You tease him some more.

"You want to go back to being an alpha?" You ask in a mocking tone of voice. "You want to be like this?"

Then you whisper under your breath: "I'm an alpha."

The change takes only moments. Your skin feels tight and stretched. You can feel your bones lengthening and your muscles hardening and expanding. Your head climbs higher by maybe half a foot as your body swells in proportion to take up more space. You feel an odd sense of confidence feel your mind. You're on top of the world and were meant to be there. There wasn't anything you couldn't do, and everyone should get out of your way or else expect to get run over.

Sadly, your clothes didn't change with the rest of your body. You don't notice at first as your skin already felt tight and constricted. But as you reach your full size your shirt and pants tear apart like you're Bruce Banner hulking out. Your shirt is only barely holding on to your frame as it is reduced to tatters. Your pants fair much worse as they snap at the waistband and fall to the ground. Your underwear follows suit as well and you're left standing naked in front of your omega brother.

You feel slightly embarrassed for a moment until you look at your brother. His face is flushed, his mouth is hanging open and his eyes rove over your body with naked desire. His hands clutch at his chest, and he shrinks into himself in a way that you find utterly adorable. His eyes are slowly drawn lower and lower as he feasts on the sight of your muscles, until they lock on the sight of what's between your legs where they freeze.

You glance to the side at your mirror and take in the sight of yourself. You're as ripped as all hell. Your shoulders are as wide as an axe handle. Your arms look like your muscles have been replaced with steel wires, your pecks bulge with strength, your waist is narrow giving you a classic triangular body and your abs have formed into a ridged six pack. Your thighs and legs look like you could run marathons back-to-back. And your dick is at least nine inches long even while it's soft with a pair of tennis balls bulging out of your sack.

You can't help but flex your muscles a little to see how your muscles go tight at your command. You love the incredible feeling of strength and power they fill you with. Your brother takes a half step back and tries to make himself look even smaller as you display your dominance. His head tilted down submissively. But his eyes never leave your body as he is utterly entranced by the sight of you. You smile at him, and his blush somehow grows even more crimson.

"Yeah, you want to go back to being like this don't you?" You ask teasingly. "I don't blame you; I could get used to feeling like this all the time."

"You're even bigger than I was." John says timidly. "If you stay like that, I won't ever be able to be mean to you again. There's no reason to keep me like this. Please change me back Tom. I don't like this."

"No, you wouldn't." You agree. "I'm far more of an alpha than you ever were. But I can think of a few reasons to keep you an omega though."

For just a moment you swear you see a flash of excitement in John's eyes. You guess a part of him likes the idea of what you might do to him. Omegas are naturally submissive after all. You also notice his nostrils flair as he catches your scent, and you think he must like it as his eyes get a little glassy. He rallies though and presses on.

"You don't need to keep me an omega." He whines. "I've learned my lesson. I'm sorry for how I treated you. I'll never do it again; I can't do it again if you stay like this."

"But this isn't about teaching you a lesson." You declare. "This is about your punishment, and that's not done yet. Plus, now you've seen me naked. I think you should return the favor."

"No Tom, please don't." He begs.

"Strip omega." You growl.

He whines pathetically again but he does as you tell him. He turns to face away from you as he grabs his shirt and slowly pulls it over his head. He looks so small and timid. You could cover up his shoulders with your hands or fit them around his waist. He looks so soft and pliant, you're certain you could leave bruises on his skin just by squeezing him hard enough. He kicks off his shoes and socks, dragging out his impending embarrassment, but you can't help but feel like he's teasing you. He hesitates when his thumbs hook under the waist band of his pants and underwear, but you make another soft growling noise, and he quickly pushes them down his legs.

He bends over at the waist for a brief moment as he pushes his pants to the floor and steps out of them. You're treated to the wonderful sight of his perfect shapely ass. His cheeks look so soft and round. The one part of his body you couldn't completely swallow up with one of your hands. And between them you catch the briefest glance of his rosebud, his little boy pussy just begging you to seize and ravage it.

Your heart rate picks up as a sense of hunger settles into your guts. You feel your cock twitch and begin to stir. Every memory of anger and resentment you've ever felt towards your brother for how he's lorded his status over you in either of your memories dies away. Replaced by an almost overwhelming desire to hide him away and keep him safe.

"He's so innocent and helpless like this." You think to yourself. "Any alpha could just snap him up right now and do whatever they wanted to him. They can't do that. He's mine. My brother. My pack. My omega. I have to make him mine and keep him safe."

Without even thinking you walk up behind him and as he stands up you wrap your arms around him and pull him flush against your chest. He feels so right there, pressed up against you and shielded from the world. His body is just as pliant as you imagined. He melts back into your arms even as he gasps startled by you.

