Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/5152022.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Gravity_Falls
  Relationship:
      Dipper_Pines/The_Author_|_Original_Stanford_Pines
  Character:
      Dipper_Pines, Mabel_Pines, The_Author_|_Original_Stanford_Pines, Grunkle
      Stan_|_Stanley_"Stanford"_Pines, Jesus_"Soos"_Alzamirano_Ramirez
  Additional Tags:
      Uncle/Nephew_Incest, Alpha/Beta/Omega_Dynamics, Omega_Dipper, Alpha
      Stanford, Age_Difference, Anal_Sex, Light_Angst
  Stats:
      Published: 2015-11-05 Words: 4069
****** Love is a chemical ******
by eggplantsins_(alchemist17)
Summary
     Dipper unexpectedly goes into heat. Gravity Falls is too backwards to
     stock suppressants. Ford is weak.
     Guys I'm finally working properly on a sequel. It's dipper/stan/ford.
     I have like a paragraph for stan/mabel but I struggle with female
     anatomy so??? In any case hope to see you soon with more incest 27/
     03/17
     I'm posting it now golly gosh
Notes
See the end of the work for notes
Dipper had been fidgety throughout dinner, restless during the night, and was
unusually sweaty at breakfast. No-one paid much attention until Ford came up
for breakfast.
He glanced at Stan. Stan seemed as calm as usual as he added sprinkles to
pancake batter for Mabel.
Ford sidled up to him. "Can you not smell that?"
"Whaddya do, roast an alien?"
"The boy."
"Dipper? I expect he smells like sweat as usual."
Shaking his head, Ford pulled his twin away from the stove and into the hall.
“What’s wrong with you? Dipper is going into heat and you’re making pancakes!”
“Hold on a sec.” Stan leaned into the kitchen. “String bean, finish the
pancakes for your grunkle, would ya?”
“I’m gonna put some more sprinkles in!”
“Alright, sugar pie. Now what’s this about Dipper?” Taking off his glasses,
Stan attempted to busy himself cleaning them on his shirt.
“Dipper is going into heat. Has he taken suppressants?” Ford adjusted his
glasses. “I guess I could make-”
“No-one is consuming anything from the basement, okay? I bet you still burn
toast."
"I do not."
"What, cause you don't make toast?"
"Look, I'll go into town to get some suppressants. I believe they're quite
widely available these days." Ford grabbed his coat from the stand.
"Not going to have breakfast first? Mabel will give you extra sprinkles."
"The pancakes are already 80% sprinkles. And no, there simply isn't time."


Tiptoeing to reach the stove, Mabel finally deemed it to be pretty enough to
eat.
"You don't look so good, Dippersaurus. You want some Mabel juice?"
Dipper pushed his fringe back, not caring that it exposed his birthmark.
Mabel, that stuff is in no way medicinal."
"You haven't even tried any." The pancake flopped onto the plate.
"Just because confetti is biodegradable doesn't mean it's edible."
"Come on Dip, aren't you meant to be all about the mystery?"
"I am not drinking confetti." He said firmly, taking a bite of his pancake.
"No, but you're eating it."
"Mabel-"
The front door slammed shut. Stan shuffled back in, blindly reaching for his
coffee mug.
“Have you guys had the talk? You know, alphas, betas, omegas.” The twins
nodded. “Dipper is going into heat. Ford has gone to get suppressants from
town.”
Dipper looked at his pancake. “Oh.”
“No need to worry, Ford won’t be long.”
"No, that's fine."
"Disappointed, huh?" Stan poured more pancake mix into the pan, waiting as
Mabel added sprinkles.
"It's just it's...inconvenient."
"You'll manage it Dip. You've been possessed by a demon and look at you now!
Still walking around and stuff." Mabel enthused.
“Yeah, yeah, I just need to remember to take the suppressants and put on extra
deodorant and I have to practice telling my friends.” He poked at his confetti
pancake. “Grunkle Stan, can I get a different pancake?”
Mabel rolled her eyes. “Biodegradable is totally the same as edible.”
