
Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/4596048.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Marvel_Cinematic_Universe, Iron_Man_-_All_Media_Types, Spider-Man_-_All
      Media_Types, The_Amazing_Spider-Man_(Movies_-_Webb), Iron_Man_(Movies)
  Relationship:
      Peter_Parker/Tony_Stark
  Character:
      Peter_Parker, Tony_Stark, Harry_Osborn
  Additional Tags:
      Porn, Plot_What_Plot/Porn_Without_Plot, Incest, Alpha/Beta/Omega
      Dynamics, Mating_Cycles/In_Heat, Knotting, Tony_Stark_Has_A_Heart,
      Bathroom_Sex
  Series:
      Part 1 of The_Kind_of_Crazy_I_Like
  Stats:
      Published: 2015-08-17 Words: 3199
****** Gonna Have To Lock Me Up Before Too Long ******
by CalamityRondo
Summary
     Peter desperately wishes to be beta, but as luck would have it he
     presents as omega a week after his fifteenth birthday. And his first
     heat isn't a long time coming. Fortunately, his father, Tony, cares
     for him in a very loving way.
Notes
     This has been sitting unfinished on my hard drive for quite some
     time. So now, I finally decided to finish it and post it. Tony/Peter
     is far too underappreciated! So, if anyone wants to make my day, just
     write some Tony/Peter fic. They're absolutely the best!
     I hope you all enjoy reading this just as much as I enjoyed writing
     it! :)
Peter knows as soon as he wakes a week after his fifteenth birthday. There is a
low fire in his gut and a squishy wetness between his legs and Peter just knows
he is an omega. And apparently, he is about to go into his very first heat.
"Oh, no no no no", he curses. He jumps from his bed, yanking his underwear
down, and wipes between his legs with the cloth. But a drop of slick appears
anew after just a few seconds. Peter groans. He doesn't want to be omega.
He doesn't want to be an alpha, either. Peter actually doesn't care at all for
classifications, doesn't get why people bully others for a physical
constitution they cannot chose or change. Peter doesn't care for being at the
top of social gatherings by being alpha just as much as he doesn't care for
being 'in the lowest caste' if he should be omega. Which he now is.
Peter has always hoped to be beta for one simple reason: Hormones have the
weakest control over them. What Peter does care for are his studies, his work
with his dad, his racing thoughts about their newest project. If he were to be
beta, he would have the lowest chance of being distracted from those things. He
knows the way hormones can hold control over your life, sees it every now and
again in his alpha dad. Tony doesn't get into ruts often, but when he does, it
lasts for days in which he is not able to think clearly at all. It's Peter who
has to tend to him in that time, and Peter doesn't mind, he would do anything
for his dad, but since both are occupied with Tony's hormones, neither of them
gets any work done. It's frustrating.
And now, Peter is in for incoherency for a full week every so often. There is
no proven standard for heat frequency, some omegas get it every month, some
only once a year. Peter hopes he will be the latter.
Of course, he could get suppressants and never worry about his hormone induced
stupor again, but he has learned in Sex Ed about the potential risks of
prolonged use. Suppressants can damage your brain. It's a risk Peter is not
willing to take, just like Tony.
He groans again, feels the fire slowly spreading to his limbs. His cock his
hard and a new glob of slick runs down his legs. Peter wants to throw himself
on his bed, rut against the mattress and fuck himself on his fingers, but he
knows as soon as he gives in he will be mentally gone for a week. He is still
somewhat coherent, the heat only slowly building, so he has to take
preparations now.
He rids himself of his shirt because it's starting to get too hot. And he finds
his phone and dials Harry's number. Harry hasn't awakened to his biological
role yet, so he will be able to approach Peter safely. He tells him to bring
water and nutrition. Talking gets harder, he stumbles over the words and has to
constantly lick his dry lips. Even Harry's naturally lighter voice sends sparks
of arousal down Peter's spine. His friend his concerned, but Peter shushes him.
He may have only seconds left and there is still something he needs to get out.
"Bring me one of those...", it's embarrassing to say it even in his beginning
heat daze, "toys with a knot." He can't hold back the moan on that last word.
He has never had any particular fantasies about knots, but now it gets him
going like nothing else. Like it's the one goal he has in life. His head is
starting to swim.
