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"We shouldn't do this," Sonic tries to say between kisses, pretending that he still earns the right to play the mature, responsible older brother role in a situation like this. "I mean, you're– y'know! And I'm–"
The words die in his throat as Nine grinds his crotch against his, forcing a moan out of the hedgehog. Nine swallows this down with ease, slipping his tongue into Sonic's mouth without hesitation. The fox clearly isn't experienced, but he's eager enough that it cancels out most of Sonic's apprehension. Most of it.
He tries to protest. Sonic swears he does. He hadn't meant to lead Nine on, but one thing had led to another and he'd found himself pressing Nine against the wall of the kit's workshop.
"Don't lie to me," Nine huffs, glaring daggers at Sonic. "I've seen the way you look at me. You're not nearly as good as hiding it as you think you are."
"I, uh," he murmurs. "I don't know what you're talking about."
"You were the one that came onto me." Nine wraps his tails around Sonic's back, keeping the hedgehog's body held against his. His expression is dark, sultry in a way that Sonic can't ignore, no matter how hard he tries to get himself to run away before this escalates any further. "Or are you going to keep acting like I'm some innocent kid you need to keep babying."
"You are a kid."
"As are you. At least I can hold my own."
Sonic wants to argue that he's more than capable of holding his own. He's known as a hero back at home for a reason. He's fought more enemies than most mobians would be able to boast. At the same time, he reminds himself that he'd likely be dead without Nine's help. New Yoke City is nothing like Green Hill. He's out of his depth here, and Nine knows this.
It's the same back at home. He's more than capable of fighting by himself, but he's infinitely more powerful when Tails is fighting alongside him. Tails is the brain, and Sonic is the brawn. That's how it's always been ever since he first took the kit in.
Nine pulls Sonic back in. His hands travel up to Sonic's waist, gloved paws holding onto him more intimately than Tails ever has.
"Focus," Nine mutters. "You started this. If you're not gonna make it worth my time, then I'll just kick you out onto the streets again. I'm sure the Chaos Council would love seeing you again."
The worst thing, Sonic thinks, is that he knows Nine is being hyperbolic. He's snarky and wary of everyone around him, including Sonic, but there are still sparks of the little brother that Sonic practically raised in his New Yoke counterpart. It draws him to Nine, as he chases those remnants in the warmth of the young kit's mouth.
He can't bring his hands up to Nine's tails in the same way he does for his little brother, so he instinctively pivots. Sonic braces his hands on Nine's ass, fingers trailing to the patch of fur below his two legitimate tails.
Nine moans into his mouth. Bingo. It's one of Tails's most sensitive spots, and Sonic has committed it to memory as a place his hands aren't allowed to wander to. With Nine, those inhibitors should still exist, but the fox is panting against him, grinding his body against Sonic's. He chases with the same franticness, protesting weakly to maintain the illusion of responsibility.
He's spent years imagining what Tails would taste like. The taste of mints is completely absent from Nine's mouth, but Sonic can just about pinpoint the faint traces of instant coffee on the kit's tongue.
"I don't know if I can give you what you want," Sonic murmurs.
"You don't know what I want," Nine hisses back. "You won't even be honest about what you want. It's pathetic."
Sonic sighs, as Nine starts to get more handsy with him. He palms at Sonic's crotch, not waiting for permission as he wraps his gloved hand around his cock.
"It's not like that," he argues weakly. Nine is surprisingly good with his hands. Sonic feels just as intrigued by this fact, as much as it concerns him as well. "This isn't right. You're so young."
"Like that's what your problem with all of this is," Nine chuckles. He swipes his thumb over Sonic's slit, pulling a groan out of the hedgehog's mouth. "Hey. Do you sleep around with your version of me?"
Sonic shakes his head. "I– of course I don't. He's my little brother."
"Ah, sure. You just think about fucking him, then," Nine concludes. Hearing something so lewd coming from the mouth of someone that looks and sounds like Tails makes his cock twitch in Nine's grasp. The kit grins, amused to know he's right on the mark. "You're pathetic," he repeats.
He knows that better than anyone. He's tried to act normal around Tails for ages. The young kit is his little brother in everything but blood. Sonic was just a kid when he found the fox, but he'd taken him in anyway. It was only supposed to be temporary, but they'd both grown attached…and then, inevitably, Sonic had grown attached to the point of no return.