 
Ford returned shortly after they finished breakfast. He glanced into the
kitchen briefly, motioning for Stan to follow him into the hall.
“Even in this day and age Gravity Falls is too backwards to carry
suppressants.”
“Oh.”
“Oh indeed.”
“Well, I guess I’ll head to the town one over and grab some. I’ll take Soos for
the ride, he likes the video game store there.” Stan started to make his way up
the stairs.
“What about Dipper? Will he be safe? And Mabel?” Ford asked, his foot on the
bottom stair as though he meant to follow Stan.
Without turning around, Stan replied. “I’ll put Dipper in his room. Mabel can
bring him food and water. And thanks to Dipper’s obsession with your journals
he raised the dead. Soos and I made the shack zombie proof.”
“Zombie proof?”
“Grunkle Ford! Come have some pancakes.” Mabel bounded out from the kitchen to
grab his arm. “I made some with minimal sprinkles for you.”
 
Dipper was still chewing his pancake. He reached for his glass of juice and
downed it. “Mabel, can I get more juice?”
“You’ve drunk it all. All that’s left is Mabel juice.” Mabel flopped a pancake
onto a plate for Ford.
Visibly on edge, Ford seated himself. It had been years since he’d smelt omega.
They didn’t exist beyond the portal and he never ventured into town. The last
he’d smelt was Fiddleford, before he’d been turned mad. He wondered if he had
anything in his pockets that he could shove up his nose.
“Okay. Okay then. I’ll just go upstairs.” Dipper scooted his chair back. “Uh,
Mabel-” A tea towel landed on his head. “Thank you.” He pressed the tea towel
to his crotch and scurried from the room.
“Are you anywhere near to presenting, Mabel?” Ford asked, in what was hopefully
a level tone.
“Shouldn’t be. No-one in our year has, and Dipper took us by surprise. But
twins are normally the same, right? I mean, you and Grunkle Stan are both
alphas.” Mabel finally sat down for her own breakfast.
Deftly twirling his fork, Ford prodded at his pancake. It did have sprinkles,
but certainly less than Mabel's.
 
In the basement, he thought he was going insane. Dipper’s smell had seeped into
his nose, gotten into his mouth, his hair. Even his coat smelled like Dipper.
He paced his lab. He concocted foul chemicals. He made pungent scents.
But nothing worked. Ford looked up at the ceiling,unconsciously rising to his
toes to try and get closer to the scent.
He looked towards the hidden tunnel that led to the surface.
Surely getting a little closer could do no harm.
 
Twenty minutes later, Ford had climbed the shack and snuck in through a window.
He pressed himself against the attic door, face to the smooth wood. Dipper was
so close now, his scent so strong and Ford could feel himself start to salivate
as he slid a hand past his waistband.
"Great Uncle Ford?"
He jumped and hit his head on the doorknob. Cursing, he scrambled upright.
"Dipper! I just thought I'd see if you maybe needed anything, if I could do
anything for you."
"I thought you were going to stay in the basement while Stan was out." Dipper
shifted his weight, tugging at the front of his shirt.
"Yes I did tell Stan I would stay in the basement." He pulled at the sides of
his coat, doing his best to cover his erection.
Dipper took a step towards him. His eyes flicked up briefly but dropped to
below Ford’s belt again.
“I-I should just go back downstairs.” He swallowed.
Dipper’s eyes followed the movement.  Then he swallowed as well, head tipped
back to expose his throat. “You don’t have to go downstairs yet. Is there maybe
something I could help with? I think you’re pretty caught up with movies and
such but…” Dipper pushed back his hair.
“Oh, I had been meaning to ask you about those Lannister twins-”
“Dipper, I’m coming upstairs, okay?” Mabel shouted.
With a curse, Dipper hurriedly threw the attic door open and pushed his great
uncle inside. He slammed the door shut behind them as Mabel arrived at the top
of the stairs. They stood frozen as she ran past the door.
“Just needed some of that alien adhesive for bedazzling a suit for Waddles.”