You easily rest your head on top of his and breathe in the scent of him. It's sugary and tempting, sweet and enticing. No alpha could ever get a lungful of him and hold themselves back. There's something else there too, something spicy hidden under his scent. You can tell he's fertile, healthy and ready for breeding. God, it makes your mouth water.

You **** him to turn with you as you face the mirror once more, allowing you to get a good look at the front of him. You're amazed by just how feminine he looks. With his wide birthing hips, narrow flat belly and perky nipples he has the perfect hourglass look. The only trace of fat on his body besides his hips is his breast which have just enough mass to them to maybe need an A cup bra. His skin is blemish and hair free giving him a doll-like look. Even his dick looks oddly girlish. It stands almost painfully erect but it’s smaller and thinner than any of your fingers and his balls don’t look any larger than grapes.

"Look at yourself." You order as you put a hand beneath his chin and **** him to look straight ahead at the mirror. "Look how submissive and breedable you are. Look at how demure and tiny you are and tell me with a straight face that you deserve to be an alpha. That you weren't born to be taken care of by a real man."

"I!" John manages but then stops. "I-" he tries again. "I deserve-" then his eyes drop as reality settles in for him. "I deserve to be an omega." He admits. "You were right to make me this way."

"Good boy." You compliment him and you can feel his body shudder in pleasure at his words. "You were always an omega deep down inside. All I did was help it all come to the top. I think we're ready to move on to the next part of your punishment. Though you might think of it as a reward now that you're like this. It can be both though. A punishment for any lingering alpha part of your mind and a reward for the blossoming omega you're growing into."

"No Tom, we can't." John tries to defy you, shaking in your grip but making no effort to free himself. "I might be an omega now but you're still my brother. It wouldn't be right."

"That wasn't what you were thinking when you first came into my room." You remind him. "Besides, am I your brother right now or am I your alpha?"

"You're my alpha." John admitted as his eyes sank to the floor in submission.

"That's right, pretty boy." You praised him. "And what do omegas do for their alphas?"

Instead of answering you, John slipped down to his knees and turned to face you. You loosened your grip on him so he could do so. With his face at crotch level, you lifted up your swelling dick and dropped it down on his face. Nine inches had grown to ten, and it showed no sign of slowing. John's face was almost completely buried beneath your meat. He opened his mouth wide and licked a long stripe from the base up to your tip.

Sweet Jesus his tongue felt good. Your heart was hammering in your chest as it pumped more and more blood into your cock. You had never had the courage to come out as gay to your family, especially with how much of an ass your brother had been back in your old world. How many nights had you'd fantasized about putting him in his place and forcing your dick into his mouth to make him the cocksucking little faggot he was always putting others down as in his tirades? And now it was really happening.

Once he made it up to your tip, he swirled his tongue over your head a few times and then went back down to the base. Up and down, he worked, from base to tip and back again. Occasionally pausing to slather the sides of your dick as best he could. Once he had a good coating of saliva over as much of it as he could reach, he grabbed the base of your dick and pulled down so he could kiss the top side of it and lick it even more.

He put the tip of your dick to his lips and started kissing it as he pumped away at the shaft with both hands. You ran your fingers through his hair petting him affectionately. Slowly he started to slide his lips over the head of your cock as he kissed at its slit. You pulled his head back and then shoved it into the base of your dick to cover his eyes with your balls before you let them drop down onto his waiting tongue.

"Such a good little slut you are." You praised as John got one of your balls into his mouth and sucked on it. "You love worshiping a real man's dick, don't you? How big was your dick when you were an alpha?"

"Eight inches, alpha." John admitted as he breathes in deep and drowned in as much of your alpha musk as he could.

"Even at your best you were still beneath me." You pressed him. "This is exactly where you deserve to be."

"Yes alpha." John agreed. "Let me worship your dick alpha. It's what I was born to do."

"Open wide." You ordered as you yanked his head back. He did as he was told, opening his mouth as wide as it would go and sticking out his tongue like a red carpet waiting for your manhood. "Good boy. My precious sweet little omega. Get ready, here it comes."

You shoved your cock into your brother's mouth. He got four of your eleven inches in before he gagged and stopped. But he sealed his lips up tight and gave a nice, good suck as his mouth surrounded your meat like a velvet glove. It was so wonderful. You would be perfectly happy to keep your dick in there for the rest of time.

John pulled his head back and then pushed forward while his hands did their best to work the rest of your dick like his life depended on it. His tongue danced over as much of you as it could reach. He slurped and sucked as he tried to get you deeper and deeper into his mouth. He managed to get five inches in, then six before he hit the limit of what he could manage as a virgin cocksucker.

It was wonderful though. Better than you had ever imagined. You felt like you were going to melt in his mouth as the pleasure just grew and grew. And the sight of him, on his knees, bobbing on your dick with both hands wrapped around them. His eyes would steadily lose focus as he drowned in the pleasure of servicing a superior dick, then sharpen as he redoubled his efforts to get more of you into his mouth. He was so helpless and yet so determined, so eager to please and so lost inside his own mind. He was a treasure that you would do anything to take proper care of.