Nine isn't his little brother, but he might as well be. Sonic's been clinging onto him like he is. He trusts Nine unendingly, because he trusts Tails unendingly.
This doesn't stop him from moving his hand down, cupping the kit's ass.
"Shut up," he mutters. "Stop making fun of me."
"You make it so easy."
When Sonic's finger ghosts Nine's entrance, the fox moans. The hand around his cock stills, as Nine is visibly caught off-guard. Like Tails, he tries to hold himself up as a mobian that's more mature than his age, though he's far more peristent about the matter than Tails. He acts like his independence and isolation from society make him older and wiser than Sonic.
He might be right on the wiser bit, but as Sonic presses a digit into the kit, Nine latches onto him, whining needily in his ear. He's still a little thing, really, despite how big he talks.
Sonic wants to ask if he's done this before, whether it's by himself or with some stranger in New Yoke City, but he holds his tongue. He doesn't feel privy to the details of Nine's life if it's the first…and he refuses to entertain the latter. Nine's so little. He shouldn't be sleeping around. He should be building things and letting his imagination roam free, all whilst his big brother keeps him safe.
He reminds himself that Nine didn't have anyone else. He's been so lonely for so long. Nine's latched on as much as Sonic's been doing to him, seeking for something they've both been desperately lacking.
"Oh, Gaia," Nine chokes out, arching his back against the wall. The kit feels so tight around his finger, squeezing him hard. Sonic has half a mind to pause, wondering if he's genuinely hurting Nine, but he finds Nine clutching onto him even harder. "Don't stop– please. I'll never forgive you if you do."
He would never deny a request from his little brother, though, Sonic hadn't wanted to stop regardless. His libido had long since won the race against his shifty moral compass. He's already in too deep, and Nine's practically begging him to keep going. What else is he supposed to do?
"Heard you loud and clear," Sonic hums. He presses another digit inside of Nine, watching in awe as the kit's tight hole stretches to accommodate him. Nine hisses, and Sonic instinctively finds himself cooing in his ear. "It's alright, buddy. You're taking me so well."
"I– s-shut the fuck up," Nine curses. "Don't say stuff like that. I– I can't take it. I'm not…"
Nine trails off. Sonic can't say he gets it, so he responds in the only way he knows how. He spreads his fingers inside of Nine, smiling to himself as Nine lets out a string of moaned curses in his ear.
"There you go," he whispers. He presses a kiss to the fox's neck, relishing in how quickly Nine gives him access to his body. His neck is just as sensitive as Tails's, if not slightly more. When his teeth graze the fur of his neck, Nine practically keens, tightening around his fingers.
"Sonic," Nine calls out to him. Before Sonic can even consider slowing down, the fox is leaning in again. "Kiss me again?"
Fuck. He hadn't imagined Nine could sound so meek. His hands grip onto the fur on Sonic's waist, clutching onto his desperately. Sonic doesn't intend to deny him anything.
He leans forward, with Nine quickly meeting him halfway. The kiss just as frantic as before, if not far messier this time around. Nine's clearly a hands-on learner, just like his Green Hill counterpart, for he seems to be somewhat more practiced as he kisses Sonic open-mouthed.
Nine's such a small thing that Sonic doesn't know if he'll be able to fit a third finger inside of him, let alone his cock, but giving up isn't in his dictionary. He's thankful that the kit only reacts once he presses his fingers in deeper, stretching his hole and forcing a sharp hiss out of Nine.
"Easy," Sonic finds himself whispering. "I think I know what I'm doing."
"I– you think?!" Nine squirms against him. At the same time, Sonic moves his digits, trying to recall experiences with past flings. He knows he shouldn't be thinking about other people when he's with Nine, but it's for a good cause, he swears.
"Relax. It should be here, just…"
"I swear to Gaia, if you're actually some stupid virgin just wasting my time, then I–"
Nine cuts himself off with a loud cry, throwing his head back against the wall. For the second time today, Sonic applauds himself on the back. Bingo. "Found it," he hums, pressing against the same spot inside of Nine.
It's hard to focus when Nine's whining and panting against his lips, but Sonic endeavors to do whatever it takes to make the fox cry out like that again for him. He's a lot less shameful than he'd imagined Tails to be, but Nine is still reserved in the sounds he's making, as if actively trying to restrain himself.
It's driving him insane. As he fucks the kit open with his digits, Sonic ruts against Nine, pressing his small frame against the wall. He moans hot air against Nine's lips, as he lets his forehead rests against Nine's.
