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Unexpected (a Pinecest story)	By : Edward_or_Ford Category: +G through L > Gravity Falls Views: 18898 -:- Recommendations : 0 -:- Currently Reading : 0
Disclaimer: I do not own Gravity Falls or its characters. I will not earn any money from this story.

Chapter List
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Spring 2013
Dipper and Mabel continued their final year of middle school, closing in on completing the eighth grade, preparing for the transition to Piedmont High School. Dipper was at or near the top of most of his subjects, and Mabel was a solid student who was president of the Spirit Club. As spring set in and graduation was approaching, the school year had been completely successful for the Pines twins so far.
Outwardly, at least. Inside, that was a different story.
Their secret feelings for one another had continued to grow. But they still had to keep up the appearance of normalcy. Even though they both ached inside because of their longings, they were resigned to never being able to act on them. Somehow, they both had to suppress their thoughts, which they believed to be depraved, and deal with the fact that life would have to go on. School assignments and extracurricular activities helped, so as much as possible they buried themselves in their work.
“We’re going back to Oregon this summer?” Mabel asked. “Why?”
Dipper agreed. “Yeah, we thought Grunkle Stan and Great Uncle Ford wouldn’t even be there!”
Their father confirmed Dipper’s statement with a nod. “That’s true, kids. Your grunkles left last week for the far North, and summer is the only time the sea ice breaks up enough for them to go. They won’t be back until mid September.”
“But today while you were at school, we talked on the phone with your friend Soos,” their mother continued. “He asked if the two of you could go up again this summer. You could work for him and his fiance at the Mystery Shack, earn yourself some spending money, and have fun. Same as last summer!”
Dipper and Mabel exchanged looks. They had never relayed most of the stranger events of the last summer to their parents, particularly those that Mayor Cutebiker had decreed to be part of “Never Mind All That.” The twins sure hoped that another summer wouldn’t bring more of the same weirdness, for they had barely gotten out alive.
Also running through their heads was the sleeping arrangements. They knew that Soos and Melody had converted Ford’s old room into their bedroom, and Soos’ Abuelita had moved into the bedroom that had been Stan’s. That meant that Dipper and Mabel would be sharing the attic again. The idea thrilled and scared them, but they couldn’t let the other know anything about those emotions.
Regardless, the decision was made for them. Dipper and Mabel’s middle school graduation would take place at the end of the week, and then they would board a bus the day after that. They had to be prepared for another summer in Gravity Falls, whether they thought they were ready for it or not.
Summer 2013
Gravity Falls would always be a bit of a strange place. After all, there were gnomes, manotaurs, unicorns, and any other number of weird creatures that lived in the woods near the Mystery Shack. But with the defeat of Bill at the end of his Weirdmaggedon, much of the town’s danger had disappeared.
And of course their great uncles were not around. Grunkle Stan had been such a huge part of their summer the last year, and Grunkle Ford, quirky as he was, also had been beloved. But they were off on their own adventure.
Plus their other friends in town weren’t around. Pacifica had responsibilities at home, learning the ropes of honest capitalism along with her father. Candy and her family had moved away, and Grenda had been taken on a summer-long trip to Austria with her parents by her boyfriend. And their older friends, including Wendy, were largely busy with summer jobs.
With the help of Melody and the support of his grandmother always nearby, Soos became a quite capable businessman. Tours through the exhibits were orderly and entertaining, and the Mystery Shack became a well-oiled enterprise. Dipper and Mabel had regular hours of work, predictable days off, and were paid fairly for their labour.
Coupled with having seen so many unfathomable things the year before, the returning Pines twins found their second summer vacation in Gravity Falls to be … boring! All the spontaneity and adventure was missing.
As a result of this, the twins didn’t have any distraction from each other, and their uncomfortable secrets they kept from one another.
“We’re the place where the ducks roar, and the bears quack!” proclaimed Soos loudly. “Congrats, Dudes! You survived the Mystery Shack!” He smiled proudly as the large group of tourists laughed at the charming Mr. Mystery’s rhyme. Soos had just completed his usual great job of being a guide to the Shack’s attractions. The visitors started filing out the door, with a few finishing up their purchases of souvenir trinkets. He followed them out, chatting up the customers, knowing that they would tell others of how wonderful their host had been while visiting the quirky tourist trap. Melody winked at him, and Soos returned a happy thumbs-up.