"Is it safe for the adhesive to be that close to Waddles?" Dipper asked,
looking up at Ford.
Ford didn't reply. He was staring down at him, a hand slowly reaching for his
face.
"Ford?"
He seemed to remember himself, hand retreating and fingers curling in.
"If you're going to kiss me, at least kneel down. Or pick me up."
For a minute he thought Ford was going to go back to the basement, build
another portal and spend the next thirty years on the other side. Instead Ford
picked him up. He kissed the boy, chuckling when Dipper started to rub himself
excitedly against his stomach.
"Waddles will be fine. The glue is harmless once dry." Ford said.
One hand on Dipper's rear to hold him, the other tipped back his head to lay
bare the line of his throat. Ford murmured something to himself, hoisting the
boy higher to fix his lips to the skin.
"Ford..." He sighed, fingers easily lost in grey hair.
"What do you want from me, boy?" Ford asked, the hand holding Dipper pressing
him closer to his body.
"Your hands."
"What do you want me to do with them?"
Dipper huffed in irritation. He didn't answer, instead pulling his uncle back
down to his neck.
"Answer me, Dipper."
He arched his back, rutting against the soft wool of Ford's turtleneck.
"Dipper."
His cheek rubbed over Ford's stubble.
"Dipper!" Ford held him away from his body. “What do you want me to do with my
hands?”
Dipper’s flush vanished below his neckline. “I want you to-could you-”
“Shh, kid. Take your time.”
Smiling shyly, Dipper bent to nuzzle at Ford's neck. “Could you put your hand
down my shorts?”
“I can do that.” Ford murmured.
Against Dipper's sweaty skin his fingers were cool. He held Dipper tightly to
his chest, sliding a hand beneath the damp fabric. “What would you like me to
do now?”
“Put your fingers in me. I need you to put your fingers in me.”
Ford kissed him. The kid squirmed excitedly, mouth falling open easily under
Ford's.
When a thick finger finally slid into him he shuddered, legs pressing close to
Ford's sides as he came.
“Amazing.” Ford sighed over his jaw, burying his face in the crook of his neck
where the scent was strongest.
However Dipper was still hard, his noises pathetic as he tried to push back
onto Ford's finger.
“Not enough, huh?”
Dipper scowled at him. Unable to resist, Ford kissed him.
“Don’t worry. I’ve read enough books to know how to handle an omega.” He
lowered Dipper to the ground, waiting until the boy gained his footing before
letting go.
Dipper pouted, and was about to complain when Ford pulled his turtleneck over
his head.
“Thought we were going to keep our clothes on?”
Dipper laughed nervously. “I guess not.” He took his hat off and placed it on
the bedpost, patting down his fringe to try and cover his birthmark. Dropping
the rest of his clothes on the floor, Dipper stood with his hands clasped over
his crotch.
“Aw, let me see.”
“Nu-uh.” Dipper shook his head. He inclined his head meaningfully at Ford.
You’re as stubborn as Stanley.” Ford sighed but pulled off his undershirt. By
the time he kicked his underwear into the pile with Dipper’s clothes the boy
was flushed down to his thighs.
“Now, let me see you.”
Dipper raised his hands to his chest, fidgeting and chewing his lip. Taking a
step forward, Ford crouched down. He pushed back the hair from Dipper’s
forehead, leaning in to kiss the points of the Big Dipper.
“Let’s have a look at the little dipper.”
“Aw Ford, don’t call it that.”
“Maybe in a few years it’ll be the Big Dipper.” Ford cupped his face, making
his nephew look him in the eye. “Are you sure about this? We don’t have to go
any further, I can go back downstairs and then Stan will be back in a couple
hours.”
Dipper kissed him. He stepped between Ford’s thighs, wrapping his arms around
his shoulders. His hands didn’t meet in the middle. Ford raised his head to
break the kiss but Dipper simply moved to his jaw instead.
“Words, Dipper. I need you to say yes.”
“Yes, Ford. Yes.”
Ford grinned. “On the bed then.”
