The first time was an accident. Vi should have never let it go so far. It started out innocent enough. Trying to keep up with her big sister's ever-growing strength and fighting skills, Powder had instigated a wrestling match. Vi didn't go easy, especially at that age, and Powder didn't either. Vi had the advantage in size so she didn't complain when Powder punched, kicked, and thrashed like a mad animal. Try as she might, Powder could never one up her in a wrestling match. The brat would yell like she had lost her mind, charging at Vi, only to go crashing to her back again and again, wincing from the impact of her trim frame against the large, flat training mat, ragged at its edges. No matter what, she got back up again. Once in a while, she actually managed to one up and bruise Vi, but every sparring session concluded with more-or-less the same result.
It wasn't just for play, it was also a kind of training. With how often they fought other kids in the streets, Powder really needed to feel like she was held down, trapped, so she could actually learn how to escape the grip of someone larger. Although.. sometimes escaping would never be an option.
Vi enjoyed it, probably more than she should have, even before it happened, an easy way of taking out all her pent-up aggression. Powder had an infinite battery; the brat just kept coming back for more anytime Vi would try to make her surrender or leave. Pinning her down and listening to her squeal was supremely satisfying to the older sister, even if Powder gave in, she'd still torment the girl in some fashion.
So, she and Powder were a pile of pale, squirming, tangled limbs- Vi on top, holding Powder down by her tiny wrists. Before that day nothing had ever happened like it. If Vi had noticed the moment it started, perhaps everything would be different. As Vi flipped Powder onto her back, crushing the girl's body against her, somehow the younger girl's knee slipped casually between Vi's legs, pressing against her crotch near her right thigh. The wrestling continued unhindered, Vi grinning victoriously.
"Come on brat, give it up!" Vi laughed loudly, "I haven't got all day to hold you down!"
Vi expected a response, but as Powder writhed beneath her, she was silent for a long moment. Vi stared in confusion, and found the younger girl red-faced, eyes closed, biting her bottom lip and emitting tiny moans. Struck dumb, as if by lightning, Vi didn't say anything at all, her dark eyebrows low on her already chiseled young face. Powder whimpered like a tiny critter, her delicate frame shivering.
Staring into her eyes was hypnotic, the heat coming from those orbs near-irresistible.
"V-Vi…" Powder whispered, hiding her face in her hands but still rocking her slim hips up, her shirt pushed further back with every motion, revealing the flat expanse of her belly, and the bottoms of her delicate breasts and nipples. At first, only a dull warning buzzed in Vi's mind, but it soon morphed and melted into a paper-thin pink hymn that made her spine shiver, calling out to a part of Vi she'd never known. Vi felt a horrible throb. In a moment, reality came crashing into her body, a forest fire and a flood in her belly, crotch, and ears. It seemed like all the blood in her body rushed south, and she became terribly aware that the organ which had pestered her all her life in the worst of times was doing exactly that now.
Vi was stiff as can be and pressed against her younger sister's crotch, and that damn girl was not upset, or ashamed, or frightened, or even confused. In fact, on her own volition, she'd started rubbing herself on Vi's dick like she knew exactly what she was doing. Vi tried to move away, but those long, gangling limbs wrapped around her ass. Powder hugged her around her chest at the same time, burying her face in Vi's neck and gasping.
"Powder, shit, stop moving" Vi groaned. Beneath her on the stiff old mat, the blue-haired brat refused to do as bid. She was in her own world, her face crimson as she rocked ever harder, ever faster, against Vi. The girl was using her like she was a tool. "H-Hey, I said stop!"
"Don't want to~" Powder shot back, breathing heavily, flushed face a delight to behold even as it tortured Vi that her sister was looking at her like this, that dark glint in the recesses of that innocent gaze...
"W-Where did… you learn this?" Vi finally managed to get out through grit teeth. Powder was persistent. She tried not to buck her hips, but that was hard to do when she couldn't remember how to breathe half the time. She clutched onto the edge of the training mat to cope, but it did little to help. Their red-hot parts were rubbing together with nothing but thin layers of cloth separating them. Even through that cloth, Vi could feel how hot Powder was down there. Certainly more excited than the other girls that Vi experimented with. Her head buzzed with confusion, excitement, fear- that and more were chasing her around in her own head, whipped on by Powder's eager ministrations.
There was something hidden behind the girl's strange gaze and smile. "Hehe, I know how to win nowwww!" Her breathless, moaned giggle was beyond mischievous. At first, only a dull warning had buzzed in her mind, but it soon morphed and melted into a paper-thin pink hymn that made her spine shiver, calling out to a part of Vi she'd never known.
Vi forgot how to think. She was mesmerized by the way Powder was shaking her hips, back, and forth, and up and down… her breath hitched, her head getting foggy - almost dizzy. Only when her body reacted, hips jerking slightly did she fully realize what was happening and she snapped back into reality, eyes wide. No, no more, this had already become an emergency situation, she could not make it worse. The pink-haired girl grabbed her sister's legs, planning to rip them off, and force the girl away. After a fierce scolding, this would never happen again, but as soon as she started pulling away Powder tackled her.