Melody finished straightening up a rack of postcards, then patted Dipper on the shoulder as he swept the floor. “You alright, Dipper?” she asked kindly. “You look a little tired.”
Dipper nodded as he continued his work. “Yeah, yesterday was a long day,” he replied. “I'll be okay.”
“Sorry to have to put you to work so soon, but we’re in for a busy day today.” Melody sidled up to Mabel as Soos was outside waving goodbye to the group as they were queueing to get on their tour coach. “Nicely done on the cash register, Mabel,” she said admiringly. “You just got off the bus yesterday. First day back and you’re in the swing of things quickly!”
“Pfft! You didn't see me last summer!” she joked. “I'm still scraping nine months of rust off these fingers! Wait’ll you see me in another couple of days!” Mabel made a silly grin as she flexed her fingers dramatically.
Melody laughed with delight. “Does your sister ever turn off the goofy attitude?” she asked Dipper, who was sweeping the floor.
“Nope,” Dipper smiled fondly. “I haven't found the off switch yet.” Mabel blew a good-natured raspberry towards him.
“Soooo …” Melody said, glancing at Mabel knowingly, “I remember you being Soos’ dating coach last year. You did a great job! Are you … taking your own advice these days? How's that search for romance coming?”
Mabel couldn't exactly say she had already found the boy of her dreams, and that he was a few feet away holding a broom. But she also knew that she was a horrible liar, and if she tried to say there was no one, it would be an obvious fib.
“Well, there … is someone I like,” she replied, feeling her face flush. From the corner of her eye she saw Dipper turn towards her. She quickly turned back to Melody, forcing a grin on her face.
“Oh, ho!” Melody exclaimed. “A boy at your school?”
Mabel shrugged, hoping Melody would drop it. “Yeah, he goes to my school.”
“Really?” inserted Dipper nonchalantly as he resumed sweeping. “I never heard about this …” He left off the next question, the one he didn't really want to know the answer to: the identity of the boy Mabel liked.
Mabel was not going to volunteer that information in any case. She quickly recycled one of her lines from the previous summer. “I don't tell you everything!” she teased with a large smile.
Dipper feigned disinterest and went back to his cleaning duties while Mabel changed the subject and continued chatting amicably with Melody, this time about the relief of no longer enduring metal on her teeth.
In the dark of the attic that night, Dipper lay wide awake. He was exhausted, but how was he supposed to sleep?
The previous night had been his first night sleeping in the same room with Mabel since last summer. He was telling the truth to Melody: it had been a long day, what with traveling by bus for 14 hours, including a transfer. Soos and Melody had their beds already made up, and they quickly went upstairs. He was able to disregard how weird this was going to feel, at least for the time being.
Dipper had fallen into a light sleep instantly, but the lack of background noise left him hyper-aware of small sounds. As a result, he woke up slightly when he heard Mabel shift her position. Facing away from her, he was about to drift back off again when he heard Mabel's breath quicken, and could barely make out a tiny rhythmic squelching noise that was in time with faint rustling of sheets.
He had instantly become aware of what Mabel was doing. He didn't think it was right to listen in, but letting Mabel know he was awake would have been even worse! Trying to keep his own breathing as quiet as possible, he had to lay still, his erection straining, as he could hear Mabel gradually work her way up to completion. It was almost painful to listen to the stifled squeak from her throat, accompanied by rapid wet rubbing noises, as she climaxed. Dipper was awake in frustrated arousal for at least an hour after that, and then had erotic dreams when he had finally fallen asleep. Horrified, he'd awakened in a sticky mess, as he'd had a powerful wet dream about Mabel. He managed to get to the shower without being noticed, but it didn't prevent him from being tremendously anxious and embarrassed.
Now it was the following night, and on top of everything else, he was jealous! Mabel's statement that there was someone at school she liked … it tore at him. This mystery boy was obviously who Mabel had been fantasizing about the previous night in the dark. The guy was so lucky! What he wouldn't do for Mabel to feel that way about him, instead! Dipper wanted to be the one making her feel loved and special, making her feel pleasure. For his fingers to be running over her skin, then probing her mysterious nether regions for her. He wanted her to feel his urgent kisses on her lips, and his tongue and gentle lips on her breasts. He wanted her to feel him pushing himself into her, make her know that he loved her more than anything …
Dipper couldn't take it anymore. He was as hard as he could remember, and he needed release. He listened to Mabel's deep, regular breaths, glancing over to her peaceful, relaxed face. “Mabel?” he whispered, trying to make sure she was asleep. Her light snoring continued uninterrupted.