Not waiting for Harry's reply – or maybe he has already answered but Peter was
too preoccupied with his needs – he ends the call. His legs are turning to
jelly, so he has to act quickly. With a strength he doesn't know where he
musters it from he drags himself to the bathroom and into the large bathtub
that Tony has insisted on having. He lays there for a few minutes, panting
hard, before he remembers he has meant to let cold water in the tub.
The water slowly crawling up his already way too hot body is heaven. It cools
him down a bit, enough even to not let him succumb to craziness entirely. It's
still agony, though. A spot deep inside him – were he sober he would simply
call it his ass – longs to be filled. It costs every bit of willpower he has
left to not stuff his own fingers in there. Before Harry arrives with his
requested toy, he won't pleasure himself lest he makes the need even worse.
Although that is a thought that gets steadily more difficult to hold on to.
His hole spasms and slick mixes with the water just like his precome does. It's
kind of disgusting. But Peter has to drain and refill the tube after some time
anyway, because his body turns the water warm quite quickly. He longs for bags
and bags of ice cubes but there hasn't been enough time to asks Harry for even
more.
There are pictures in his head of him being mounted like an animal. Normally,
his ears would burn crimson at those thoughts but now Peter just moans
helplessly and tries to cling to the phantom pleasure.
"Pete?" A quiver rakes Peter's body, his hole clenching and unclenching
violently, sending more and more slick into the water. That is not Harry's
voice, it's his dad's. Peter can't remember Tony's voice being that deep, it
probably isn't. It's just his sex crazed mind but Peter can't do anything
except react with his whole body to the only alpha in the house.
Before he can open his mouth to send Tony away, his father just barges right in
in his I-don't-care-for-privacy attitude.
"Pete, is everything–" That he even begins to ask that question shows that
lying underwater covers Peter's scent more than he has imagined. Peter looks at
him, sees his nostrils flare and realization light up behind his eyes. He
moans, his dad is a fucking turn-on. His scent his everywhere, creeping inside
of Peter, lighting him up from inside. It only gets thicker with every step
Tony takes towards him. Peter holds up a hand.
"Dad..." He means to tell him to go away, but it comes out as a helpless sob.
Peter is frustrated, he has no control over himself, and the only thing he can
think about his how he wishes his dad would join him in the tub, join their
bodies. Another sob escapes him, because he is terribly needy.
"Shh, it's okay, Peter", Tony offers. His face is full of worry and sympathy, a
sight reserved only for his son. Peter can see sobriety in his eyes which means
he hasn't triggered Tony's rut. It's a small relief. But then, it gets even
more confusing when Tony begins stripping. Peter wonders if he has missed an
explanation on Tony's part or if his mind is now so muddled that he just
doesn't get his dad's actions any more.
"–you doing?" he tries to asks but more moans than actual words make it out of
his mouth. Tony is opening his pants but stills. He reaches out and strokes
once over Peter's hair. Peter automatically leans into the touch and whimpers.
"It gets easier after your first time, trust me." Peter nods. What Tony says
makes no sense and every sense at the same time. But he knows that he can't
stand the pressure inside him any longer. So if Tony offers something to
relieve him, he is more than welcome.
The water swishes around him when Tony climbs into the tub. He gets on his
knees between Peter's legs. His thighs brush lightly against Peter's calves but
Peter surges even into that small a contact. His upper body shoots upwards
before Tony's hands can steady him. Every touch is making Peter yearn for more.
"Easy there", Tony says and laughs a little. He presses a kiss to Peter's
forehead before he gently lowers him into the water again. Peter's hands have
come to grip Tony's arms and he pulls him along.
"Dad, this is awful", he whines in a second of mental clarity.
"I know", Tony whispers against his temple. "But it'll pass, I promise." He
kisses his way down the right side of Peter's face just like his hands travel
down Peter's body. One stops at his nipple, gently rubbing, while the other
dips slowly lower, caressing his stomach and hips. Peter's eyes roll into his
head, a string of pants and moans and the word 'dad' leaving his mouth before
Tony covers it with his own. The scratch of his beard is nice although it hurts
a little. Tony's lips and his tongue distract him for some moments. Tony is
terribly experienced in such things and Peter can't keep up. He tries to
reciprocate, but he ends up fisting Tony's hair and just taking it.