The attack caught Vi off guard. She stumbled backwards, brawler's instinct kicking in. She grabbed Powder around the belly, and couldn't help but laugh at the girls surprised "oof" as she forced her back onto the ground, on top once again. They froze there, just like that, the air hot, sweaty, seeming to weigh a billion pounds. Her crotch pressed more directly against Powders now, slotted together in the position of two dogs about to mate. In this position, Vi could easily jump back and leave the room, and the two could forget it ever happened.
Instead, panting heavily, coated with sweat, the blue-eyed pinkette merely stared at her sister's back. The girl looked back over her shoulder, and with a wicked smile, she pulled the bottom of her shirt up again, showing Vi her entire naked chest. "Don't you want to-to make me warm-shiver all over?"
It'd been such a filthy, yet innocent, request. Vi could have said no, Instead, her mouth worked on its own. "Y-Yes…" Vi said it so pathetically, practically whimpering it.
That was the exact moment everything changed. Powder's eyes narrowed to half-lid, her sweet mouth taking on a sultry, knowing curl. She'd just dominated her older sister, overpowered her stronger will through temptation, through mere words... even if she didn't know it, and didn't recognize the feeling that budded in her, just yet. The girl violently shivered, and her nipples grew visibly taut. That was what drove Vi into action. She pulled the girls shirt up, revealed her chest, and took one swollen nub in her mouth.
She sucked and licked it, eagerly, enjoying the weak salty taste on her sister's skin. Powder expressed her approval with more pathetic mewls, sticking her chest forward with glee. Vi stared in terror and fascination at those pale swells, the smile demanding more, the eyes burning for her.
Powder's bottom lips quivered. "I-I really need it, so…"
The pink-haired older girl panted heavily, wiping at the sweat on her skin, shaking her head like a rabid dog. Try as she might, the impulse to keep going wouldn't go away. It just felt too good, and Powder wouldn't stop moving her body in that teasing way that felt just right. Vi couldn't tell her to stop, didn't want to. She bit her tongue, closed her eyes, and rocked into her sister.
Powder whimpered pathetically, wrapping her arms around Vi and hugging her, her face happy as can be. She humped Vi's crotch like an eager dog, tongue stuck out and all, her blue hair messy around her face. "V-Vi… you're so cute…" Powder whispered, gazing at her older sister's reddened, pleasure filled expression. "Move your hips more… feel good with me~"
"C-cute?! What, why would y-you… mmmhh!" Powder's hips picked up the pace, like she was trying to grind Vi's dick into dust. Those huge eyes slid closed. Vi immediately knew what was happening, something seemed to shift in the air. Powder completely lost it, squealing like an adorable piglet. Her head fell back as she cried out "V-Vi, it feels so good, s-so good!"
Powder's face was an adorable, sensual mutation of its former self. The girl's tongue was stuck out, as if she was waiting for a kiss, her hair all over the place, eyes dark with lust. The girl was toying with her own clit while Vi humped her ass, and the girl was rubbing it vigorously with an intense, well-practiced motion. It made Vi's blood rush south seeing how much of a pleasure-chaser Powder was, like this came natural to her. "L-Love you Vi," Powder whispered.
Vi's jaw went slack and her eyes rolled into the back of her head. Her mind went completely blank as she felt the rush of something forbidden to take over. Then it happened.
There was a definitive "OH!" from above Powder, the younger girl felt her big sis's orgasm through their layers of clothing. Even without that telltale throbbing, anyone could see Vi shivering and seizing from cumming. Powder gasped as something hot and wet spread across her butt.
The second it was over Vi was relieved… then the panic and guilt seeped in. She'd seriously just messed up. As in, really bad. Powder was still grinding into Vi's crotch with a desperation she was barely old enough to understand, and even worse, Vi found it arousing even now. The way Powder's mouth was hanging open, her closed eyes, and her hungrily jerking little hips… they were so damn cute.
Vi wanted to let her continue. Wanted to watch her little sister orgasm again and again, and the shuddering of Powder's sweet slender, body made it clear she was close to that point.
But she couldn't let that happen. Vi had to stop this now that she was in the right mindset to do so. As the big sister, she had to before they could never recover - if it wasn't already too late.
"Powder, you need to stop now," Vi managed to choke out. But the girl didn't seem to hear her; she just kept slamming her hips back and forth, panting and mewling. "NOW!"
"B-Big sis! Mmmhh, mmm, mmI'm… I'm so… s-something's going to happen!" Her words became slurred, incoherent, her hips thrashing back and forth, big eyes shining with utter devotion. "V-Viii!"
