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Dominant Alpha & Omega

Summary:

Regulus and James had being in love since they were teens, they are fucking, and Regulus finally decides he wants it, he wants the mark.

Work Text:

The air in the master suite of Potter Manor was thick—saturated with the heavy, intoxicating scent of cedarwood, toasted spice, and the sharp, metallic tang of arousal. It was a scent profile that had defined the last five years of James Potter’s life, a fragrance he would recognize in the middle of a war zone. It was the smell of home, but more importantly, it was the smell of Regulus Black.

Regulus was not an omega who waited. He was a dominant omega, a contradiction of biology and steel-willed personality that had brought James to his knees the moment they had first locked eyes in their adulthood. And right now, Regulus was proving exactly why he held the reins of their relationship.

“James,” Regulus gasped, his voice a jagged edge of a sound.

He was perched precariously on James’s lap, his pale skin glowing like moonlight against the dark charcoal sheets. His hands were braced firmly against James’s broad chest, pushing off him to gain leverage as he moved. Regulus’s head was thrown back, his dark curls damp with sweat, clinging to his forehead and the nape of his neck.

James groaned, his large hands sliding up from the bed to find purchase on Regulus’s waist. He didn't just hold him; he gripped him, his fingers digging into the soft, yielding skin of Regulus’s hips, anchoring him. James was a dominant alpha in every sense of the word—large, powerful, and brimming with a protective instinct that bordered on feral—but with Regulus, he was a captive audience.

“You’re so tight, Reg,” James grunted, his hips bucking upward instinctively to meet Regulus’s downward slide.

Regulus let out a high, fractured moan, his eyes fluttering shut. He was taking all of James, every inch of the thick, heavy heat that James offered, and he was doing it with a desperate kind of greed. He liked the control, liked being the one to set the pace, but the sheer size of the man beneath him was starting to turn his thoughts into a blurred, white-hot haze.

“Shut up,” Regulus hissed, though there was no bite in it, only need. He leaned forward, his chest brushing against James’s, his breath hitching as he felt the friction of their skin. “Just… don’t stop. Don’t you dare stop.”

James chuckled, a low, vibrating sound that Regulus felt deep in his bones. “I couldn’t if I wanted to, love.”

James tightened his grip on Regulus’s waist, his thumbs tracing the elegant curve of his hip bones before he took over the rhythm. He began to thrust upward with a brutal, rhythmic precision, his strength overwhelming Regulus’s attempt at dominance. Regulus’s breath left him in short, rhythmic puffs, his hands migrating from James’s chest to his shoulders, fingernails digging into the alpha’s tan skin.

“James! Oh, god, James!”

The room was filled with the sound of their bodies colliding, the wet slap of skin, and the frantic, uninhibited sounds Regulus was making. Normally, Regulus was the picture of Black family composure—stoic, elegant, and quiet. But James Potter had spent years dismantling those walls, and in the heat of their bedroom, there was nothing left but raw sensation.

Regulus was a mess—a beautiful, panting, moaning mess. His eyes were blown wide, the grey irises almost swallowed by his pupils. He felt James’s cock deep inside him, hitting a spot that made his entire body spark with electricity.

“You want it, don't you?” James whispered, his voice dropping into that low, alpha register that made Regulus’s inner omega whine with submission. James leaned up, biting softly at the sensitive cord of Regulus’s neck. “I can feel it. Your scent is changing, Reggie. You’re ready.”

Regulus shook his head, though he was leaning into the touch. They had been together for years. They had shared everything—secrets, a home, a life—but they had never taken the final step. James had always waited, giving Regulus the space to be his own person, to not be ‘claimed’ in the way the old pureblood families demanded.

But tonight, the independence felt like a lonely island. Regulus didn't want to be his own; he wanted to be James’s. He wanted the world to smell the Potter alpha on him and know exactly who he belonged to.

“Mark me,” Regulus choked out, the words finally breaking free. He grabbed James by the hair, pulling his head back so he could look into those hazel eyes, hidden behind gold-rimmed glasses that were currently askew. “James. Mark me. Now.”

