Author: prophetbot, gatekat on LJ
Characters: Sunstreaker/Sideswipe/Shimmerfire
Rating: NC-17 for mech/mech/femme
Warnings: Mechsmut, Het, Slash, Twincest, Violence, Sparksex
Description: With Sideswipe fully recovered, he and Sunstreaker are out to set up a prank when they get a most unwelcome visitor.
Notes: Written in the Dathanna de Gray fanverse
Sunny Side Up 5: Challenge and Choice
"You are crazy, you know that?" Sunstreaker hissed at his brother as they snuck through the base, a much more difficult task now that four-fifths of the population were tiny organics prone to reporting their movements to various mechs that shouldn't know.
"And yet here you are instead of curled up with Shimmer," the silver warrior snickered.
The golden mech snorted, though quietly as to not blow their cover. He didn't know why he agreed to these things sometimes. Probably because Sideswipe was always the one on his side whenever Sunstreaker was causing chaos and acting out of line. It was a give and take kind of thing. They each did brig time for something the other got them into, but it was always brig time together.
"That's to make sure you do things right," he confirmed, grabbing the silver frontliner's wrist and yanking him back just as a couple of humans walked past their position. ~Glitch-head. Watch where you're walking. See, this is exactly what I'm talking about.~
~Then it's good you're along,~ Sideswipe gave him a cheeky, unrepentant grin. ~Come on, we're almost there.~
Sunstreaker walked as close to Sideswipe as he could without touching him, optics vigilant as they neared their destination. ~Just be glad I thought your idea was amusing,~ he quipped. ~Otherwise I'd try to talk you out of it. To think, I could actually be painting you right now. Hm.~
~We'll get back to that, promise,~ Sideswipe crooned at him. ~There.~ He pointed to the tank used to filter water for human use. ~We just need to get this inside,~ he twisted a pipe-like device between his fingers.
"Sideswipe, Sunstreaker," a deep voice rumbled above them.
Sunstreaker had been so focused on looking out for humans and mechs alike on the ground that the voice certainly managed to startle him. However, instead of showing it he tensed, helm slowly raising to catch the source of the voice and optics narrowing when they did.
"Tread Bolt," he halfway growled, almost in warning. One couldn't just sneak up on the twins and get special treatment.
"Then you should have an idea why I'm here," the translucent flier growled right back, showing his full Seeker heritage for the first time around the pair. Usually he was quietly sneaking around like the cowardly spy he was.
Sunstreaker was tempted to show off his blades, but held back, instead scoffing and keeping a firm gaze on the Seeker. "Why the slag would I know why you're following us around?"
~It's about Shimmer,~ Sideswipe warned him, already tensed as his battle blades unsheathed and locked.
The Seeker's optics narrowed, though if in response to Sunstreaker's words or Sideswipe's combat posture it was impossible to tell.
"Being polite to a grounder is over their head," he hissed, his wings high on his back in a pure threat posture as he hovered over their heads. "Stay away from Shimmerfire. She is mine."
"Did you just tell me to do something?" Sunstreaker snarled, believing he didn't exactly need his blades out to prove he was about to start something if Tread Bolt kept it up. "Go get yourself fragged, Bolt, I don't take orders from you. Besides, I get the feeling she isn't that taken with you. Could've sworn it was otherwise when she was crying my name a few nights ago."
White optics widened and flared, then the stealth Seeker's engines rumbled a deadly warning. "She's a Seeker. You aren't worthy to sire her young, even if you could."
Sunstreaker got a fraction of a nanoklik of warning before Sideswipe snarled and lunged, using the building they had been hiding behind as a launch pad to try and sink his blades into the Autobot Seeker.
He wasn't particularly fond of Tread Bolt, nor was he of any of the other bots, but a low hatred boiled at the statement, and as soon as he felt his brother attack, his blades snapped out from their sheaths and he followed Sideswipe's launching strike, only bouncing higher off the building as to not crash into the silver frontliner.
"Shows what you know, tin trash," Sunstreaker barked in midair.
Tread Bolt rumbled and lifted above their attack range from the short buildings of the human side of the base.
"That was your mistake," the translucent Seeker growled. "You've had your warning, more than I'm required to give. I will not give another."