Beneath the covers, Dipper carefully pulled his shorts down below his knees and pulled one leg out to free his movements. Then he grasped himself and very slowly began stroking, the naturally-lubricated foreskin gliding down over the uncircumcised head with each downward pull.
His breaths came a bit quicker, more labored, as he allowed his pelvis to thrust up slightly with each agonizingly slow pull. He knew he had to keep quiet. Mabel’s breathing sounded the same as before.
Dipper had never had to be this careful, had never taken this long with his masturbation sessions. The pressure built in his groin as it never had before.
Unwittingly, the pace of his movements gradually increased. He struggled mightily to keep silent, breathing in tiny shuddering gasps. He barely processed the light fapping noise he was producing as he imagined Mabel moving on top of him, his penis deep inside her, his sweaty skin pressed against hers.
Eventually Dipper began feeling the delicious tightening, and he knew his release was imminent. He squeezed and pulled even faster. Then he realized with a start that he had nothing to “catch” his semen with. In a panic he sat up, yanked off his t-shirt, and threw it around his jerking hand and penis barely in time. He winced hard as the biggest orgasm of his life hit him, and he erupted repeatedly into the shirt. A whimper escaped his mouth before a huge intake of breath. Then he was panting quickly, his body deprived of oxygen as his penis produced the last drops of his seed.
As he calmed down, he glanced over to the other bed, thankful that Mabel had not moved a muscle. It would have been the most embarrassing moment of his life if she'd known what had just happened. He wiped up the remnants of his mess with the shirt, quickly tossing it down into the gap between his bed and the sloped wall. Pulling his shorts back on, he collapsed carefully back onto his pillow.
Finally relaxed, his chest rising and falling quickly but gently, Dipper again turned his head to gaze at the beautiful, sleeping face of his sister. His heart squeezed in pain for an instant, knowing everything that he felt for Mabel was wrong, and that she could never feel the same way about him in return. A tear formed in his eye, and he quickly wiped it away. Finally, the fatigue from lack of rest and the hormones released from his orgasm combined to allow him to fall into a blissful sleep.
As soon as Dipper's snores became deep and regular, Mabel's eyes opened. Hours passed before sleep claimed her again that night.
Soos and Melody disappeared from sight, still waving goodbye from the side of the road as the bus rounded a corner and headed for the highway.
Mabel exhaled dramatically and flopped her head on Dipper's shoulder. “Heck of a way to celebrate our fourteenth birthday, huh Bro?” she muttered.
“Yeah, we've definitely had better,” Dipper grunted in reply. “Especially since our birthday was a Saturday this year. You’d think Mom and Dad could’ve driven up to pick us up, so we could have a nicer day instead of an all-day bus trip. Kinda spoils the fun!”
“They said they couldn’t leave Waddles alone in the house, and it’s too far to take him up and back at once,” Mabel said, defending her pet from any hint that the pig was at fault for their situation.
“Okay,” Dipper grumbled, “But it still sucks.”
“Yeah,” Mabel agreed. “I don’t even feel like playing ‘bus seat treasure hunt’.” Dipper leaned his head onto hers in sympathy, causing Mabel to tuck her chin in comfortably. It always made her feel instantly better when she could have cuddle time with her Dippy Ruxpin. “I guess all told, though, it wasn’t that bad of a summer! I mean, you’re glad we came back, right?”
Dipper couldn’t stop a small smile from growing. “Yeah, I am. Maybe it wasn’t as incredible or unbelievable as last year, but it was fun! We got to kick back a lot more this summer, didn’t we?”
Mabel smirked. “Yeah, not quite as much screaming and running for our lives, huh? I think after a while, that started to wear a bit!”
They started reminiscing about the crazy events of the previous summer, laughing at the silly and happy memories, neglecting to bring up the scary and horrific ones. They also replayed some of their recent fun times of the summer just concluded.