His lower body reminds him that it wants attention as well with a deep ache
that actually hurts and Peter whines low in his throat against Tony's lips. His
father gets the message apparently seeing as the hand that has been rubbing
over his hip bone trails lower, not managing to dodge Peter's dick entirely at
which Peter moans wantonly, and finally arrives at Peter's hole. A finger
presses against his entrance and Peter presses right back against it. It slips
in without resistance and Peter breathes heavily into Tony's mouth. Finally,
there is something filling him. Tony's finger is perfect, and yet there is room
for so much more.
He wriggles, trying to push himself further onto the finger, getting it deeper,
but it's already in to the last inch. Before Peter can whine again, though, a
second finger presses in right next to the first one. It's better. He feels
fuller, but he still clenches down on the digits, wishing they would fill him
up even more.
Tony lifts his head, looking at Peter and he stares back unfocused. His body is
still burning, the water around them having already heated up considerably, and
relief is nowhere near. Holding his hands up where they are wrapped around
Tony's neck is getting difficult, so he lets them slip down, scratches them
down over Tony's chest, trying to convey his needs he can no longer voice.
Stopping for a second kissing his son, Tony rubs his cheek against Peter's,
chuckles and whispers in his ear. "You're hot like this, Pete. Which is not
surprising what with the same DNA as me and everything." He adds the second
sentence like an afterthought. "Anyway, next time I'm gonna enjoy that sight a
little longer. Foreplay is quite important. Well, sometimes it is. But we
wouldn't want to keep you waiting now, don't we?"
Peter just nods. He hasn't heard a word Tony has said except for 'hot' and
maybe 'enjoy'. He runs his hands weakly over Tony's chiseled chest and abdomen.
Any other day, touching his father like that would have made Peter burst in a
shower of embarrassment, but now feeling Tony's skin so close to his own is the
only thing keeping him remotely sane. Tony is still only fucking him with his
fingers, though, which is just not acceptable. So Peter's hand slides slower
until he can wrap it firmly around Tony's impressive cock. Tony is not exactly
alpha standard what with his slightly short build but his cock more than makes
up for it. Peter can feel saliva pooling in his mouth just from touching it.
It's thick and heavy, the bulge of his knot just barely there.
He revels in the sounds Tony makes as he strokes him. Up and down, up and down.
But it's difficult. It's oh so difficult for Peter to keep doing that, so he
rubs his cheek against Tony until the older man looks at him. Hazy eyes try to
focus on Tony and with all the coherency he has left, Peter grounds out "Dad,
please."
Tony nods soberly, but the only thing he does is wriggle another finger inside
his son. Peter squirms. "No...", he mumbles.
Kisses are being peppered over his face. "It's better this way. Two is not
enough. It would hurt you."
"It hurts now." Peter feels like a petulant child, but he doesn't care. He
throws his head back and moans, hoping he can just turn on Tony enough ton
finally fuck him. But Tony stays true to his words, and it's minutes of getting
finger fucked before the older man finally decides it's enough.
Peter still whines, when Tony pulls back his fingers. Because being completely
empty is worse than being only filled with the other's digits. Tony shushes him
with soothing kisses. "You'll feel better after this, promise", he whispers
against Peter's lips. And then finally Peter can feel Tony's cock nudge against
his entrance. The girth stretches him farther than he has been before, and even
despite all the slick and the water the feeling is a little uncomfortable. But
it's breathtaking at the same time.
Being too exhausted to push down against his father, Peter tries his best to
relax and let Tony in. And it's wonderful. After the initial unease has gone,
the stretch just feels so right and Peter squeezes down on the hot, heavy flesh
inside of him. That makes Tony groan in pleasure and push in just a little
faster. When Tony is in to the last inch, Peter feels impaled on his giant
dick. Like it might split him in two. It's the best feeling in the world.
Peter's eyes droop and for a moment it's enough to simply enjoy the way his
inner walls are being stretched to their limit. Tony's voice is what pulls him
back into the present.