Sunstreaker wanted to tell Tread Bolt just where he could shove that warning, but focused instead on landing without breaking the concrete below him. "Give me two good reasons not to slit his throat cables while he's recharging," he demanded of his brother.
"You'll have to beat me to it," Sideswipe glowered at the Seeker's retreating form. "Arrogant is one thing, but damnit, she's an Autobot. He doesn't have any right to act like he owns her."
Growling in irritation, the golden mech no longer had the need to watch after Tread Bolt, instead shifting into his alt form and revving his engine.
~I'm sorry, Sides, I don't have the patience for your prank at the moment. I'm going back to Shimmerfire.~
Being told what to do usually brought the opposite out of Sunstreaker.
~I'm with you.~ The silver mech folded into his alt and they raced to the iridescent Seeker's quarters, keeping their sensors primed for the stealth Seeker they both wanted to extinguish at the moment. Shimmerfire inhabited clear-roofed quarters above the enlisted barracks, but they were as large as Prime's thanks to her size. Technically she was an officer already, but the tension with Tread Bolt, who lived above the officer barracks, kept her separate.
Sunstreaker drove silently as well as quickly, aware of his brother right on his bumper. Within minutes, they were upon her door, and he stretched into his base form professionally while he pinged Shimmerfire's private comm link.
::Excuse me, beautiful, but you have two mechs at your door step,:: he mused with a slight smirk, despite how Tread Bolt's warning put him in a sour mood.
Her response was a playful laugh and the door slid open. ::In the wash rack. Did the latest prank get messy?::
Sunstreaker hesitated in his response, stepping through the door even before it opened all the way but glancing back at Sideswipe after he was inside. ::Something like that.::
They heard the water turn off and she stepped into the main room of her quarters, the one that housed everything except her extensive wash rack, still glistening with water to check them out with her own optics.
"You don't look discolored." She cocked her head slightly and stepped closer to them, her wings twitching in uncertainty.
~Should we tell her?~ he asked carefully, appearing to be physically calm and attempting to justify the brief silence as him taking in her after-shower look.
~Yeah, we should. How else to explain our rush here?~ Sideswipe pointed out.
~True.~ Sunstreaker stepped closer into the room, his optics grazing across her perfectly positioned wings.
"We were just given a visit by Tread Bolt," he began, unable to hide the obvious distaste in his voice, "specially to tell us that we were to stay away from you, since, according to him, you belong to him."
Her turbines rumbled, deep and furious, as her wings swept up and a scowl marred her features. "What were his exact words?"
"'Being polite to a grounder is over their head. Stay away from Shimmerfire. She is mine'," Sideswipe repeated, matching the inflections fairly well.
Her engines rumbled again, her wings trembling in constrained fury. "He's claiming the right to court me, but the intention is close enough. Seeker to Autobot isn't always precise."
"We might have tried to attack him," Sunstreaker offered absently, almost proud to admit it. If that gave them any trouble, he could always just point out that Tread Bolt basically started it.
"Good," she rumbled with definite satisfaction. "Any damage done?"
"No, the coward flew out of range," the golden warrior scoffed, wondering just what might have happened had either of the twins gotten their blades into the retreating Seeker. "At any rate, he thinks we're not worthy of you, Miss Shimmer."
Sunstreaker reached out, ghosting his fingertips over her right wing. She pressed into the touch shamelessly, as well as into the strokes to her back that Sideswipe slipped around to deliver.
"That's my choice, not his. He may be a Seeker, but he's not a warrior."
They should have been able to tell by how she appeared to crave the touches they gave her, but Sunstreaker was more cunning than that. "And what is your choice?" he asked almost playfully, drifting the hand not stroking her wing to rest against her slim hip.
"I want a warrior, or two." She grinned down at him before grabbing a head-vent and pulling it back to claim a hot, demanding kiss. "One worthy of siring the next generation."
His mouth plates matched her grin in one of his own, eagerly responding to the kiss with a force that was its own possessiveness. There was nothing like being told to do one thing and completely defying with another, especially when that defiance included a femme to whom he was warming up to more than he had to any other mech - excluding his brother, of course.
"Oh, well, then Tread Bolt has another thing coming," he mused, swiveling backwards on his pede and coaxing both her and his brother after him towards her large berth.