Unmentioned were the subjects less comfortable to talk about. Things like how Mabel started noticing just how often Dipper demonstrated his cute protective tendency, while Dipper began more and more appreciating Mabel's efforts to draw him out of his shell. And like how they each noticed the way their siblings looked better in their swimsuits at the pool than the previous year. And, of course, their silent observations of each other's occasional masturbatory practices were also ignored.
They had both successfully learned to push down their secret longings for one another, and to only show the genuine sibling affection that they still felt for one another. They laughed together as they recounted the best of their memories, then started thinking about their immediate future.
“So … what about high school?” Dipper asked. “We start in a few days. You ready for it?” Dipper's voice became more tentative.
“Nope!” Mabel replied immediately, then a little quieter, “but I guess we gotta, huh?”
“Yeah,” Dipper said grudgingly. “Back to the bottom of the totem pole. I’m not scared of the work or anything, but I know what it’s going to be like. You know … nerds don’t exactly get an easy ride.”
“Dipper, you’re the best kind of nerd,” Mabel shot back. “You’ll be so busy leading the math geeks team, and your dumb DD&MD club, and whatever else you wanna do, you’re gonna run the school. You’ll do fine!” She punched Dipper lightly on the shoulder, drawing a half smile from her brother. Then she slouched and put her head down. “It’s me who’s not gonna fit in!” she said with a frown.
Dipper scrunched up his face in confusion. “Wait what? Why do you think that?”
“Come on, Dip! You know I’m still just a goofy little kid! I’m not close to cool enough to fit in at high school, not the way my weird brain works, man!” Mabel turned her head to peer up at Dipper. “I mean … I like being silly, you know that!” she said with a brave smile. “And that’s fine for middle school, I guess, but … there’s going to be seventeen- and eighteen-year-olds there! It’s no place for a little freak show like me!”
Dipper nudged her shoulder with a grin. “Mabel, they'll be lining up to be part of your freak show, I guarantee it! I know I'll be buying a ticket!” Mabel nudged back half-heartedly, but Dipper could tell that she was still unconvinced. “Seriously Mabes. Square pegs in round holes: that's us! We'll help each other through. We always have!” Then it was Dipper's turn to twist his head away slightly. “Unless … you don't want me to hang around with you anymore …”
Mabel looked astonished. “Dipper … who said I don't want you with me? I never said that!”
“Well … well not exactly, but …” he stammered, suddenly feeling the urge to scratch the back of his head. “You … you said … back when we first came up here a couple of months ago, you told Melody there was a guy at school you really ... liked … and I just figured you’d … I don't know, you'd want to try to be with this guy or something ...”
Mabel remembered the conversation, and hadn't realized it bothered Dipper so much. She'd been trying to cover up that Dipper had been the guy she liked, but instead made him feel abandoned. And he had nursed that feeling all summer! The poor goober! “Oh, poop, Dipper!” Mabel said warmly. “How could I want to be with some other guy when I’ve got you!”
Dipper turned back and looked at Mabel strangely, and she realized how that sentence had sounded. It sounded altogether too much like the truth!
“I mean, hah hah, I was just joking with Melody about there being someone! You know … didn’t want her to think I’m a flop at the old game of love, am I right?” Mabel proclaimed, grinning. “And of course I want to hang out with you!” she added.
“Yeah, okay,” Dipper replied after a moment. He paused again, clearly trying to make up his mind about something. Then he blinked twice and took a breath before continuing.
“I always want to hang out with you, Mabel,” he said quickly, a tiny catch in his voice.
Mabel blinked in return, her nervous grin frozen on her face for an instant, then it melted into a genuine, affectionate smile. “Dawwwww …” she cried quietly. “I need a big one of those awkward hug thingies!” She pushed her arm around his back and leaned over to squeeze her brother, her cheek pressed against the front of his shirt.
Dipper returned the hug tentatively for a few seconds, then more tightly and comfortably as his jaw rested on Mabel’s head. They held the embrace for a long moment.
“Happy Birthday, Bro Bro,” Mabel murmured into Dipper’s chest.
“Happy Birthday, Sis” Dipper replied softly, his lips lightly brushing the top of her head.
With a quick “Pat! Pat!” and a fond chuckle, they released one another reluctantly, then rested their weight against one another again to get comfortable for the hours of bus travel to come.
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Unexpected (a Pinecest story)