Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/4028713.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Dean_Winchester/Sam_Winchester
  Character:
      Dean_Winchester, Sam_Winchester, John_Winchester
  Additional Tags:
      Alpha/Omega, Alpha_Dean, Omega_Sam
  Stats:
      Published: 2015-05-28 Words: 2827
****** Just As He Thought ******
by Dragoneyedgirl990
Summary
     Dean Winchester was 18 years old and has long since proudly presented
     as an Alpha much to his fathers relief. John would never admit it but
     he had been worried for a little while that his oldest son would be
     an Omega, with his pretty looks and willingness to obey. He had no
     doubts that his younger son would present as an Alpha as well, Sam
     was hard headed and fought his father every step of the way.
     Definitely an Alpha.
Notes
     This is my first attempt at Fanfiction, and though I am open to
     constructive criticism, please be kind.
     This takes place pre-series, Dean is 18 and Sam is 14.
Dean Winchester was 18 years old and has long since proudly presented as an
Alpha much to his fathers relief. John would never admit it but he had been
worried for a little while that his oldest son would be an Omega, with his
pretty looks and willingness to obey. He had no doubts that his younger son
would present as an Alpha as well, Sam was hard headed and fought his father
every step of the way. Definitely an Alpha.
Dean had his own thoughts on his little brother, he had practically raised the
kid himself, and therefore had better insight than his father. Sure Sammy
fought back against John, but he never questioned Dean. He did everything his
brother asked of him, practically falling over himself to please Dean. Dean
hoped deep down that his little brother would be an Omega. Dean had always
protected and guided Sam and with him as an Omega it would cement that role.
One of Dean's biggest fears was that Sammy would leave if he was an Alpha.
Leave Dean. Dean couldn't handle that, didn't think he would survive if his
baby brother took off.
Sam had just turned 14, and still hadn't popped his knot. John said that he was
just a late bloomer, but the older Sam got the more worried John became, Dean
had presented at 12 same as John. Dean tried to hide his excitement, since it
seemed as if he was right and that Sam, his Sammy, would present Omega. Despite
the feelings of John and Dean, they went on as if everything was normal, and
for a while it was. They went out hunts, Sam and John butted heads as usual,
and Sam continued to try and please his big brother however he could.
One night, mid-hunt, things went south...
The hunt should have been quick and easy, one rogue Vampire versus three
Winchester men. The beast didn't stand a chance. The problem was Winchester men
didn't account for the young of the three to go into heat. Dean was standing
with Sam keeping an eye out while John snuck around behind the werewolf and
poisoned it with Dead Man's Blood. Every so often Dean would look to his left
and see his lanky little brother shifting nervously from foot to foot.
"You alright there Sammy?" Dean had to ask, noticing how pale his brother
looked, not sure if it was the moonlight or if something was really wrong.
"Dean I'm fine, you've asked me a million times already!" Sam snapped,
irritated not only by his brother's over protectiveness but also by being
called Sammy. No matter how much he told Dean he hated it, he still got called
by that name.
"No need to bite my head off Sammy, just making sure. You seem off." Dean
couldn't help but smirk when he called Sam by the name he knows he hates. He
didn't always do it on purpose, force of habit for the most part. Sam just
rolled his eyes, not bothering to answer his brother this time. He shifted
slightly, gripped his gun a little tighter and scanned the forest in front of
him. Both brothers snapped their heads to the west, hearing the sound of
snarling and running. Their father was driving the monster in their direction.
"Get ready Sammy, it sounds like its going to get ugly. " Dean kept his eyes in
the direction the monster was coming from, he couldn't afford to lose focus,
especially since it sounded like his father hadn't manage to poison the vampire
at all. That was until he heard the whimper of pain from his baby brother,
followed by the most heavenly scent to ever hit his nose. Dean turned with wide
eyes, to the sight of Sammy huddled on the ground making the most pitiful
sounds. Dean couldn't help but scent the air, even though he already knew what
was wrong. Baby Brother was in his first heat. All thoughts of the hunt were
forgotten, all Dean knew was that he had to get Sam to safety, and from the
look of pain on Sammy's face Dean was going to have to carry him. Just as Dean
scooped Sam's burning hot body into his arms, stifling his own grown as his
jean became impossibly tight, John and the vampire burst into view.
"Dean quick..." John's words died in his throat at the sight before him. His
oldest son cradling his youngest to his chest with the most feral look on his
face. John’s worries had come to fruition, his youngest presented Omega, and
worse in the middle of the hunt. The vampire had also froze and was taking the
view in, sniffing the air before zeroing in on the Omega. He stalked towards
the brothers, completely focused on his need to drain the blood of the creature
creating the wonderful scent. John used the distraction to quickly slice the
monster’s head off.
