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He was hovering beside her so closely, his chest leaning flat against her shoulder, and she can feel his warmth. She breathe in his smell and her mind just went blank, her brother’s voice turning into a droning buzz, suddenly aware of how wonderfully his lips moved as he spoke, the way his jaw tensed whenever his mouth opened, and how his adam’s apple danced with every syllable that escaped him, his words a wonderful tune in her ears as she was lost in their harmony, as much as she was lost in his eyes that had the look of focus she always admired. It wouldn’t be her fault now would it, if she just caught her brother’s lips with hers then and there, enveloping his mouth with her own, fully knowing that even though their door was closed, their parents were downstairs, and they could barge in any moment, but for some damn odd reason that excited her. Just a quick smooch, that’s it and it’ll satisfy her- or so she says to herself. She leaned in, slowly inching her face closer, as her twin was unaware of the predator closing in on her prey as he explained their homework to her.
“You cross multiply these variables over here, inversing them so that-“ Dipper’s explanation was cut short when he found his mouth engulfed by a warm, moist and supple pair of lips, then tongue that prodded and slid along his mouth, wanting entry deeper within it. His eyes widened as he saw Mabel’s face an inch away from her, her delectable luscious lips supplanted on his, her eyes softly closed, her tiny whimpers pleading, almost begging for Dipper to return and deepen the kiss. She tasted exquisite, her smell was intoxicating, and her tender curvy body plush, fully encroached against his, her arms suddenly wrapping around his neck, her fingers running through his scalp, sending electrifying shivers through his spine as his lips did hers.
He quickly got over his initial surprise, granting his twin sister her wish and giving in to her command. He leaned further into her, deepening their kiss, parting his mouth to allow her entry, their tongues finally meeting, jousting, clashing, as their lips nibbled at each other hungrily, both gasping for air on the precious microseconds they would part to breath, moaning and whimpering against each others lips. Dipper slid his arms under her sweater, caressing his fingers on her smooth warm skin, along the curves of her waist and back, earning him a lust filled groan that sounded like music to his ears. He wrapped her tightly in his arms, pulling her closer to him if it were possible, wanting and needing more of her warmth and touch.
They explored each other’s mouths for a while, not minding their unfinished homework, forgetting the time passing, not caring that their parents were downstairs preparing dinner as they touched each others bodies, passionately kissing, toeing on the throes of their wonderful ecstasy, both curious on how kisses can feel so wonderful and pleasurable yet be so simple. Mabel pulled herself up on Dipper’s lap, swinging her leg on his as she straddled him, earning her a groan from her brother as they deepened their kiss even further. She wiggled her hips, rolling them back and forth, rubbing her groin against her brother's, feeling an incredible warmth encroaching beneath her as lightning bolts of pleasure shot up her spine as she moaned deeply, quietly, her voice a husky whisper.
Dipper moved his hips along her, wanting to further feel her rubbing on him, feeling his organ swelling with heat and a wave of intimate pleasure as he coddled her neck with nibbles and kisses, peppering her face with pecks of his lips, softly biting her ears as he caressed every inch of her skin delightfully, the trickles of his fingers sending pinpricks of electrifying desire inside Mabel’s body.
They would have gone further and deeper in their throes of passion, unfortunately it was cut short, when Mabel heard the familiar stomping of footsteps on the stairs outside her room, signaling one of their parents were coming up to remind them that it was time for dinner. She quickly got up from Dipper’s lap, sitting on her chair beside him, and doing a once over to make herself look presentable and less- engrossed in her brother’s affectionate ministrations. She feigned a cough when she noticed him looking dazed and confused, staring at her and wondering what was wrong, she nudged Dipper’s knee with her own and before he could ask, a knock was heard on the door to her room, and not a moment later, their mother entered, swinging the door abruptly, craning her neck inside.
“Dinner’s ready, kids, why don’t you two take a break? I made lasagna.” She announced, looking at them with slight confusion.
“O-oh- we’re just- just finishing up here, yeah- we’ll be down in a minute, mom, thanks.” Dipper replied nervously, hoping his face wasn’t too red, otherwise there would be questions. His eyes flicked to his sister, relieved to see she was faring better. She put on her best Mabel smile, acting innocently as if they weren’t just sucking face seconds prior.
“Sure thing, momster! We’ll be back down in a jiff’, broseph’s just helping me out with our Algebra.” She replied casually, swinging one arm on her chair’s back rest.
“Alright, come down quick and eat while dinner’s hot.” Their mother scrunched her face, feeling the heat emanating from their room, “and open your windows please, it’s hot enough tonight as it is, don’t want you two getting sick from the heat.” She finished, pulling the door close as she exit their room. Her footsteps ringing through the hallways, fading silently as she got downstairs while the twins listened with bated breath.
They looked at each other, the pounding in their hearts and the nervousness from almost getting caught soon fading away like nothing had happened. They broke into fits of laughter, Mabel giggling and chortling adorably, the twins clutching their stomachs, relief washing over their excitement.
“That was close, broseph. Let’s go down and get dinner and we’ll…continue off where we stopped.” She said the last part teasingly with half-lidded eyes, shooting her brother with a sultry smile.
Dipper’s face turned a shade of pink, grabbing the collar of his shirt, feeling quite sweaty, standing up, “Y-yeah- let’s wait when they’re- y’know, asleep.” He chuckled nervously, holding out a hand which Mabel graciously grabbed. He gave her a quick peck on her lips then her forehead as she stood up. She gave him an affectionate smile, feeling warm and fuzzy inside, returning the kiss, then leading her brother by the hand, swinging the door open.
“Well let’s go then! Can’t keep the ‘rents waiting, last one down washes the dishes!” Mabel let go of her brother's hand and quickly ran down the stairs.
“Hey! That’s not fair! You got a head start!” Dipper grinned and ran right after his sister, stomping down the stairs behind her, knowing full well he’d be cleaning the dishes that night, and he didn’t mind.