**Chapter 6: Claimed by the Black Star**

The moment of truth had finally arrived, and Regulus could feel his heart racing with anticipation as Sirius's body hovered above his. He had been waiting for this, begging for it, and now that it was here, he was both excited and terrified. Sirius's eyes seemed to burn with desire as he reached down, his hands grasping the waistband of Regulus's underwear. With a gentle tug, the fabric ripped apart, exposing Regulus's vulnerable flesh to the air. Regulus felt a shiver run down his spine as Sirius's gaze fell upon him, his eyes drinking in the sight of Regulus's trembling body. But it was what Sirius did next that made Regulus's eyes widen in shock. He reached down, his hand grasping the base of his own cock, and began to stroke it, the length of his shaft emerging from his pants like a work of art. Regulus's eyes went wide as he took in the sight of Sirius's massive cock, its length and girth unlike anything he had ever seen before. It was huge, a veritable horse cock that seemed to pulse with life as Sirius stroked it. Regulus felt a wave of fear wash over him, mixed with a healthy dose of excitement. How was he supposed to take that? The thought was both thrilling and terrifying, and Regulus couldn't help but wonder if he was truly ready for this. Sirius seemed to sense his hesitation, and he leaned down, his lips brushing against Regulus's ear. "Don't worry, my love," he whispered, his voice husky with desire. "I'll be gentle. I promise." Regulus felt a shiver run down his spine as Sirius's warm breath caressed his skin. He knew he was in good hands, and that Sirius would take care of him. But as he looked down at Sirius's massive cock, he couldn't help but wonder if he was truly prepared for what was to come. With a gentle nudge, Sirius encouraged Regulus to spread his legs, and Regulus felt a surge of excitement as he complied. Sirius's cock pressed against his entrance, the head probing gently for a moment before Sirius began to push inside. Regulus felt a wave of pain mixed with pleasure as Sirius's cock invaded him, stretching him to his limits. He gasped, his body trembling with the effort of accommodating Sirius's massive shaft. But as Sirius began to move, his strokes slow and gentle, Regulus felt the pain begin to subside, replaced by a growing sense of pleasure. It was like nothing he had ever experienced before. Sirius's cock seemed to touch every inch of his body, stimulating him in ways he never thought possible. Regulus felt himself getting lost in the sensation, his body responding to Sirius's touch in ways he never thought he was capable of. As Sirius continued to move, his strokes growing stronger and more confident, Regulus felt himself being claimed, marked by the Black Star as his own. And as he looked up into Sirius's eyes, he knew that he would never be the same again.