"Yes, he does," she rumbled deeply, a sound they were both learning to equate with arousal as she willingly followed. "Arrogance and entitlement only works when you have the goods to back it up."
Sunstreaker couldn't hold back a laugh, confirming his complete agreement with her statement. "We all know where the goods really are," the golden mech affirmed, reaching for one of her arms so he could drag her down on top of him as soon as he fell back onto the berth.
She caught herself so her greater mass didn't crush down on him as more than a warm, welcome pressure, and assaulted his mouth again. A deep groan of pleasure rumbled from her entire chassis as Sideswipe got his fingers along the leading edge of her wings and rubbed tightly.
Sunstreaker pressed himself chassis to chassis with Shimmerfire, letting the deep vibration of his engine combined with their warmth wring a pleasurable moan out of both of them. He made sure to keep the bond between himself and his brother completely open, sharing every sensation.
The golden warrior shifted his hands, fumbling them over every area under her shimmering armor to fondle the delicate, sensitive wires and circuitry beneath while his glossa tackled hers.
Even though she stood no more chance against the pair of them in the berth than she did on the battlefield, Shimmerfire did her best to get her own fingers under his armor and draw more of those sweet, breathy moans from Sunstreaker's vocalizer.
And she received just that. Sunstreaker became more aroused the more she tampered with him, until a slight hiss indicated that his interface panel covering had moved back, and his spike was suddenly pressing into her stomach armor.
She shivered and rubbed it between them, teasing the sensitive metal briefly before sliding her own panel out of the way.
Sunstreaker's attention was drawn by a jolt of arousal from his brother.
~I like this one,~ the silver warrior rumbled, sharing the image she'd sent him of both warriors deep in her valve as they worked her wings.
~Mm,~ Sunstreaker responded, with a slight tweak of his spike as its erection tightened almost painfully. ~She did say she wanted two warriors, didn't she?~
The golden frontliner tore a hand away from underneath her armor to do just that - rubbing hard and sensual circles along the wing Sideswipe wasn't paying attention to. ~You take her first and I'll join you. Just wanna see the look on your face.~ Sunstreaker smirked.
Shimmerfire arched, pressed her wings opposite directions to encourage the touch, then called out shameless, wordless encouragement when Sideswipe thrust into her valve with a single powerful stroke.
~It's gonna feel so good with you in here, bro,~ Sideswipe panted.
Anticipation shot through the golden frontliner. He braced Shimmerfire with distracting touches to her sensitive wings while he positioned himself alongside his brother's spike, easing himself in halfway before plunging deeper with a jerk of his hips. Then there was no stopping his moans as he set the pace, thrusting deeper.
The roiling bliss from Sideswipe cascaded over the bond to Sunstreaker, and Sunstreaker's ecstasy crashed into Sideswipe. Both thrust, grunted and moaned, one pulling out while the other thrust in to create the most friction in the impossibly tight valve of the Seeker pinned between them.
Shimmerfire shivered and whimpered, her body already on the verge of overload as she squeezed down around the pair. Her chest armor unlocked, but she forced it to remain closed against every instinct clamoring for her to use these warriors for her young. They were strong, fast, agile and deadly. They would make strong Seekerlings. Strong young to rule the sky with her.
Sunstreaker, even over the loud noises they created together, could hear the unlocking of her chest armor, and was nearly surprised to see that she forced it to remain shut. ~She's fighting it,~ he managed to groan, quickening his pace and reaching out to coax Shimmerfire's helm towards him to trap her mouth plates against his.
~She'll never ask you to merge with her,~ Sideswipe grunted what he'd said that first time. ~Respects you enough not to.~
There was something delicate about this closeness and intimacy that Sunstreaker was sharing not only with his brother, but now their ongoing lover that Shimmerfire had become. It went without saying how attached they were becoming, really. Sunstreaker had even done the ultimate jet judo in order to keep her from making one of the biggest mistakes of her young life. And now, in this moment, he almost felt that it was a shame they couldn't share an open bond with her, with how crazy these sensations between the twins were climbing.
Golden fingers slipped between her wing joints, fingering the seam between her back and her most powerful attribute. His spark was pulsing in his chest, and whether it was calling out for Shimmerfire or Sideswipe, he wasn't sure. Perhaps both.
He felt something settle in his brother, but overload caught them both before he could put any name to it.
