A/N: Since I don't remember the movie well, the story will be loosely based off the synopsis on Wikipedia, with a few things changing to fit the HP universe. I've also added a few creepy scenes of my own.

Disclaimer: I do not own Harry Potter or The Omen.

Regulus was a peculiar child, Orion came to realize. He was quiet and very docile. Weren't babies supposed to cry more often? Weren't they also supposed to laugh and run about? He often just stared into space at something it seemed only he could see. And then there was the interaction between him and his brother.

When they had first taken the baby home, they introduced him to his new brother. Sirius was very fidgety to meet the baby and began crying instantly. Orion thought it was just the young child's fear of the new, but as his sons aged, Sirius still wanted nothing to do with his younger brother.

They were never in the same room for too long, Sirius always making a quick exit if he could or being fussy if he couldn't. Regulus would just sit there, minding his own business. He didn't seem to mind that his older brother seemed to hate him. Regulus was fine playing on his own.

Time passed and their relationship never improved. His wife had tried to get the two boys to like each other, always trying to get them to play together or be involved in the same activities, but Sirius would have none of that. Often, Sirius was punished for his misbehaviour but that never stopped the dislike towards his brother.

"Regulus scares me," Sirius said one day when Orion had suggested the two go outside and play.

"Regulus is just four years old, Sirius. How is he scary?" Orion asked. Maybe he would finally get down to the matter at hand and understand his son's behaviour.

"His eyes, father. There's something wrong with him. Every time he looks at me, I feel strange and my head hurts. I just want to get as far away from him as possible," Sirius said softly. The young boy looked towards Regulus who was currently being dressed by their mother.

Orion frowned. That was very strange. He never felt that way when he held Regulus, but he couldn't deny that the young child did give others around him a strange look that could be a bit unsettling.

"He's still your brother, Sirius. Family stays together no matter what. You must put your differences aside and try to be friends," Orion said encouragingly.

Sirius gave him a pleading look but then said reluctantly, "Okay, father. I'll try."

Orion finished dressing Sirius and then let the two boys run out into the yard.

"I'm going to go inside and get Kreacher to prepare us some tea," Walburga said. "We can enjoy this lovely day out here on the patio."

Orion nodded before sitting on one of the chairs. It really was a lovely day.

However, not a few moments later, there was a loud scream. Orion jumped from his seat with his wand out. Though they were hidden by the Fidelius charm, his house was not impenetrable. If a wizard broke through the wards, he could do any amount of harm, especially to his two young sons.

He ran towards the sound and through the grove of trees near the back of the property following the whimpering noises of his son. He would have to careful if the intruder were nearby.

He came upon a small gap in the trees and was met with a strange sight. Sirius was lying on the ground, in a bed of brown leaves with long, deep cuts across his arms and legs. He was crying softly as he struggled to get up off the ground. Regulus was standing above his brother with a blank look on his small face.

Orion rushed forward and picked up his son. "What happened, son? Who did this to you?" he asked worriedly, his wand still out and looking in every direction.

He was so focused their surroundings that he missed the fearful look Sirius shot his brother before he said, "I fell, father."

Orion looked at the wounds. They were deep and bright red. This was definitely not from a fall. "Are you sure, Sirius?"

Sirius' eyes widened before he said, "Yes, father. I fell out of the tree."

Orion was about to question the young boy again, when he let out another small sound of pain. Orion sighed and said, "Let's just get you back inside then." He grabbed Regulus' hand and took his two sons back to the house.

"Does Regulus seem strange to you?" Orion asked his wife one night. He had just tucked his two sons into bed. Sirius looked at him with wide eyes, holding onto him a bit longer than usual and reluctant for him to let go. Regulus just regarded him with a blank stare, barely returning his nightly embrace before laying down to sleep. Such a difference in his two sons.

Since the incident, his sons seemed to be on better terms. Sirius actually played with his brother but Orion always saw a pained expression on the boy's face. Regulus paid no mind to his brother's reluctance and took the companionship in stride. He still didn't say much but that didn't matter. Sirius always seemed to know what his brother wanted without too many words. Orion wanted to say he was happy with the boys' interaction but something felt off.

"What do you mean?" his wife as she walked into the room from the bathroom.

"He doesn't really talk like most children. He doesn't fraternize with our friends' children," Orion said. It was true. When the Crouches, the Notts and the Malfoys brought their sons over, they also stayed very far away from the young boy. The only child who stayed close was Sirius.

His wife bit her lip, looking as if she wanted to voice something she had been wanting to say for some time. Maybe she too had felt the strange feelings that sometimes accompanied the small boy. But then she shook her head. "He's just shy, Orion. He'll come around," Walburga said as she drew back the sheets to their bed and lay down.

Orion joined his wife in bed, "If you say so, my dear."