He obeyed, looking back at Ford as he laid down. Ford approached the bed,
fingers trailing over the curve of Dipper’s spine. Climbing onto the bed, he
placed a kiss on the back of Dipper’s neck before stretching out over him.
“Let me just make sure you’re ready.” Ford said, reaching a hand down between
them.
After only a few hours off heat Dipper was dripping and his fingers slid in
easily.
“Wow, Dipper. I wonder if I could fit all my fingers in.” Swayed by his
curiosity, Ford started to press a fourth finger in.
“Ford, now is not the time.”
“Of course, of course.” He stroked himself, spreading the slick over his
length. Ford lowered a little of his weight onto Dipper, just enough to keep
him still.
“Fuck, Ford, just put it in me already.” Dipper could feel it along his crack,
hotter than even his fevered skin. “It hurts, Ford. You want to make it better,
don’t you?”
Ford’s breath was cool against his skin as he maneuvered the boy. One hand
wrapped around his wrists, the other under his chest to hold him close.
“Great Uncle Ford, please.”
With a growl, Ford finally pushed in. Dipper shivered and immobile as he was he
tried to push himself back against his mate.
“Is that better? Or do you need more?”
Dipper was squirming, trying to dig his knees into the mattress to gain
leverage.
“All you have to do is ask.”
"Please."
"Please, who?" Ford asked. He knew to was cruel to keep Dipper waiting,
especially in this state, but he was sick and he knew it and he wanted it said
one more time. Once more when he had the kid desperate.
"Please fuck me, Great Uncle Ford."
Cursing, Ford gripped his wrists harder as he started to roll his hips. He was
dripping wet, each thrust sending slick oozing out over Ford. On a normal day
both would have cringed at the sounds but Ford's ears were full of the sounds
the omega made. His omega.
He bent down, flattening his tongue over the juncture of Dipper's neck and
shoulder, salivating as he opened his mouth to bite.
Dipper whined. It was high pitched and startled Ford. He mustn't bite Dipper,
mustn't shackle him like this. He pressed his nose between the boy’s wrists
instead. The smell was as intense at it had been earlier, but being buried
inside it’s source helped to alleviate the madness it caused.
"Dipper, I don't think it's going to fit." Ford said, worried. Already he'd
made his thrusts shallower as his knot started to swell.
"Make it fit."
"I don't want to hurt you."
"I need it." Dipper pleaded. "Just use your fingers."
"Dipper-"
"C'mon, it'll be an experiment."
Ford loathed to sit up, to pull away from the omega curled beneath him. But he
had to if he wanted to get his knot in Dipper. Pulling the boy up onto his
knees, he rubbed his fingers around Dipper’s hole, gathering up the slick that
had leaked out.
"I'll start with one, okay?"
He nodded. Ford sat back until only the head of his cock remained inside and
start to tease the rim with his finger. Slowly, he pushed forward, spreading
Dipper wider.
"That's good, Ford."
"Heh. You’re too kind. Stan was always better in bed than I."
Dipper lifted his head to look back at him, his face flushed.
"You like the sound of that, huh?" He tugged gently until he could fit another
finger in. "It's a twin thing. Or it used to be, since Mabel isn't here to help
you out." It was too soon to add another finger but Ford was too close to risk
messing around.
Dipper whined. His head was buried in his arms, back no doubt aching from the
curve of his spine.
“Stan was a champion in bed, just like he was in the ring. He was so strong, so
rough.” Ford reminisced. His own hold on the kid's hip was likely to bruise,
spanning from his spine to his belly button.
He was still thinking of his brother when he pushed a fourth finger in. Dipper
moaned as he came, a far deeper sound than Ford thought he could produce.
“Dipper?” He asked, his thumb stroking over the skin soothingly.
“Ford, you gotta-you gotta keep going.”
“Are you sure?”
“Yes.” Dipper sighed. “Please knot me, Great Uncle Ford.”
Ford looked down at him, awestruck. He pushed his little finger in, stretching
the kid as wide as he could around his fingers and cock.
