NSFW warning.
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Her watch, bobbing on her unsteady arm, read 3:15 already, the cartoonish faces of the rabbits that were the tips of the hands only momentarily distracting Mabel from feeling a bit callous. She didn't really want to leave Dipper alone in the house like that, nor did she want to leave him to the dog pile of hard work that waited for him. Although… it was amusing to a degree, at first. But she recalled the brisk dowsing feeling of plunging feet first into water more than thirty degrees cooler than the air, and the hot and cold feel of the atmosphere meeting her soaked skin when she breached the pool's surface. In that exact moment, she felt a little regret.
That's why she left the pool early, even though it was fun and appealed to the small part of her that was wanton and hedonistic, even though it was a long walk home, and even though there was one guy there that looked cute enough to flirt with for the afternoon, just for the heck of it. In the end, it wasn't Dipper's fault, she told herself. Sure, he was out all night, probably, which was his choice and he was a jerk for not inviting her for whatever crazy nonsense he was getting into.
"Okay," she uttered plainly as she marched down the gravel road in an obnoxiously pink swimsuit. "Mabel, time for some apology practice. Dipper, I'm sorry."
She stopped in the road, shaking her head disappointedly as if someone was just falling short of her every expectation. Oh wait, someone was: her.
"That's really insincere, Mabel. You could've poked him with a stick, at least. Try again."
"I know, brain, lemme get it right! Hm… Dipper, I'm sorry."
"That was pretty good… roll with that, keep at it girl!"
"Okay," Mabel answered herself with a small smile, continuing her walk.
Every few steps, Mabel would reiterate her apology, trying to get that exactly perfect note of sympathy. Sometimes she'd miss the mark, have to pause to re-psyche herself up a moment, then resume her afternoon stroll.
She passed the time and distance much in this way from as far back as town, letting her ignore the sun overhead and the occasional rock caught between her flip-flop and her foot. All it ever took for Mabel to keep on keepin' on was a little devil-may-care, a dash of never-say-never, and the ability to completely shrug off the slings and arrows of reality. And her brother, who she was subconsciously martyring herself in this heat to see. And see him she did, just as she was approaching the Mystery Shack, just as he was leaving through the back door, just as he was guiding someone who looked like some sort of all-grown-up Pacifica Northwest by the hand towards the woods.
"Wait, what?!"
"I'm sorry for crying…"
"Don't be, just look around and stuff."
The treetops shifted lazily in the breezes as they would grace Dipper and Pacifica with their southbound presence, a collage of pine trees here and there perforated by a grove of aspens. The sunshine lit the leaves up at every angle, an aesthetic phenomenon that they both found they liked. Dipper thought she might like this part of the woods, since it was one of the few places that had these trees.
"You know," He said softly. "I did some reading, and it turns out there aren't that many aspen trees in Oregon."
"What? That sounds made up. You're making this up."
"No, it's true. Some places they're everywhere, but not Oregon."
"That's kinda' weird."
"Not really, when you read about why…"
"No, you're right, I bet the aspen thing makes sense." She answered somewhat rhetorically. "It's weird, though, that you read about that."
"Huh, well, you said you liked aspen trees." He gripped her hand a little tighter as he explained himself. "So I educated myself."
"Hah, no. I said I liked Aspen. But… it's cute that you think about it like that."
Pacifica rubbed one puffy eye after the other, annoyed with herself that she was still weepy about this whole thing. It was one thing when the wound was fresh, but she had felt like she'd come so far in a month's time.
"You okay?"
"Yeah." Pacifica muttered. "Just… it's all so dumb. I don't know why I freaked out."
"Well, they shut off your money." Dipper reasoned, somewhat inconsiderately.
"Just my credit cards. Probably my main account too, so that's useless, but last year I set some money aside from my junior investment seminar fund and put it in some certificates of deposit without my mom or dad knowing."
"That's kinda' devious." He said through a smirk.
"Not compared to what they do with their money, believe me. At any rate, it makes good business sense now, doesn't it?"
She kicked a rock into the underbrush, causing a squirrel already unsure about the world to abandon all hope of enjoying a pine cone it had carefully rolled away from a tree trunk. Pacifica watched it scramble up and around a thin little aspen tree, frenetically crawl out onto a branch, and leap to another tree no more than four feet from where it began.