You might have been content to let him keep going at his own pace. He was certainly going to make you cum eventually if he kept this up. If he was a beta, you would've let him, kept him comfortable, allowed him to discover himself as he settled into his natural place in the world. But he was an omega, he needed to get good at this. This was what he was made for, you couldn't let him hold himself back.

"You're doing such a good job baby." You praised him. "But I know you can do more. Let me help you, my sweet omega."

You let your hand slide around to the back of his head and held him in place. You pulled completely out of his mouth so he could take a deep breath. Then you rolled your hips forward and pushed back into his mouth. You felt him gag and tense up, but you didn't stop. Thrust after thrust, you **** inch after inch into his throat. Seven inches, eight, nine. You saw his eyes roll back into his head as his hands fell away from your shaft. You pulled back and let him take a few gulps of air. Then you were back into him. This time you got eight inches deep before he gagged. Roll and thrust, roll and thrust, pushing deeper and deeper. Nine inches, then ten, when your balls hit his chin, you felt his body convulse as his little omega clitty made a mess on your floor. Finally, you pressed his lips to your pelvis and completely buried yourself down his throat.

You held him there for a slow count of five seconds before you pulled back to let him breathe. He looked so completely debaucherous, breathing so deeply, his mouth hanging wide open, spit and precum trailing from the tip of your dick to his mouth, his eyes glassy and clouded with pleasure and submission. He was so perfect like this. You pressed back into his throat and got nine inches deep before he gagged again.

You repeated the process over and over as you fucked his throat into submission. Three more times you put his lips to your pelvis before finally his body stopped fighting you. Now you could thrust smoothly into him and were free to use his throat as your cock sleeve. You did just that, fucking him hard and deep.

"Go ahead and touch yourself baby." You ordered him, his fingers slid around his little clit and started tugging it back to life. His other hand grabbed hold of his tits and began to tug and twist them. "That's it. Learn to love this. You're a good omega who lets your alpha drain his balls into your guts. You deserve to feel good. You deserve to love every second of this."

He moaned sinfully in response and started moving his tongue again as you slid your heavy cock over it. Now when you buried yourself as deep as it would go, he did his best to suck you hard in response. It was all so heavenly and blissful.

Steadily your orgasm began to grow. You would've loved to go as deep as you could and see how much you could make his belly swell up. But there were more important matters to see to first. You held him deep a few more times until you were certain he was seeing stars. Then just before you blew your load you pulled out.

With one hand you held his head still and with the other you beat your meat as hard as you could. John opened his mouth wide to give you the perfect target. After just a few seconds more you felt your balls contract and saw a huge load bulge its way up your cock. Then you exploded over him.

The first shot mostly went over his head, but a thick rope of cum settled on his hair, forehead, over one of his eyes and the tail end of it fell in his mouth. He shuddered at the taste of it. The second shot went right over his face and started running down his cheek and chin. You shifted him a bit and hit the other side of his face with the third shot making sure every inch of him was well glazed and sticky. Finally, you plugged up his mouth and gave him the fourth and fifth shots directly.

When you pulled back, he held his mouth open so you could see your sperm filling it. It was almost enough to overflow. Then he swallowed it all and opened it back up so you could see his clean mouth ready for more. You got down on your own knees to get up close to him and ran your hands over his face. You didn't care that you were getting your own cum all over your hands. You made sure to spread it all out like it was body wash. You slicked his hair back with it, spread it over his neck and down on to his chest. Only then did you hold your hands out before his face so he could lick them clean.

Now the scent of your cum was all over him. That mouthwatering omega scent was still there of course but it would be weeks before any alpha would fail to catch your heavy musk along with it. He was marked well and properly. No one would ever question that he was your omega.

That presented an issue though. Your father and mother would hardly fail to notice this claim. They might not question that you could turn whoever you wanted into an omega since it was a rule, but they might not be so happy about such blatant family ****. You could change that though, a few more rules and you could make it perfectly natural for you to keep an omega sibling as a fuck toy or even a proper mate.

Alternatively, you could go back to being a beta and make John back into an alpha. There was no way he would ever mess with you again, so you had nothing to fear. Plus, that scent mark wouldn't go away just because John was an alpha, no one would suspect that a beta had marked him, no matter what he claimed. But everyone would know that some other alpha had made him their bitch. It would be the ultimate embarrassment, and while such a mark would keep an omega safe, it would paint a target on an alpha. Any of John’s supposed alpha friends who scented such a mark on him would know that he had been bitched and could easily be taken again by any alpha that wanted him. He might well be begging you to turn him back into an omega to keep him safe in a few days.