The sounds Dipper made started to change, becoming more and more wrung out.
“Are you ready for it?” Ford asked, pulling his fingers free and wrapping
himself around the kid again.
Dipper nodded, unable to grasp the words. Ford pressed a kiss to his wrist, and
started to push. Dipper was still too tight but he pushed back desperately. He
scrambled for Ford's hand, his body as engulfing the knot at Ford's hand
covered his own.
With his knot firmly trapped, Ford's grip on his nephew tightened as he came.
He had just enough of his wits left to collapse onto his side.
 
When Dipper came to, he tried to sit up. Ford stirred behind him.
“Uh, Ford? Is-uh-that-going to go away any time soon?” Dipper asked, wiggling
his hips.
“Sorry kid. It’s gonna be an hour at least.”
“Foooooord, what if Mabel comes to check on me? She’ll be so mad that I didn’t
tell her I liked you.” He covered his face with his hands. “We cannot be caught
like this.”
“Dipper, wait-”
Dipper tried to pull himself off his great uncle’s knot. An arm wrapped around
his waist. He squirmed as he was pinned against Ford, fresh heat flooding into
him.
"Did-did you..."
Shuddering, Ford curled further around the omega. "Can't separate. Don't want
to hurt you."
“So we have to stay like this?”
“I’m afraid so. Take a nap.
 
The blacklight keychain revealed just how filthy the bedding was. Ford had
Dipper in his lap, held tightly to his chest as he looked over the kid’s
shoulder at the journal.
“You’ve done so well here, Dipper.”
“I just wanted to help the next kid who finds these.”
“That’s terribly noble of you.” Ford’s hands slid beneath his thighs, fingers
so widely spread they almost reached his knees.
“Ford, aren’t I meant to be the randy one here?”
“I just can’t help myself. You’re so precious.”
Dipper’s blush flowed down to his shoulders.
"Horny old bastard." He muttered as Ford lifted him. Pressing a kiss to his
hair, Ford gently lowered him again. Each movement pulled the knot flush
against Dipper’s rim, tugging until the omega clawed at his thighs and then
dropping him so the knot sat comfortably inside him again.
Moaning, Dipper dropped the blacklight. The light flooded over his chest, the
long streaks of dried come bright across his his chest. Ford craned his neck.
“Oh Dipper, look at your stomach.” Ford breathed, grabbing at the blacklight.
“I have to document this, I didn’t know it was possible.”
“Are you kidding me?” Dipper growled. Ford’s hand threaded through his hair to
push his head down. “Oh my God Ford.That is-that’s fucked up. Grab my phone. We
gotta get a picture of this.”
“What’s the passcode?”
“Year you were born.”
Ford easily held the large smartphone. He deftly typed in the code, propping
his head atop his nephew’s.
“Smile.” He said as he wrapped a hand around Dipper’s cock. Picture taken and
recorded for the sake of science, Ford focused fully on the teen’s glowing
stomach. His fingers spread, he pressed and felt Dipper squirm at the pressure.
“I think you’re going to run out of come soon.”
“Worry not. My body increases semen production when omega pheromones are
present.”
“Stop making science sexy.”
Ford dropped his head to nuzzle at the boy’s shoulder, stubble scraping against
the soft skin of his neck. He wanted to bite, to mark Dipper as his own. It
would be selfish to claim him, to keep one so young to himself.
“Just bite me. I want to stay with you, Ford, and if we’re mated they can’t
separate us.” Dipper panted.
He so desperately wanted to. Teeth bared, he scraped them over Dipper’s neck.
“It’ll hurt. I’m not sure how much.”
“I don’t care.” Dipper’s small hand reached back, pulling Ford’s face closer.
“I can’t wait to have a growth spurt.”
Ford already had his mouth open. He heard the words but his brain was slow and
by the time he understood his teeth were fixed in Dipper’s neck. The boy was so
young, not even fourteen and Ford had him pinned between his knot and his
teeth, so full of his seed his stomach was swollen. Skin broke, and Dipper came
as his uncle’s tongue pressed flat over the wound. The bond made, Ford’s orgasm
caught him unaware. He wrapped himself tighter around his mate, growling
softly. Dipper's head fell softly against his chest, the omega already asleep.