Vi had another rush of sobriety. "Powder, WAIT! Please wait-oh shit," She put her hands around her younger sister's hips and tried to pull herself away, but the legs wrapped around her butt only tightened. Vi couldn't find the strength to disengage anymore right now than she had before. Her head was foggy with the hot daze of arousal. So many different parts of her wanted to see Powder's face when she orgasmed. She knew it was wrong, that didn't banish the excitement in her body. If anything, that just made it worse.
"N-No, no, I won't stop. I like it - it feels good! B-big sis ! " Powder began to shriek so loud Vi put her hands over the girls mouth, worried someone would hear them. Apparently getting shut up by force turned Powder on, the hunger in her eyes seemed to blaze up, her grinding against Vi became even quicker, more forceful.
Then it happened. The brat began to cum . Vi watched the orgasm rip through Powder. Her thighs spread as wide as they could go, her heart-shaped little face a mask of total bliss, tears of ecstasy starting to roll from her beautiful eyes. Her mouth dropped open, the sounds sealed away by Vi's palm and fingers, but not all of them. She was squeaking, pleasure-tears dripping down her cheeks against Vi's fingers.
Powder stared at her with complete gratitude.. Desire.. Almost a sense of wonder. Was this her first orgasm? Vi felt like a god with this brat positively glowing beneath her, smiling in a silly, well-fucked way. When Powder began to lap at the hand still covering her mouth, tracing her tongue against the digits, Vi shuddered violently and imagined that dexterous tongue in other places.
Powder's eyes seemed to whisper and cry out, ' Big sis, make me feel even better.' Then, Powder twiddled her fingers, seeming almost bashful as she said something Vi could have never expected. "W-when you marry me, we'll do this every day. Kay?"
Vi really lost it after that. In a newfound frenzy, she reached around, rubbing the sweet spot where she knew Powder's clit was as she ground her swollen crotch against her sister's pert, little bottom. "Fuck, Powder, seriously? I- Is this really happening? W-what am I doing, oh fuck, why can't I stop?"
They'd both cum but it wasn't nearly enough. This forbidden pleasure was the ultimate satisfaction. Fantasies of her little sister were being painted inside her mind with every thrust of her hips. Her grinding grew more frenzied and impatient, hurried, short bursts of hurried squirming as opposed to the steady imitation of fucking they'd naturally been drawn to before. Her head was stuffed full of moans and Powder's cute, turned-on face. Over and over, she heard her name. A second orgasm was burning in her belly, Vi wanted to put her cum in other places.
"I-I love you big sis," Powder murmured against her hand, words barely coherent, "Vi, Vi-"
"VI!"
The pink-haired brawler was startled out of her reverie. Caitlyn was shaking her, almost violently. "You were calling out 'Powder' in your sleep, my love. I figured I'd wake you up."
Vi blinked, swallowing hard. The trip to the hospital was still happening around her, the transport to the area steady but slow. Caitlyn was still by her side. As the memory of that dream, which forever haunted, Vi cringed. She buried her face in her hands, breathing heavily. What the hell was she day-dreaming about, losing herself in such a horrible, disgraceful memory. Disgraceful, shameful, fucked up thought it was, Vi felt a tug between her thighs.
How could she? How could she be thinking about this when..?
"It's going to be alright, Vi. The doctor said Jinx is totally rehabilitated."
Vi rubbed away the start of a headache, shaking her head in aggravation. "Yeah, as long as she takes medicine for the rest of her life. Those damn glimmer pills."
Her fiance's expression grew grim. "Come now, Vi, you need to show support for your sister and her health routine otherwise she might not honor it herself. Glimmer.. It's not something that can ever truly be purged from the system. It's better that she microdoses and thrives than the alternative. Jinx has an opportunity to-"
"Call her by her real name- Powder."
Caitlyn's warm hand enclosed hers, and that just made it worse. "Vi, I know it upsets you, but that is the name that she chose for herself during the extent of her treatment. Some part of her let Powder go, she's Jinx. You have to accept that. The doctor said-"
"That if I try to appeal to that child in her it might make her loop again, even with the meds. Yeah, I remember. I was there too."
Caitlyn did not flinch, did not pull away, did not even seem hurt by Vi's barbed, cold words. Try as she might to push the sharpshooter away, Cait did not relent in her love. Instead, she wrapped her arms around one of Vi's, enfolding har partner's muscular, tattooed limb in her chest and snuggling close. Her perfume was sweet. Vi leaned against her in return. There was nothing but love in her girlfriend's face, like staring into the sun.
"Vi.. Jinx is coming home," Caitlyn whispered, "and I know that is scary.. But I'll always be here for you. Every step of the way.
In a sick way Vi wished that Jinx could just stay where she was, institutionalized forever. She was afraid of the secret that existed between them, even before Silco. Caitlyn being around was part of what Vi was afraid of.. Mind in disarray, Vi slowly fell into a sleep against Cait's side. The boat would bring them where they needed to be, the island facility where "Jinx" was currently held. She could rest. Everything would work out. It had to.