“Seriously?!? One of my sons is a breeding bitch?” John couldn’t contain his
rage at almost having the hunt be ruined and having an Omega son. Sam whimpered
even louder in pain and fear and buried himself into Dean’s chest. Dean snarled
and bared his teeth at his father. No one was going to speak to his Sammy like
that. Suddenly with that thought, the Alpha took over. Mine. Breed. Knot. Bite.
Mate. MINE. He had to get his Omega back to their room, thankfully he had taken
the Impala while his father had brought the truck. He was able to push the
Alpha down long enough to get them to the room, but that was all.
Sam didn’t know what hit him… the pain, the need, and the horrifying wetness
that was soaking through his pants. He couldn’t think of anything, he was
scared. Suddenly he was in Dean’s arms and the pain seemed to lessen just
enough for him to comprehend the world around him. HEAT. He finally realized
what was going on. He had presented as an Omega… his father was going to be so
angry. As if on cue, he heard his father almost roar in anger, calling him a
breeding bitch. Sam tried to curl himself up into Dean’s chest and hide. Dean
would protect him, Dean was his Alpha. Always had been and always would be. He
felt such comfort and a small bit of relief when his big brother snarled at
their father. These moments of lucidity were brief, the pain and need of the
heat took back over quickly.
The drive back to the room was hell, Dean pushed his baby as fast as he could.
Sam was curled in the passenger seat, moaning and rubbing himself anyway he
could, trying to bring relief. Dean tore his eyes from the road to glance at
his brother, taking in the sight, Sam soaked in his own sweat, heat rolling off
him in waves, fully erect in the confines of his jeans. All of this made Dean’s
dick that much harder. He shifted against the seat and gripped the wheel
harder, in an attempt to keep his hands to himself. He couldn’t quite control
the growl that emanated from his throat though, the scent of Sammy’s slick was
filling the car, so mouth wateringly delicious. He saw a flash of motion out of
the corner of his eye, and suddenly Sammy’s head was in his lap.
“Sammy, baby boy, what’re you doin’?” Dean managed to choke out. Baby brother
was currently nuzzling against his raging hard-on.
“Need you De, want you, want your knot. Want it so bad it hurts, need it so bad
it hurts.” Dean couldn’t believe the words coming from Sam’s mouth. He knew it
was the heat talking but still, this almost dirty talk falling from his
brother’s perfect pink lips was so hot. He couldn’t help it when his foot
slammed down a little harder on the gas pedal, causing Baby to groan in
protest. That didn’t matter right now though, he needed to get to the room and
help his baby brother, protect him from the pain, bring him relief. He lifted
one hand from the wheel and threaded it through Sam’s hair, stroking the silky
strands and pushing Sam’s face a little closer to his dick. Sam was completely
gone in the heat, rubbing against the seat for friction and mouthing at Dean
through his jeans.
“You smell so good Dean, especially right here.” Sam kissed and licked at the
fly of Dean’s jeans. His little mouth was so hot against the denim, soaking
into his throbbing dick, making it even harder if that was even possible. If
Sammy kept it up, Dean was going to pop his knot in the car, and that wouldn’t
help little brother at all. Thankfully it was only a few short minutes more
before they pulled up at the motel.
“C’mon baby boy, as soon as we get inside I’ll make you all better, take care
of you.” Make you mine. Dean thought the last part to himself, unsure if Sammy
would want him as a mate once the urgency of his heat wore off. Exiting the
car, Dean yanked Sam into his arms, darting his eyes around the parking lot,
checking for other Alphas that might be a threat. Seeing that the coast is
clear, he runs to the door of their room, thankful that they aren’t sharing
with their father. Once the door is open, he barrels through and tosses Sam
onto the bed, slamming the door and double checking that it's locked for good
measure. Slowly he turns back to face his brother on the bed, Sam is once again
writhing around trying to find some kind of relief.
“Baby boy, you are beautiful. Most gorgeous Omega I have ever seen.” Dean
couldn’t help the words, they just escaped without warning. He had always
thought Sam was beautiful, but in the throes of heat, his beauty was
intensified. His golden tan skin shone with sweat, and his hazel eyes were
almost invisible due to his pleasure blown pupils. He’d always loved and
protected Sam, didn’t even have to be told, and now he would take care of baby
brother in a way he had always secretly hoped for. At the sound of Dean’s
voice, Sam whined and flipped himself over onto his stomach, pushing his ass up
into the air.
