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The Tunnel	By : PineWreths Category: +G through L > Gravity Falls Views: 9596 -:- Recommendations : 0 -:- Currently Reading : 1
Disclaimer: I do not own Gravity Falls, nor the characters from it. I do not make any money from the writing of this story.

Chapter List
- 1-The Tunnel
- 2-Part 2
- 3-Part 3
- 4-Part 4
- 5-Part 5
- 6-Part 6
- 7-Part 7
- 8-Part 8
- 9-Epilogue
- 1
- 2
“Come oooooon Dipper! Watermania awaits!”
Mabel’s pleading cry echoes up the hallway, and for at least the third time in the last five minutes Dipper looks down at his two-sizes-too-small, faded mustard-colored swim trunks, looks up at his reflection in the mirror, and sighs. She’s been anxious to go to the park for weeks now, and now he seriously regrets not tagging along with her last weekend when she tried to get him to tag along on a “Watermania shopapalooza” at the mall.
The contents of the trunks’ pockets lay emptied across the desk: Skipping rocks, a worn calculator, and of course a trio of chewed-on pencil nubs. His eyes are caught by a paper-mache book next to the pencils, the size of a matchbox. He smiles; It’s a tiny replica of Journal 3, the little number smudged from age and mushing up against his hands and the other pocket contents. Was it really two-no, three summers ago when they were last over there?
Dipper picks it up, turning it over and snorting out a smile as some of his sister’s trademark glitter detaches to infect his messy desk. He starts to brush at it before stopping, recognizing the futility of cleaning it while stacks of empty noodle cups and a hoard of flatware and dishes lie stacked precariously on old textbooks.
He stares at the little journal, still smiling absently, remembering Mabel’s broad grin and the hand-made tissue paper wrapping she had first presented it in; It was the Sunday comics, but she had pasted pictures of them over all of the heroes, and the newspaper’s mugshots of Gideon over more than a few of the monsters. He had loved it then, and loved the miniature Journal even more. “It wassupposed to be a little one you could actually open and write in, but I kinda derped with the glue and went a bit overboard,” she had said, her tone falling slightly before renewing with a triumphant “Now it’s a awesometastic keychain!”
His shoulders hunch forward a bit, and the smile fades. He had kept that wrapping paper, celebrating their official transition into the unknowable realm of Teenagerhood, and promised that he was going to use the journal as a keychain as soon as he actually had keys to put on it. But the wrapping paper had probably been discarded in one of his mom’s past scourings of his room, and the journal had been forgotten with the unused swim trunks. They hadn’t been back to Gravity Falls since that summer, when their parents insisted that they spend time here at home instead of there, at the place that felt more alive and like home than ‘home’-home was now.
“OI, EARTH TO DIPPINGSAUCE!”
Dipper let out a shriek, dropping the tiny journal with a clatter on the floor and nearly falling backwards over his chair. Mabel was standing in his doorway, one hand on her hip, and the other making an ‘Earth to Dipper, come in Dipper’ motion. He took a second to slow his suddenly-racing heartbeat, before clearing his throat. “Uh, heh, sorry Mabes. I was trying to figure if there was an angle these shorts didn’t look like an abomination to common decency.”
She leans back on his door frame, glitter shimmering against her pastel-blue tank top, with a faded unicorn dancing under a rainbow with the words Magical! emblazoned in a smattering of even more glitter. She was wearing an inflatable swimming ring, bright yellow and with the head of a duck jutting from the front like the prow of a ship. The duck had what Dipper could only see as a surprised expression, likely at the injustice of being used as a flotation device. Below that, her bare legs led to a pair of purple sharpie-patterned sandals, emblazoned with a neon-green ‘M’ and ‘P’ on the tops of the straps.
“Well, the Mabester is quite a renowned expert on fashion,” she says, looking up to the ceiling in thought while tapping her chin with a finger before glancing back down at him. “Lemme take a look-see. Worst case, Dad might have some of his old trunks you could-”
He cuts her off with a hurried shake of his head. Their dad had a penchant for incredibly short-shorts, and Dipper was already feeling self-conscious enough. Mabel gave him a solemn, knowing nod, before looking him over, making little “Hmm, hmm, hmmmm, mhm, hmmmmmm” noises as she assesses his fashion choices..
He caught a glimpse of a bright-red swimsuit strap under the pastel tank top before Mabel shifted again, this time to peer at him while pursing her lips, fingers stroking an invisible goatee while she scrutinized his attire. She leans back and continues looking at his shorts, and he gets another flash of red swimsuit beneath the surprised duck face. He swallows, and again tries to stamp down the thoughts that pop up like little malevolent soap bubbles.