James froze for a fraction of a second, his heart hammering against his ribs like a trapped bird. “Regulus… are you sure? Once I do it, it’s forever. There’s no undoing a bond like ours.”

“I’ve belonged to you since I was sixteen years old, you idiot,” Regulus cried out, a sob of pleasure and frustration catching in his throat as James gave a particularly deep thrust. “Claim what’s yours. I want your mark. I want it.”

James didn't need to be told again. The alpha in him, usually kept on a short leash, roared to life. He flipped them in one fluid motion, pinning Regulus to the mattress. He caged Regulus’s hands above his head with one hand, his large palm easily covering both of Regulus’s delicate wrists.

He stared down at him, his gaze burning with a possessive fire. “You’re mine, Regulus Black-Potter. Every inch of you.”

Regulus bared his throat, arching his back, inviting the pain and the pleasure. James leaned down, his nose brushing against the scented gland at the base of Regulus’s neck. He licked the spot once, a soothing gesture, before he opened his mouth and bit down.

Regulus screamed—a sound that was half-agony, half-ecstasy. He felt James’s canines sink deep into his skin, breaking the surface, and then the rush of the bond hit him. It was like a dam breaking. Suddenly, he could feel James’s tethered soul, his warmth, his unwavering love, and his fierce protectiveness flowing directly into his own bloodstream.

As the mark settled, James didn't pull away. He began to fuck him again, but it was different now. It wasn't just a pursuit of climax; it was a celebration. It was a seal on a contract written in blood and sweat. He buried his face in Regulus’s hair, whispering praise, telling him how beautiful he was, how much he loved him, while Regulus clung to him, his legs wrapped tightly around James’s waist, dragging him closer and closer until there was no space left between them.

When they finally broke, coming together in a synchronized explosion of sensation, it felt like the stars had aligned.

A half-hour later, the room was quiet, save for the crackle of the dying fire in the hearth. Regulus was draped across James’s chest, the new mark on his neck glowing a faint, angry red, though the stinging had turned into a dull, comforting thrum.

James was stroking Regulus’s hair, his fingers gentle. He felt like he was floating. The bond was a constant, warm hum in the back of his mind, telling him that Regulus was safe, Regulus was happy, and Regulus was his.

However, the hormone spike that came with a fresh bond was no joke.

James shifted, feeling a familiar tightness returning to his lower abdomen. He leaned down, inhaling the scent of the mark. It smelled like Regulus, but now it was underlined with James’s own woody musk. It was the best thing he had ever smelled.

Regulus stirred, feeling the shift in James’s body. He lifted his head, a sleepy, smug smirk playing on his lips. “Again, Potter? You’re such a cliché.”

“Can you blame me?” James growled playfully, his hand sliding down from Regulus’s hair to cup his rear. “You smell… incredible. And the bond is making me crazy.”

Regulus hummed, a sound of pure satisfaction. He shifted his hips, feeling James’s arousal pressing against his thigh. “I suppose I could be persuaded. Since you did such a good job with the marking.”

“A good job?” James laughed, flipping Regulus over again. “I’ll show you a good job.”

This time, the sex was slower, more indulgent. It was filled with soft kisses and whispered promises. James worshipped every inch of Regulus’s body, from the tips of his toes to the crown of his head. He was thorough, patient, and intensely focused on Regulus’s pleasure, making the omega cry out his name until they were both spent and tangled in a heap of damp limbs.

Three Weeks Later

The kitchen at Potter Manor was filled with the smell of breakfast. James was at the stove, humming a jaunty tune as he flipped pancakes. He looked every bit the happy husband, his sleeves rolled up to reveal his forearms, his hair a permanent disaster.

Regulus was sitting at the table, staring at a plate of eggs with an expression of profound betrayal.

“Is something wrong with the eggs, Reg?” James asked, turning around with a spatula in hand. “I made them exactly how you like—soft scramble, dash of pepper.”

Regulus swallowed hard, his throat working. “They smell… aggressive.”