"More," Nine breathes. "M-more, please."
"I need you to be sure."
"Wh– I know I'm sure! I, ah– I told you not to stop, asshole!" Nine reminds him, shuddering as Sonic continues to scissor his digits inside of him, honing in on the spot that makes Nine cry out his name the loudest. "What– do you need me to beg like your Miles does?"
Sonic grits his teeth. He hadn't even asked for Nine's full name – of course he's also called Miles, just like Tails. Hearing the name come out of the kit in front of him entices Sonic, just as much as it makes him feel uneasy too.
"Don't," he says.
"Does he call you big brother? Does he have some sort of gross, affectionate name for you or something?" Sonic doesn't respond, but Nine seems to understand all the same. "He just dotes on you, then. Gross. Is that seriously all it takes–?"
"I said don't."
Nine chuckles, throwing him a lazy grin. "If you're gonna take it out on me, be quick about it. You've kept me waiting for so long already," he chides. "Bet you wouldn't keep your Miles waiting this long. He's been making you wait to fuck him, right?"
The mental image of Tails pressed up against his workshop back in Green Hill crosses Sonic's mind. He envisions Tails's blue eyes boring into him, blinking up at him, asking him for "more" in the same voice Nine does.
Sonic pulls his fingers out, eliciting a dejected whine out of Nine in protest. Before the kit can start laying in on him, Sonic flips Nine around in one swift motion, pressing the kit's chest against the wall of his workshop.
"Sonic–"
Nine spreads his legs open without any prompting. It's definitely an invitation.
If Nine is asking for it, he shouldn't feel bad. He's just doing what any older brother would do, he tells himself.
"Sorry for making you wait," he says. "I don't know if I'll be able to hold myself back."
"Don't," Nine hisses, as if it's a threat. At the same time, Sonic guides his tip into the trembling kit.
He's thankful he fucked Nine open with his fingers because the tightness that overwhelms Sonic as he pushes deeper in is like nothing he's experienced before. A moan rips out of Nine's throat, loud and taken aback.
The kit is impossibly tight, clenching around him like a vice. He's such a small thing, young and clearly not as experienced as he's been pretending to be, and Sonic thinks he might genuinely break Nine if he pushes all the way inside. Nine's filthy moans, verging on sobs, keep him going.
"Easy," Sonic murmurs. He's not used to going slow for anyone or anything, but he takes a moment to relish Nine's heat engulfing his cock.
"Oh, fuck–" Nine gasps. His tails swish around clear excitement and anticipation, as he scrambles to place his hands on the wall. "Fuck, you're–"
"Too much?"
"Like hell it is," he hisses, rage flashing in the blue eyes Sonic had grown so used to seeking solace and comfort in back home. His voice sounds wrecked, but he's still braving it, craning his neck to look back at Sonic with steadfast determination. "Move. Hurry."
"Nine–"
"I can take it. Just– please. Stop holding back," Nine grits out. "I'm not your Miles. You don't need to hold back with me. Fuck me already."
Something inside of Sonic snaps at that. He grabs hold of Nine's hips, pistoning into him like he's been dreaming about doing to his little brother for years. He gives Nine exactly what he wants, fucking him hard, deep and fast. He's known as the fastest mobian alive for a reason, and he intends for Nine to find out exactly why.
Nine's entire body arches up. "Yeah," he gasps. "Keep going. Just like that, ah–!"
He can feel the fox tightening around him, clenching around him as if refusing to let Sonic go. Little brothers are just like that, Sonic realizes, for they learn how to play their older brothers and push their buttons effectively. Tails had never been much of a brat, but he's always been clingy . Sonic knows this, because he gives Tails plenty of reasons to be clingy. That's just how he's always been.
And now he's seeing those traits for himself projected onto Nine, as the kit keeps his eyes fixated onto him as Sonic continues to drive his cock into his heat.
"You feel so good, bud," Sonic sighs. "Gaia, I'm so sorry…"
He leans in, seeking out his little brother's lips once again. Every kiss they've shared so far has been messy and desperate, frantically searching for something they'd both been craving for so long in each other's bodies. This kiss is no different.
Nine kisses him back as if the kit's life depends on it. Sonic's hands are all over him, reaching down to jerk Nine's weeping cock between his trembling legs.
