Archive of Our Own ^beta

A tall, if lanky, maybe somewhat scrawny young man was rubbing his temple as he witnessed this epiphany, brown, messy hair peaking out from under his green and black plaid cappy, stubble on his chin. He was wearing light travel clothes of brown cargo shorts, a blue tshirt, and a backpack on his back. Next to him was a young woman, the same height and almost exact same age, younger only by a few seconds. She was wearing a magenta sweater with a wide neck, hanging over one shoulder, leaving the black spaghetti strap top she wore underneath visible on the other. It narrowed around her waist, accentuating her big chest. On her bottom a blue mini skirt from which long slender legs extended, clad in flats and leg warmers. Her long brown hair was brushed to the right, showing off her undercut with a shooting star shaved into the left side of her head. She was pressing her lips together, eyes pointed downwards.

Dipper and Mabel stared deadpan at the sight before them. They were a little speechless, given that they had quite frankly tried everything they could to prevent the situation before them from happening. But all warnings and assertions failed to dissuade one Pacifica Northwest who had insisted she knew better. 

"This way's a shortcut, trust me!" She had asserted, despite having no more knowledge of the local roads than the other two, and at best having held a map twice before in her life. "This way's so much faster, we'll be at that church or whatever in no time!" She had insisted confidently, despite not even remembering the St Marco's Basilika's actual name. "Oh come on, it's not THAT big." She had been absolutely certain, in spite of the fact nobody knew the actual size better than the Pines twins.

And that's how Dipper and Mabel had found themselves looking at their shared girlfriend's sizeable posterior, suspended mid air, and taking up a good portion of the narrow alleyway before them as the blond girl was wiggling helplessly, heeled feet pushing against the ground and her meticulously manicured hands tried to get a grip at the old stone walls of the buildings on both sides. 

Let’s rewind a little. The three of them were currently in Venice, as part of their spring break Europe tour together. Dipper was enjoying the history, the culture and the art, you know the nerd stuff, while Mabel was having a blast messing around, and taking photos, and finally Pacifica was all about shopping and tasting all the local delicacies, like all of them, everywhere, always. Well, she is paying for most of this so who are her partners to stop her. The next sight seeing stop on their list would've been the Basilica di San Marco and on the way there they were enjoying the charming sights of the old town. It was certainly very different from the states, that's for sure. They had been travelling France and Germany before and observed the same thing. A lot more walkable spaces for once, pretty much every big city also has a historic old town, a lot more classical and traditional architecture, and narrow alleyways snaking between old houses. Now on their way to the Basilica, Pacifica had suddenly fancied herself a masterful navigator and insisted that there was a shortcut through just one such alley. A narrow space between two houses, and to her credit, she was technically correct. Pacifica had correctly identified that they could save about ten minutes on that route. Dipper, who was otherwise in charge of the map, knew this as well, but when he was navigating, he had another consideration to account for. 

"Pazzy, don't you think that might be a little tight for you?" Mabel, subtle as ever, pointed the issue out, outlining her girlfriend's shape in the air with her hands. Pacifica Northwest, former spoiled rich brat antagonist, now just a little bratty and posh but caring girlfriend to the Pines twins, was a rather horizontally endowed young lady, at least on her bottom half. Her chest was pretty modest, not particularly standing out under her combo of a loose strapless black top and lavender jacket. Now her butt was a very different story. A juicy plump dumptruck of an ass, clad in a tight pair of white booty shorts, accessorized with a purple belt, matching her jacket, and black tights underneath. While more than a whole head shorter than her partners, Pacifica's hips were five times the width of her shoulders, making the plush posterior a wondrous sight for sore eyes. The twins were intimately familiar with the fat booty in question, as it was their personal privilege to give it much attention when they were in private. They knew it intricately and arguably understood its sheer size better than any other human being on earth. But Pacifica begged to differ. 

"Ha-ha Mabel, I am well aware my ass is huge." The blond girl spoke in a tone dripping with affectionate and teasing sarcasm. "But I think I would know best how thick I am and where I can fit through. This cake is attached to me after all." She gently slapped her butt to underscore the point, making it wobble inside her more than filled out shorts.

"Pacifica, sweatie, let's maybe stay on the main road. These alleyways are pretty narrow. We are trying to prevent some pretty embarrassing situations for you here after all..." Dipper was still trying to convince her with reason and an appeal to her sense of self preservation. 