"Squirrels are dumb."
"Well, that's probably a defense mechanism. You know, run around like crazy, keep the predators guessing… what?"
"You're such a nerd." She said with a laugh. But then she sighed. "But you know what? You're my nerd."
He stopped in place when she while she strolled on; her little comment made his heart skip a beat and a grin dominate his face, and Dipper jogged to catch up with her, sneaking his fingers back into place with Pacifica's and squeezing tight. She smiled as they shared a look, and sighed as they approached a narrow glade.
"Know what, Dip?" Pacifica opened as they stepped into the small clearing with an old oak tree dominating one corner. "You were right. I already feel a lot better out here. Not so claustrophobic."
"I'm glad. You know, Pacifica, I just wanted—"
Dipper was interrupted, happily, when she wrapped her arms around his neck and pulled him into her waiting lips, a gentle and smooth kiss ending with the slightest tug of his lower lip by her teeth. He smiled and kissed her back, pulling her close by the small of her back; when their moving and jostling skulls knocked loose Dipper's hat, Pacifica broke the kiss a moment to giggle.
"Mmm, you're too cute for your own good." She said before nuzzling his neck, her breath tickling his skin. "You know, before I found out the bad news, I had a fun idea for you and me later."
"Oh yeah?"
"Mm-hmm." She took to nibbling on his neck while guiding his hand by the wrist to the waist of her skirt, then down a pleat to the skirt's hem, then to bare thigh. She changed direction then, tugging his hand up, up, up, and pressing his palm against the bare flesh hidden by her short white skirt.
"O-oh! Oh man… Pacifica, are you…? Are you not wearing anything?"
"Well." She admitted with a chuckle. "Almost. I'll let you see in a minute. For now you can- mmm, good boy."
Not needing her go ahead, Dipper's curiosity turned to initiative as one hand, then another, squeezed on her buttocks, pulling them softly upward and releasing them just as carefully. Pacifica rewarded his explorations by grinding against his frame, pressing her hips and breasts against him, and parting his lips with her tongue. She moaned softly into his mouth as he kneaded her backside with increasing greed and excitement.
Neither Dipper nor Pacifica saw the forest for the trees; huddled in a bush nearby biting her knuckles to keep her cool, to not scream in blaring disbelief and shuddering rambunctious joy, Mabel watched her brother and dared not draw breath. And he was with Pacifica. And she was so forward! At the angle they stood, relative to her anyway, Mabel couldn't see the absence of fabric Dipper was feeling, imagining that he was fondling her through panties. That alone was an exciting prospect, but Mabel was also trapped in the life and death struggle of bottling up an outburst as she thought about the two of them sneaking off and meeting like this all those times Dipper had vanished. No wonder he didn't know how to tell her! This was like that Shakespeare story about the teenagers where everyone dies!
"Oh my gosh! Ohmygoshohmygoshohmygosh, Dipper! Oh my gosh!" She inwardly screamed as she stared wide-eyed through a small gap in the shrub's branches. "You are so freaking cute together, oh my gosh!"
When their kiss broke, Mabel could see Pacifica's red, panting face; the way her hands roamed Dipper's back and her body shifted, it was plain as day the blonde girl was at wit's end. But what happened next made Mabel's jaw drop. In a split second, Pacifica dropped to her knees in front of her brother, expertly undoing his belt and button and pulling his pants down in no time flat. And there it was, Dipper's cock, in all its glory and in Pacifica's fast moving hands. Her tongue flicked across the tip a few times as she jerked happily on the appendage, making Dipper breath sharply as his hands found their way to either side of Pacifica's head. Her eyes darted up a moment, and with a moan she opened her mouth wide and nearly swallowed Dipper's entire member.
"O-oh god, Pacifica…!"