Falling back onto the bed, Ford laid a protective hand over the kid’s rounded
stomach.
 
Idly, Ford traced the ribs he could feel beneath the boy’s skin. The smaller
body rose and fell atop his body as Ford breathed. Even locked inside Dipper he
could feel himself growing hard again. He was sure he could move slowly enough,
quietly enough, that he could get himself off without waking Dipper.
He rolled over, laying Dipper on his side. All Dipper did was murmur sleepily,
nuzzling back against Ford. So tiny and delicate, Ford couldn’t help but curl
around him further. His big hand on Dipper’s stomach, he started to thrust.
Breathing in deeply, he held Dipper’s scent until he was forced to release it.
Deer fern, cedar wood, Indian patchouli. Dipper smelt like the forest he’d
spent so much time exploring. Ford closed his eyes, letting the pleasure
overcome his thoughts. His orgasm was gentle, his cock spurting weakly as his
body struggled to keep up semen production. Ford rolled onto his back, letting
the omega rest on his chest again.
 
Stan stepped out of the car, stretching after the long journey. The little bag
in his hand hardly seemed worth the drive, but Dipper needed it. Plus Soos was
delighted with his own tiny bag of purchases. They said goodbye, Soos wandering
to his own car. Mabel bounded up to him at the door, brandishing a saucepan of
food for their dinner. He ruffled her hair, handed her something small and
sparkly that had caught his eye and headed upstairs. Opening the door to the
attic, he dropped the bag.
His own twin, who he’d trusted with Dipper’s safety, wrapped possessively
around the boy. Dipper was asleep, clutching at the thick arm wrapped around
his chest. Ford hadn’t even noticed him.
Stan might have let it be until the kid’s heat was over, let him cope with it
in the natural way. Then Dipper stretched, head tipping back as he yawned. Stan
saw the bite.
“Ford! You piece of shit!”
Dipper, startled awake, attempted to roll off the bed. Ford grabbed him and
held him to his chest.
“What have you done? He's a child, Ford.”
“He needed me. He was in pain.” Grabbing his discarded turtleneck, he tucked it
around Dipper to keep him covered.
“You're the adult! You're supposed to resist, not cave and bite him.”
Dipper curled further against his uncle, nervous at the presence of the angry
alpha.
“Stan, you're scaring Dipper.”
Stan clenched his fists. “I can't believe you'd do this. I trusted you. I
trusted you.”
Dipper kept his eyes on the floor. “I asked him to, Stan.”
“Ford, the second this is over you can get out. Stay somewhere else for the
summer.” Stan slammed the attic door behind him.
Dipper clutched at his mate fearfully. “You're not really going to leave, are
you?”
“Hopefully not. At the moment Stan is confused, angry, and fairly envious.
He’ll have calmed down by the time your heat is over.”
Somewhat placated, he settled down again. “Wait, why would Stan be envious?”
“We’ll save that for another time, I think.”
 
“Dipper, my phone’s dead I’m going to text Candy on-you fucked Great Uncle
Ford?” Mabel stared at the screen.
Dipper snatched his phone back, hurriedly shoving it into his pocket.
“So that’s why I didn’t see you for three days! You got laaaaaaaaaaaid” She
punched him playfully in the arm. “You gotta tell me everything.”
“Aren’t you mad?” Dipper asked, his arms still raised defensively over his
chest.
“Nah. Well I’m mad cause you obviously had a crush on Great Uncle Ford and
didn’t tell me, but you’re not the only one crushing on a grunkle.”
End Notes
     Stan came round and let Ford stay, of course. He was just a little
     envious. Of who? Maybe both.
     Also Stan couldn't smell Dipper because his sense of smell is wrecked
     by years of smoking.
     Please tell me about weird typos and broken sentences it is too late
     to proofread.
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