The thoughts had cropped up occasionally, the last year or two more than most, but for the most part he’s been staying on top of keeping them squelched and their physical reactions minimized. It doesn’t help that he was worried that he and Mabel’s twin telepathy might pick up on that, and that anxiety is made worse by Mabel seeming to wear red every time the evil bubble thoughts bubble up. The color of her swimsuit today was seemingly mocking him, and the heat began to rise in his cheeks, attempting to turn his face the color of her suit.
Today, the bubbles are proving un-poppable, and he can feel himself starting to stiffen and tent his trunks. Oh god, not now, not while she’s looking right at it. Seriously, brain, you’re going to go and pull this on my NOW of all times? He cursed his evil body, and began frantically trying to picture Grunkle Stan naked, but to no avail.
He can see her gaze start to drop lower, no doubt seeing the pronounced bulge, and he can feel his stomach drop as his ears start to burn as the heat spreads up from his cheeks. He squelches his eyes shut, not wanting to look at her when she inevitably says-
“You kept it!”
Huh? He wasn’t expecting that, and he hears a rush of movement and a quiet thump.
He peeks an eye open and almost jumps back again, a little “gah!” escaping nonetheless. Mabel is on her knees right next to him, her gaze focused on the floor. His breath catches as he realizes her head is right next to his shorts, and less than a few inches from his-
No. Bad thought; Quit tempting the telepathy already.
She darts out her hand, and grabs the miniature journal, spare glitter from her poofy furry bracelet re-infecting the keychain with the herpes of craft supplies. “Well, hello you little rascal you,” she says, turning over the journal as she quickly inspects it for damage.
She gets to her feet, as Dipper begins to sigh in relief, and Mabel thrusts the journal towards him, a wide grin pleading with him as he chuckles and pulls his keys out from a pocket of his rancid jeans in the corner. He finishes sliding the ring with his other keys, and is about to slip it into his swim-shorts pocket when he looks up to see Mabel giving him a pout.
“What? What’s wrong?” he says, before she pointedly looks at the Rumble McSkirmish keychain he already had on there and back to him.
“Really, Mabel? But that’s my favori-” His feeble protest is cut off by Mabel turning the Sad-o-meter to 11, her puppy-dog eyes making his stomach do a floop, and can feel some of the flush from his face redirect itself southward, and again he begins to harden and-
Nostopitalready.
He gives a long suffering sigh aloud, and threads the Fight Fighter off of the ring, leaving the Journal along with the house, car, and school locker keys. Tossing Rumble off onto the cover ofTrigonometry: 1984 Edition, he begins to ask “There, is that bett-”
Before he can finish, Mabel has bounded over to grasp him in one of her bone-crushing megahugs, making a happy “Squee!” noise the entire time, and rocking him side-to-side. He used to hate it when she did this, since it tended to remind him of his own noodly arms, but now he just kind of accepts it.
Dipper smiles, but suddenly has a jolt of terror as he feels a wonderful bump of her smooth leg against his crotch.
No, no, nononono-
It happens again as Mabel twists slightly side-to-side with her megahug, her “Squee!” now muffled by his shoulder, and by the third time he feels the tent re-assert itself.
Oh god, she had to have felt that, and he can feel his stomach drop, a cold bead of terrified sweat running down the back of his neck. Mabel breaks off the hug, and Dipper panics, mentally racing to prepare what he can say to explain this.
It’s all just a misunderstanding, I would never want to find you attractive. Er, I mean, you are pretty and all, but you’re my sister, and guys sometimes get weird boners, completely unrelated to seeing their sisters in swimsuits, honest, and ohwouldyoulookatthetime.
He runs through a dozen possible ways the conversation could end, most of them ending with her slapping him in disgust, or running off crying. In all honesty, he can’t tell which would be worse, butanything would be better than the neutral expression she’s giving him now and-
Her little smile a moment later douses his internal panic, and after a blank moment he chuckles awkwardly before smiling back at her, grinning sincerely both at her enthusiasm as well as his own internal relief.
She must not have felt anything! He can hear an internal hallelujah choir as he smiles and allows his shoulders to relax from the terrified tension they held a few seconds before.
Punching him in the shoulder, Mabel twirls and walks to the doorway. “Well, let’s get this show on the open road. We’ll need at least a half-day if we want to catch all the rides before the park closes, and this girl is a bonafied wannabe fish when it comes to water parks.” She crosses her eyes and purses her lips, making bloop noises as she imitates gills with her hands and runs down the stairs.
Dipper laughs, smiling as she leaves, and slips the keychain into his pocket before shrugging on a t-shirt before following her down the stairs and out the door. Soos gives him a thumbs-up from the waiting van as he starts the engine, honking the horn as Mabel waves him towards the car.
Well, that could have gone a lot worse.
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The Tunnel