"Oh wow… Pacifica." Mabel thought as she watched obsessively. "That's… wow…"
The sight of Pacifica's head smoothly rocking in front of Dipper's hips and the sound of her brother breathing and gasping as whatever amazing things he felt boiled his blood… Mabel took to nibbling her hair and hugging her knees tight to her chest as she rolled slightly on her sandaled feet. All those books she filched, borrowed, secretly bought and read in the quiet moments of the night were nothing compared to this. And even though it was her brother that she was watching, it made Mabel feel like she was on fire… Maybe it was that it was her brother…
"Mmm, okay Dipper." Pacifica said with a gasp, working a single hand up and down his slick, shiny member, looking into his eyes before rising and shakily walking to the closest tree. She leaned forward against it, Dipper and Mabel looking on with hungry eyes as second by second Pacifica's fingers delicately reached back and gingerly gripped her mini-skirt by the hemline. She bit her lip as her digits slowly raised the curtain on her smooth, firm backside. The twins gasped silently…
"Is that…?"
"Oh my god." Dipper sighed, slowly approaching Pacifica, his hard cock somehow feeling even harder. "Is that a thong?"
Wiggling her hips, Pacifica only silently nodded, focusing all her effort on hugging the tree tight to keep her shuddering frame on her feet. Her body was burning top to bottom, and each step Dipper took toward her gave her cause to bite her lip and stifle her anticipatory moans. When at last he was directly behind her, Pacifica looked down at his rock hard member; it throbbed in time with his heartbeat, twitching with a red yearning that she desperately wanted to feel in her own body. His hands found their way back to her ass cheeks, pushing and pulling on them, intently tugging on the edges of her labia with his thumbs so he could watch the thong's smooth, silk string sink into her opening. Pacifica gratefully moaned and dug her perfectly manicured nails into the tree bark.
"Dipper!" She whined as her hips thrust back, barely nudging his glans. "Just-! Just-!"
"Just do it already!" Mabel screamed without screaming, not noticing her hand had wandered to the hot, wet space between her legs, her forefinger already eagerly working through her swimsuit.
Rubbing the still slick surface of his cock head against her velvety nether lips, Dipper tugged gently at the string that "barred" his way, and with a slow and painfully teasing lean forward started parting her most lovely flesh. They groaned in unison, Pacifica hugging the smooth aspen that supported her, Dipper clutching her hips, and Mabel as she pulled aside the bottom of her suit and timidly probed her own vagina as she watched in blind delight.
"Ooooh jeez." Mabel bit her lip hard as her thoughts ran wild, stifling an audible gasp as two fingers sank down to her second knuckle in one smooth flick of the wrist. "Oh boy, those two pervs got me goin'..."
Her eyes were glued shut while Mabel shuddered and fingered herself, opening them again when she heard the distinctive slap of skin on skin to take in the sight of Dipper rhythmically thrusting hard and fast. The lovers stood at an angle that allowed Mabel full view of Dipper's manhood, glistening with Pacifica's heated essence, each time it withdrew from Pacifica's pussy. And every now and then, when Dipper pulled a little too hard, the head would pop back out, making him shudder violently for a moment before he pushed the twitching thing back inside. Pacifica would nearly lose her footing whenever that happened.
"Oh my god… oh my god, Dipper. Keep your cock in her…"
Mabel shocked herself a little when she thought that word. And of course, she thought it each time she saw his swollen appendage emerge, and every time she saw it she would twist her fingers so that her knuckles flexed and jostled her swollen clit, physically shocking her with each instance she mentally said cock. So excited had she become, Mabel stifled herself by firmly pressing her free hand over her mouth; thankfully Pacifica's own mewls of delight covered the rest of their voyeur's din.
Dipper had taken to a swifter pace now, driving his member deep inside with strong thrusts that Mabel thought might hurt, but Pacifica seemed thrilled to receive. Her mouth hung open with her tongue lolling free, the girl sharply gasped each time Dipper's hips crashed into her backside.
"P-pacifica, I d-don't think I can last m-much longer." Dipper shouted through gritted teeth.
"Oh god, Dipper." Mabel whispered through her tightly clutching fingers. She fell onto her knees as her body began to spasm, her busy fingers grinding into her as far as they could, thwarted only by the rest of her hand.
Pacifica, hardly able to think and certainly unable to speak, merely had to turn her head and look back at her stuttering lover. He looked at her eyes, glassy and nearly rolled up into her head, her cheeks, painted the brightest red he could imagine, and her open mouth as saliva began to seep past her lip and tongue. In an instant, Dipper lost his mind, any thought obliterated, any feeling smothered and overrun by lust and a burst of light in his brain as his head tilted back in time with one final crashing thrust that pushed Pacifica hard into the tree. She wrapped her arms around it, clutching tight as Dipper ground his body into hers; she spasmed around his cock, her body shuddering and perforating her long, climactic moan with the pleasurable waves that overwhelmed her sinews and senses all at once.