"You're gonna love this part even more", Tony whispers in his ear. His voice is
husky and has dropped at least one octave, a clear sign of how aroused he is by
Peter, though his son can pay those signs no mind. He just grounds out "Fuck
me, please."
"I was going to", Tony replies a bit put off. But since Peter can in no way
return his quips, he just starts sliding out of the boy's hole slowly before
pushing back in. Peter moans, his eyes blissfully closed. It's a sight Tony
wants to imprint into his brain.
It's a rather slow dragging motion Tony has going, but Peter finds himself able
to actually enjoy it. Since there is a cock stuffed deep inside of him, he is
able to think a little more clearly now. Sex is still the only thing he can
think about, but coming isn't so urgent anymore. He could go on like this. He
knows it should be the other way around, the joining should be making him even
more dazed. Peter likes to feel a little more like himself during this thing,
though.
His legs warp around the back of Tony's legs and his arms snake around his
torso. He kinda feels like hanging onto Tony, but his father doesn't seem to
mind. He just pushes in and out of Peter, all the while lowly moaning. The
beginning swelling of his knot catches on Peter's rim. It rips a sound of both
surprise and appreciation out of Peter and just like that Tony's thrusts speed
up.
They look into each others' eyes. Peter knows Tony must find evident traces of
his heat there, but he can't really place the sparkling in Tony's eyes. It's
not the beginning of his rut, but something akin to that. Tony leans down,
stopping just short of his lips. His voice is hoarse when he whispers.
"You're my greatest achievement, Pete."
He presses his lips to Peter's, his hands grabbing hold of his son's slim hips,
and starts a more earnest pace. They moan into each others' wet mouths. Peter
feels his heart beating wildly, his hole clenches and unclenches
uncontrollably, and he just moans 'dad' over and over again.
Water splashes over the brinks of the tube. Peter has lost every sense of
direction, his world being reduced to the feeling of Tony above and inside of
him. Peter wants this feeling to stay, he wants to wrap himself in Tony's arms
and never leave.
Tony's cock brushes against his prostate repeatedly and Peter knows he is a
goner. But then there's a hand wrapping itself around Peter's dick, stroking
it, not quite in the same rhythm as the thrusts but still undeniably good.
Peter's head begins to swim from all the pleasure. His fingers dig into Tony's
back and he almost sobs, because he can't come until Tony's fully erect knot is
buried deep inside him.
Tony can still go on. It comes from all his experience with sex. Peter curses
inwardly.
"It's gonna be so much fun when I hit my rut", Tony breathes against Peter's
lips, and it seems to be his own words that send him over the edge. Peter feels
his already quite large knot being pushed against his rim, feels it entering
him, and he thinks he cries out when it's finally inside. It expands even
further, stretches him until Peter is sure it's gonna rip him open, and Tony
comes in thick, hot spurs. Tony's hand doesn't stopping tugging his member.
That combined with the feeling of Tony's semen shooting into his very core has
Peter finally reach completion, too. He cries out in relief and shoots his come
all over Tony and himself.
They lie there panting for some time. Peter revels in the moment until a voice
from outside the bathroom door calls out to them.
"Are you finished already? If I have to listen to you guys for another second,
I'm definitely going to be sick!"
Harry's voice abruptly pulls Peter out of his heat high. He takes in his
surroundings: the drenched bathroom floor, the icky water in the tube, his own
disheveled state and the disheveled state of his father. Panic rises in him and
he tries to get up, but Tony stills him immediately.
"Where do you think you're going?", he asks accusingly. "You could have ripped
it off!"
Peter looks at him incredulous. "THAT's what your concerned about?!"
Before Tony can answer, Harry's voice calls through the door again. "Oh my god,
please don't make a scene now, Pete."
Tony grins and nods. "You heard the boy. Besides, you can't go anywhere since
you're... you know, stuck to me."
Peter colors at those words. "B-but Dad...", he stammers.
"Shut up, Pete!", Harry cries. "Everyone has been waiting for you two to do it,
anyway! Gwen and I even placed bets how long it would take you to finally do
it. Not that I want to witness this EVER AGAIN. So... I don't suppose you still
need the toy you wanted me to bring?"
Before Peter can say anything to that, Tony grins. "Oh, I think he does!"
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