"Please." Nine doesn't elaborate, but Sonic knows what he's begging for. His voice cracks, tears welling up in the fox's eyes. He hates to see his little brother cry. Sonic would move the earth if it would make his little brother happy.
"I'm close," he pants against Nine's mouth. "I'm gonna–
"Do it," Nine urges, desperately.
Sonic tries to grasp onto what little self-restraint he still has. "Buddy, I– you know I can't," Sonic tries to reason with him. "I can't– not inside of you. I need to pull out."
"Don't. I don't want you to."
Nine's neediness, as raw and unfettered as it is at a time like this, reminds him far too much of Tails for his own comfort. He knows he has to be the worst older brother in the world already by a longshot. If he holds back and doesn't blow a load inside the kit that resembles his little brother (or, who might as well be his little brother, at this point) then maybe he'll still have something to salvage.
But, if there's anything Sonic has learnt after having Miles for a little brother, it's that the fox is insanely crafty and quick-witted.
Nine wraps his tails around Sonic's back, effectively holding the hedgehog in place. He can move forwards and backwards, but there's no space for him to safely pull out.
He's trapped inside the kit.
"Nine," Sonic groans, his tone shifting between frustrated and aroused. "I can't. Please– you know this is wrong."
"You're the one that came onto me," Nine whispers, hiccuping as Sonic continues to fuck into him. "You keep saying you need me– that– that you care about me."
"I do care about you." Sonic fears that he cares too much, to the point it's maddening. His love had become something filthy, something far more perverse than the brotherly bond he claims to foster.
As if knowing this, Nine says, "then don't go. You can't go."
"Nine–"
"Stay…please?" The kit begs, his voice sickly sweet and desperate. "If you really do care about me, you'll stay. We're– we're family, right? Please, Sonic–"
He hates how that's all it takes: the verbal reminder that they're family. He finishes with a string of curses, burying deep enough inside the kit that he swears he feels himself bulge in Nine's stomach.
Nine follows soon after, clenching tightly around his cock. Sonic's name leaves his lips, repeated over and over like a mantra, begging his older brother to stay. His tails, both robotic and real, wrap around Sonic's back tightly, keeping the two of them forcibly linked together.
For a long moment, neither of them move.
Sonic can't remember the last time he had to stop and take a moment. He's lost count of the amount of things he's missed by letting life fly by, refusing to slow down for even a moment. Now though, as he tries to regain his breath, he's left with no choice but to pause and take in the reality of what he'd just done – what he and Nine had just done.
There's no way he can face Tails again. Fuck, there's no way he can face Nine again.
He'll have to go back to living the Nomad life once Green Hill gets restored. He's been outrunning his problems for as long as he can remember, channelling his stress and frustrations on Eggman's badniks instead of forcing himself to confront anything. He'll just have to do the same this time as well…for the rest of his life, he concludes.
He's fucked things with his little brother back home, and the little brother he'd finally found and sworn to protect in New Yoke City. Humorlessly, he wonders if there are any other Tails variants out there in the Shatterspace he has left to salvage anything with.
"You're thinking too hard," Nine mumbles, forcing him out of his thoughts.
"Sorry."
"No you're not." Nine's grasp on him loosens, but he keeps his tails exactly where they are. Sonic makes no attempt to move or run away, despite himself. His expression grows softer, vulnerable, as he repeats in a whisper, "stay."
"I wasn't thinking about going anywhere, bud," he tells him. It's a lie. Nine is his little brother; he's sure the fox knows that Sonic is being dishonest, just as much as he knows Sonic can't bring himself to actually leave either. The Hero of Green Hill is more of a coward then he'd ever admit to anyone, especially his precious little sibling.
Nine leans forward, burying his face in the crook of Sonic's neck.
"Mine," he mutters. "You're mine. So you can't leave. I'll never, ever forgive you if you do."
"Yeah," Sonic finds himself agreeing. "I'm not going anywhere, Nine."
He brings his hand up to stroke the fox's head, gently patting yellow fur. It's not as fluffy or as maintained as Tails's, but it's unmistakenly his little brother regardless.
When Nine purrs at his touch, burying himself further in the warmth of Sonic's neck, it dawns on Sonic that he's fucked no matter what he does. He got what he'd always wanted, selfishly, and he can tell the same goes for Nine. Sonic can't go back home, and Nine hardly seems to regard New Yoke City as any sort of home to begin with, but at least they have each other.
He wonders if that'll be enough.