In the bush, biting her hand to hide her own screaming orgasm as she lunged forward, Mabel fucked her own hand as hungrily as she would if her perfect man were just beneath her body and driving her knees into the dirt. In between bursts of ecstasy, Mabel twisted her fingers again and again, dragging out the orgasm as she imagined in vivid, lewd detail how good Pacifica must feel right now. When she finally calmed down enough to open her eyes again, Mabel's joy became a dull shock.
"Oh god… Sweet Belgian waffles, please don't let them know I just did that!"
She looked through the leaf cover again, seeing with great comfort that neither of the lovers had noticed anything, being instead content with tiredly grinding their spent bodies together at the hips while they began to cool down. Dipper and Pacifica slumped together where they stood, looking like two overheated machines letting off all their steam and running down their worn out, pent up springs. Dipper was the first to move in a real way, tenderly pulling himself free from Pacifica's whitewashed entrance with a low, slick pop. He was half-hard and coated in their mixed juices; when Pacifica lackadaisically lurched down and took the spent thing into her mouth again, Mabel nearly leapt from the bush in disbelief, but she seemed only to be cleaning the mutual mess in the way she knew Dipper liked best.
Dipper fixed his belt into place before dropping down against the sturdy aspen, still panting from their hasty rut, inviting Pacifica to join him by reaching out with his hand. She knelt to the ground and crawled into his embrace, face still numb from the loss of sensation that came when she did. Still though, she gratefully snuggled with him where they made love, a sight that made Mabel's heart melt. And she eagerly listened when Pacifica spoke.
"Dipper, I think… I don't know what I would do without you now."
"What do you mean?" He asked casually.
"Oh my god." Mabel's thoughts blared in her mind. "Don't mess this up!"
"I mean… Dipper, I think I…"
Perhaps at last catching her drift, perhaps just thinking he knew what she was going to say and acting on his own feelings, Dipper tilted his head and gently took her by the chin, pressing his lips to hers.
"I… think I love you, Dipper Pines."
"I think I love you too, Pacifica Northwest."
"Oh my god! Yes!"
"But." She whispered as her head took to resting on his shoulder. "What do we do? You're only here for the summer, and then what?"
"What if…?"
Mabel leaned forward, excited and scared about what might happen next. She had thought about this relentlessly for years now, wondering who in the great green world might be even a remotely good fit for her brother. Now that he found someone, what would he do next?
"Pacifica…" He took her hand in his, weaving their fingers together. "I think… I want to be with you for the summer. And then the fall. And then all the way to next summer. Pacifica… what if I made Gravity Falls my new home?"
"What?" Pacifica gasped and sat up straight. "You would do that…?"
"Would you, bro-bro?" Mabel asked as her eyes watered, from shock or joy she couldn't tell.
Dipper smiled and kissed her again before answering.
"For you, to be with you, I would. No matter where."
Pacifica smiled, and with a chuckle and fighting back overwhelming waves of tears Pacifica lunged forward and clutched him tight in her arms. Dipper held her there, eyes closed, lips curled in satisfaction of the deepest sort. Mabel wiped her own tears from her eyes as she crawled away from the scene. When she was comfortable with the distance between them, she stood and began to walk. Her whole body felt numb, every cell struck simultaneously by that bolt of lightning, but she could feel she was smiling.
"For you, to be with you, I would. No matter where."
"Dipper, you big softy." Mabel said with a laugh and a sniffle, playing the words back again and again in her fevered mind. "You could've told me that's what was so important!"
Everything was so clear now; everything he did was in perfect perspective, and in knowing this, Mabel found herself cheerful again. Every bird that sang overhead helped her lift her head high. Yes sire, everything was right in the world. Well, almost everything… Mabel's jaunty stroll home was halted immediately as a thought blitzed through her brain, followed quickly by another.
"Wait…" She said out loud in disbelief. "Did I seriously get off watching my own brother? Eww. Eww! Wait, wait, wait! Did he really get to home plate before me?!"