decided to watch the television. She was flipping through the channel, nothing catching her attention when a loud thunder was heard. Thalia got up from the sofa and went to the kitchen to see if the storm was back or the tied up Dusleys had woken up. Through the window, she saw that the sky had no cloud, and some stars could be seen, and the Durslues were tied and still unconcious. She turned around to get back to the sofa, she might have imagined it, and those idiots couldn't have made a noise so loud even if they had been awake.
What she saw when she turned, or better say, who she saw, surprised her. Zeus, God of the sky and King of the God, was there, standing in the middle of an ordinary kitchen in a country far away from Olympus. He was tall with black hair, a neat bear and intense blue eyes, the same as his daughter.
_ Zeus _
The first thing that he noticed when he appeared in the kitchen was an obese man and a thin woman tied together with some rope. Then he noticed his daughter observing him with curiosity, not expecting his appearance.
A crash was heard in the living room, a boy with black hair and green eyes was on the floor. The thunder, that always announced his presence, must have woken him up. The boy got up and started to observe him, confusion in his eyes, it was the first time in 13 years that Lord Zeus saw his son in person.
Before neither of them could say a word he motioned them to sit in the living room sofas and get comfortable, he had to tell them something important.
_ Harry _
Harry woke up with the sound of thunder, he was laying down in one of the Dursley's sofas with a blanket over him. He was confused as the last thing he remembered was getting dropped in the ground by his uncle after a beating. He sat up, and saw a mysterious girl looking through the kitchen. He couldn't feel any pain for the punishment so he supposed that his magic had taken care of it, so he tried to get up, but crashed in the floor.
The man and girl walked into the sofa, it was the first time he could see them, both had black hair and blue eyes, and looked to be father and daughter. The man looked familiar to Harry, but he didn't know why. The man told them to sit comfortably as he had to tell them sometime. Even though he didn't know them, he decided to do as told because he had a feeling that they could be trusted.
_Zeus_
When both of his children were sat in both sofas he started telling them everything. First he told Harry that he was Zeus, Greek God of the sky, that Greek Gods were real (and the monsters too) and finally that he was his son and Thalia was his half sister.
He told them that after having been caught by Hera with another woman, she had sent part of his essence to the mortal plane. She wanted him to demonstrate that he could be faithful to a woman. That part of him grew up being the only child of a old magic couple, Charles and Dorea Potter, and met his mother in Hogwarts. Lily reminded him of Hera and felt in love as soon as he saw her, but she saw him as troublemaker and didn't want to be with him at first. He told Harry how much his mother had love him, and that she would be very proud of him, as he was.
_ Harry_
Harry couldn't believe what he had heard, that man was proclaiming being his father, even more, the guy said he was a God and that the girl was his sister. At first, he thought that he was imagining things, that it was a dream and he was still unconscious after Vernon's beating. But after pinching himself, he realized that it wasn't a dream and that he was with two strangers in the middle of his relatives living room. Thinking about it, where were the Dursleys.
He looked at them, maybe it was one of the Weasley's twin jokes and they wanted to cheer him up. But they weren't that cruel to make him think he had a real family, so that idea was discharged. The Dursleys didn't have any imagination to do something like that and they hated everything no-normal, even though he knew they would be happy if he went away to never come back. Maybe. Maybe they were telling the trust, after all, magic wasn't supposed to exist and he was a wizard. Maybe they were his father and sister.
Harry decided that he would believe then, at least for now, maybe they were able to get him out of the Dursleys for good. If at a later date he discovered them lying, which was likely, he would get away from them. The whole situation reminded Harry strongly about how Hagrid had told him, 3 years ago, that he was a wizard.
Harry asked the stranger why he hadn't checked or visited him when he was a child. The answer was that he couldn't because some laws that forbid him from doing so, but the Gods had decided unanimously to visit their children one a week if they fulfilled their duties. Then he asked about Sirius, if he was his dad he would know Sirius. It turns out that the same laws forbid him for helping his friend, as Gods were forbidden to interfere with mortal affairs.
_Thalia _
Thalia couldn't believe that she had a brother, while at camp she had seen with envy the other campers. While she was alone everyone else had at least a sibling, even kelp-head had a half-brother to talk to.
Harry didn't seem to believe it, the poor boy had been probably so alone that this looked a joke for him. She had known about the mythological world since she could remember, but Percy had told her that at first, he had a hard time believing it. Her brother had just found out, so she would be patient and explain everything to him, her father was trusting her with it.
After a couple of minutes of uncomfortable silence, Zeus announced that he would have to go soon, and had to take care of something before.
_ Zeus _
Before going back to Olympus he had to "talk" with the Dursleys, about the treatment of his son. In the kitchen, Lily's sister and her fat husband laid in the floor tied, as they had been at his arrival. Their son wasn't there, and after asking Thalia he found him in the bathroom.
He gathered the tree Dursleys in the kitchen, untied them, sat everyone in a different chair and tied them again. After sending both of the children to pick every one of Harry's possessions, he woke them up. Vernon Dursley started screaming about freaks in his house as soon as he woke up. Her wife seems to remember him and preferred to remain quiet. Dudley Dursley looked confused at first, then terrified, he remained quiet as well.
At first, he wanted to kill them, then hurt them, finally he conformed himself with tricking with their memories, they weren't worth the trouble. He made them forget what had happened and planted false memories about Harry saying he was going to a friend house and won't come back.
Thalia and Harry descended the stairs as he was done, the Dursleys where unconscious again and Harry was ready to leave their care.
He couldn't stay much longer, so he instructed them to go to the Leaky Cauldron and stay there the next week. He told them that he would come back next Sunday. He called the Knight Bus and saw them get on the bus. With a bang, the bus was gone and soon he was too, leaving the street empty.