“Please Dean, need you, need your knot.” Whining out the words, begging his big
brother to take care of him. Dean didn’t hesitate, he dove towards the bed,
flipping Sammy back over, and crushing their mouths together. They both groaned
at the feeling, neither being careful, clashing teeth. Dean licked into Sam’s
mouth, drowning himself in the sweet taste, compliant as always when it came to
Dean, Sammy opened his mouth and allowed the exploration. As amazing as the
kisses were, Dean knew they both needed more, that kissing wasn’t enough to
relieve the pain and need Sam was suffering through. Drawing his mouth away,
Sam whimpered from the loss of contact, but couldn’t fight back the moan as
Dean literally ripped his shirt off, and began to kiss and lick his way down
Sam’s neck and chest. Dean stopped at Sam’s nipples making sure to kiss bite
and lick each one into a hard little peak. The side effect of this being that
Sam made the most delicious noises. As much as he enjoyed the noises, Dean
continued his trip south moving over Sam’s stomach which is starting to develop
defined muscle due to all the training they endured. He stopped once he reached
the top of his jeans, where Sammy’s downy soft treasure trail was beginning to
grow in. Creating a map right to where Dean wanted his mouth. He locked eyes
with Sam, feeling his little brother buck his hips up as he unbuttoned his
jeans and pulled them and his boxers down in one movement. He couldn’t fight
back the growl the reverberated through his chest at the sight. Sammy was hard,
his dick bobbing up against his stomach and weeping precome. Little brother was
already a decent size at only 14 if he kept growing the way he was, he would be
a monster. He leaned down and licked from the base up to the tip, enjoying
Sam’s flavor, and the moans coming from his mouth. He stopped once again before
he got too carried away though, knowing that he’d pop in his jeans if he didn’t
get naked now. He stepped back from the bed where Sam was now panting and
writhing due to a loss of contact. Dean quickly lost his own shirt followed by
his boots,socks jeans and boxers. Once naked he stood for a minute over his
brother, letting him take in the sight of an Alpha. Dean was all muscle and
freckled skin, never as tan as Sam. He watched as Sam’s eyes traveled down his
body, widening when he saw the dark blonde trail leading to Dean’s Alpha cock.
All Alphas were well endowed, a sign of their virility and dominance. He saw
Sam’s mouth water and little brother tried to crawl towards him, but Dean put a
stop to it with a snarl. He climbed up on the bed and flipped Sammy onto his
stomach.
“Present Omega” Sam couldn’t fight the direct order given to him by his Alpha,
his brother, his Dean. He pressed his chest flat onto the bed, and lifted his
ass into the air. He could feel the slick run down his thighs readying his body
to take Dean in him. Dean scented the air, so thick and sweet with the smell of
Sam and his slick. He snarled again, wanting nothing more than to ram into
Sammy, but he stopped himself. He used his hands to pull Sammy wide open and
licked up and over his rim, revelling in the taste. It was so utterly Sam, all
sunshine and honey with woodsy undertones. Using the slick that was sliding
out, Dean coated his finger and slowly pushed into Sam, pumping a few times
enjoying the mewling noises coming from baby brother. Once the first finger
slid in and out easily, Dean added a second and then a third finger, pumping
and twisting before hitting Sam’s prostate dead on. Sam began to rut against
the bed trying to seek more relief,while begging Dean for more.
“Please Dean, Alpha. Knot me. Breed me. Mate me.” Dean was shocked at the last
part. He knew that Sam would want to be knotted and bred, but he didn’t know he
would want Dean as his mate.
“Baby boy…” Dean growled out, as he placed the head of his dick against Sam’s
rim.
“Mine.” With that word, Dean pushed the head in. Sammy howled in pleasure,
finally feeling like he was being filled. He worked his way in slowly until his
balls were flush against his brothers ass. Letting Sam adjust before he began
to thrust.
“Fuck. Knot. Breed. Mate. Mine.” Each word accentuated by a thrust that hit
Sam’s prostate dead on. Dean began to work himself into a frenzy, the Alpha
taking over. Sam could feel the change, scented the air, and then gave in
completely to the heat and his Omega within. He began meeting every one of his
brother’s thrusts, wanting his brother as deep inside him as possible.
Before too long, Dean was about to fall over the edge. But as the Alpha he
needed to make sure his beautiful Omega was taken care of, he reached around
and wrapped his strong fingers around Sammy’s dick. He stroked hard and fast,
bringing his brother to meet him at the brink
“You ready baby boy? Ready for my knot?” Dean knew he didn’t need to ask, but
felt compelled to after years of taking care of Sammy.
“
Please De, please. Im ready,make me yours, give me your knot.” Sam panted the
words out, struggling due to the rush of pleasure at Dean’s pet name. It made
him feel loved and cherished and safe.
With one last snap of his hips, Dean pushed his knot inside Sam, which tipped
him over the edge and Sammy as well. With his last conscious thought before
being taken over by the pleasure of his orgasm Dean sank his teeth into the
spot where Sammy’s neck met his shoulder. Marking his mate forever. They both
blacked out due to the intensity of the bonding and their orgasms shortly
after.
A few hours later Dean woke up still locked to Sammy by his knot. Baby brother
was still out cold, and Dean looked down on him with a fond smile on his face.
Running his hand over his brothers swollen stomach, full of his come and
hopefully his pups, he whispered:
“Just as I thought, always knew you’d be an Omega. My Omega. My Mate.”
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!