James blinked. “Aggressive? Reg, they’re eggs. They don't have a personality.”

“They smell loud, James! Just… take them away,” Regulus snapped, though his eyes looked watery. He shoved the plate toward the center of the table and leaned his head in his hands.

James’s brow furrowed. He set the spatula down and walked over, his alpha instincts immediately going on high alert. He placed a hand on Regulus’s back, rubbing soothing circles. “You okay, love? You’ve been a bit off all week. Headaches, tiredness… and now the egg betrayal?”

Regulus leaned into James’s touch, sighing. “I don't know. I think I might have caught that bug Sirius had. My stomach has been in knots since yesterday.”

James leaned down, his nose drifting toward Regulus’s neck. He did it out of habit now, checking the bond, checking the mark. But today, something was different.

The scent of Regulus had changed. It was still cedar and spice, but there was something else underneath it—something sweet, like ripening fruit or milk and honey. It was subtle, so faint that a beta wouldn't have noticed, but to James, it was like a siren song.

His heart skipped a beat. A very specific, very terrifying, very wonderful beat.

“Reg,” James whispered, his voice trembling.

“What?” Regulus grumbled into his palms.

“When was your last heat?”

Regulus went very, very still. He lifted his head slowly, his grey eyes wide. He began to do the mental math, his fingers twitching on the tabletop. He counted once. Then he counted again.

“I’m… I’m two weeks late,” Regulus whispered, the blood draining from his face.

James felt like he could fly. He felt like he could burst into a thousand pieces of pure sunlight. “Regulus. The marking. The… the three times we did it that night. And the morning after.”

“And the afternoon after that,” Regulus added faintly.

Without a word, James grabbed his coat from the back of the chair.

“Where are you going?” Regulus asked, his voice rising in pitch.

“To the apothecary. Or the hospital. Or both!” James shouted, already halfway to the door. “Stay there! Don't move! Don't eat the eggs!”

Regulus sat in the silence of the kitchen, his heart hammering in his chest. He looked down at his stomach, which was still flat and toned. A baby? A tiny, messy, loud Potter-Black?

He should have been terrified. He was a Black, after all; his upbringing hadn't exactly been a blueprint for healthy parenting. But as he touched the mark on his neck, the golden warmth of the bond flooded him. He felt James’s sheer, unadulterated joy echoing through the connection, and for the first time in his life, the fear vanished.

Twenty minutes later, James burst back into the house, nearly tripping over the rug. He held a vial of shimmering blue potion in his hand. “Drink it. It’s the most accurate one they have.”

Regulus took the vial with shaking hands. He drank it in one go. It tasted like peppermint and anxiety.

They sat on the kitchen floor together, leaning against the cabinets, waiting for the potion to react. James held Regulus’s hand so tightly their knuckles were white.

“Whatever it says,” James whispered, "I love you. You know that, right?”

Regulus leaned his head on James’s shoulder. “I know. I love you too, James.”

The potion in the vial began to glow. It shifted from blue to a soft, pulsing gold—the exact color of James’s Patronus. The color of magic, of life.

James let out a sound that was half-laugh, half-sob. He pulled Regulus into his lap, burying his face in his neck, right over the mark he had made three weeks ago.

“A baby,” James choked out. “We’re having a baby.”

Regulus felt tears prickling his eyes, but he kept his voice steady, his dominant omega nature returning now that the uncertainty was gone. He ran his hand through James’s messy hair, pulling him back so he could look at him.

“Well, Potter,” Regulus said, a watery but genuine smirk on his face. “I hope you’re ready. Because if the child is anything like you, we’re going to need a much bigger house. And probably a lot more of those pancakes.”

James laughed, bright and loud, and kissed him—a deep, lingering kiss that tasted of their future. “I’ll make all the pancakes in the world for you, Reggie. For both of you.”

Regulus leaned back against the cupboards, wrapped in the arms of his alpha, feeling the double heartbeat of their bond and the new life beginning inside him. He had spent his life running from his family name, but here, in the warmth of the Potter kitchen, he realized he hadn't just escaped.

He had finally come home.