"Yeah, believe it or not we've also got some hands on experience with your booty, so we might have a pretty good idea how big you are babe!" Meanwhile Mabel was still trying the blunt truth.

But neither of the two Pines siblings managed to get through to Pacifica, who was now even more determined to prove them wrong. "Oh this is just rich, and I'm well aware of the irony in me of all people saying this. The nerd and the goofball think they know my body better than me?!? I can't... I'll show you, you stupid... And then..." With that she stormed off in the direction of the alleyway, continuing to mumble curses and proud proclamations under her breath. She entered directly into the arrow space and immediately her hips caught onto the side walls. "Now watch, all I have to..." She wiggeled herself a little further into the alley, seemingly thinking that all she had to do was get free from the initial stuckage and then she'd be out scott free laughing in her partner's faces. In reality all she did was seal her fate. A moment later Pacifica had also noticed that she was in fact not getting any further along the way, leading us back to the present situation.

"Mabel? Dipper? Where are you guys? Come on, help me get outta here! Guys?" Pacifica was still stuck at the entry of the alley, her fat ass wedged between the buildings, as she had been for the last three minutes. Her feet were now desperately flailing in the air, but her posterior wouldn't budge. She was pleading for help but the twins were standing at a slight distance where she couldn't hear or see them. Meanwhile Mabel and Dipper were taking in the rather pathetic display their girlfriend had made of herself. "Guys, please! Seriously, this isn't funny!"

"Should we help her?" Mabel, ever the good hearted angel she is, was the first to feel a twinge of empathy for their struggling partner. But she was quickly shut down by her twin brother.

"No! She insisted she could fit her giant dump truck through there, in spite of both of us trying to warn her. She made her bed, now let her lie in it. I say we let her suffer for a bit." Dipper was not budging on this, crossing his arms over his chest in defiance.

"Aww, but Pazzy's gonna be so embarrassed when -" Mabel was once more cut off abruptly. 

"Nope, not having it! We tried to help her. Princess Fatass over there didn't want to listen. She's got no one to blame but herself" Her twin brother stayed firm, wearing a slightly smug expression. "Maybe this way she'll learn to listen to us next time." 

"I guess you're right..." The brunette girl finally acquiesced. "It is pretty hot, seeing her ass stuck like this though. She's looking extra juicy in those shorts, too! I am quite liking this view~" She nudged her brother knowingly.

"Sigh - You and me both sis..." Dipper also finally relaxed a little again, a slightly shameful smile and a blush creeping onto his face.

Pacifica had been in there struggling for about ten minutes by now. "Come on, I said I'm sorry, please get me out?"

"Say bro... it would be a real shame if we didn't seize this opportunity presented to us. Maybe we can make sure Paz really never forgets this 'lesson', huh?" Mabel was wiggling her eye brows suggestively, while her eyes moved between her brother and their girlfriend's posterior. 

"You thinking what I'm thinking sis?" As usual the twins were on the exact same wavelength. They moved over to the alleyway, and positioned themselves behind Pacifica.

The blond girl could now finally see them again. "Oh thank god, you're finally here! Alright, now all you have to do is... uh guys?" But the twins were not responding. They were seemingly loosening their shoulders and stretching their arms. "Uhm guys? What are you doing?" Still no response, and Pacifica was starting to get a little scared now. Only as the other two began to take a swing she realized what they were about to do. "Wait, wait! Please, not that! Not here! Mabel, Dipper please I don't think I can take-"

All of her pleas fell on deaf ears, as the twins finally exclaimed in unison: "DOUBLE PINES SPECIAL SENDOFF!!!" Perfectly synchronized, connecting at the exact same time and with maximum force, a double slap of titanic proportions sent Pacifica's ass flying upwards, only for it to swing back to where it was still stuck, wobbling in its confines. 

"Wait, wait, wai-oooooaaah!!!" The stuck girl's pleading was interrupted by a prolonged, pleasurable moan. Her back arched, her eyes rolled back and her legs shivered as she came from the combination of embarrassment and stimulation. This move always got Pacifica, she was an absolute freak for having her fat ass spanked. And as she came down her body went limp.

"There, now she'll definitely remember to listen to us. Wanna get a coffee while we wait for her to regain her senses?" Mabel spoke as she gently patted their girlfriend's butt.

"Mabel, that sounds amazing right about now." Dipper mirrored her movement. "We can get her out when we're back."

Like that the twins left Pacifica to calm down and marinate in her humiliating predicament just a little longer.