Shimmerfire cried out into his mouth, her entire frame trembling wildly as their overload and the transfluid pouring into her valve pushed her the last bit into hers.
Sunstreaker muffled his own groans against hers, and as he eased his movements until he was settled within her beside his brother, he pulled his mouth back, giving her lip plates a chaste lick before parting fully. "Slag... Tread Bolt can't beat that," he smirked.
"There's so much he can't beat," she trilled, her accent heavy in her relaxed pleasure.
He leaned his head forward a bit to rest his chin against her shoulder plates, earning him room to press a lingering kiss against his brother's lips as well before finally pulling out of her valve.
"You got that right," Sideswipe purred, resting against her back between her wings before slipping under her left wing to press against his brother. ~You really are starting to like her,~ he murmured happily.
Sunstreaker chuckled lightly, satisfied by his overload, the two bodies he was pressed against, and the ridiculing of Tread Bolt. He thrummed, dimming his optics in a stubborn way when his brother's voice whispered to him within his processor.
~Maybe.~ He avoided answering that fully, instead pressing a kiss to Sideswipe's olfactory sensor, and then another to Shimmerfire's shoulder, almost mischievously.
"He'd better watch out. Next time he might not be able to take off into the sky, mm?"
Shimmerfire's grin was absolutely wicked. "We could get away with that?"
"Probably not," Sunstreaker admitted, though his tone didn't waver. "Never stopped me before. Hence the horrible record." The golden mech nodded his head almost solemnly, but there was a sense of pride as well, one that probably had Sideswipe rolling his optics.
"If you really want to hurt him, you have to make it untraceable." Sideswipe chuckled. "Hence the prankmaster status. Vengeance is sweet."
"Oh, I know you'll be all over that for me, Sides, won't you?" he mused flirtatiously, stroking a hand up Shimmerfire's backstruts. "You don't like him either. I'm just thinking we should get him before he attempts to get us, or whatever his warning entailed."
"Mmm, if we were in Vos, he'd try to kill you, or at least beat you both so badly I couldn't view you as suitable." She trilled happily at the stroking both brothers were giving her. "Here ... I'm not so sure. He is more Autobot than Seeker."
Sunstreaker scoffed. Tread Bolt may have had the advantage in the air, but he was confident in his jet judo, and if he managed to get the Seeker on the ground... well, that was just more in his favor. "Maybe he was just trying to puff out his 'feathers' and make himself look bigger. I just wanted to bash his helm in. It makes no difference to me, really."
"I just wish he'd take the hint that I don't want to breed with him," Shimmerfire grumbled, snuggling against the frontliners. "You'd think this would be enough."
~He's watching,~ Sideswipe silently showed his brother where the stealth fighter was on the roof.
The golden frontliner immediately gave a feral growl, shifting from beneath Shimmerfire and retracting his spike to shut his interface panel. ~If we attempted to reach him, he could just fly away.~
~How about we really piss him off instead?~ Sideswipe grinned, catching his brother's mouth in a kiss. ~Repeat what we did, you against her back,~ he rumbled eagerly. ~And with a spark merge with me. Should really bust his bolts.~
Sunstreaker was still slightly grumbling, but the idea coupled with his brother's connotative mouth settled him down easily. His chassis rumbled in approval, and after attacking Sideswipe's mouth with his own for a klik or two, he shifted his weight under Shimmerfire's wing so he could move to her back.
He realized that it was a very convenient position to molest her wing span, and smirked in his brother's direction while he reached out to rub them tersely. "Ready for a second round?"
"Yes!" she gasped, not quite in surprise as she arched her wings into his hands. Her turbines whirled, her engine rumbled to life and her entire body quivered when Sideswipe added his efforts to his brother's assault on her senses. "Primus, yes!"
"Oh, she wants it," Sunstreaker crooned to his brother, massaging his fingers deep into the areas closest to her wing joints. "We'd better give it to her." His interface panel slid open again once he was in place, and his spike pressurized to end against her valve.
"Wants us badly," Sideswipe agreed as his spike rubbed against his brother's, lining up to take her once more.
"Yes, both of you." Shimmerfire shuddered at the pleasure so temptingly close and grabbed Sideswipe's helm to kiss him with all the heat building up in her chassis. "Now."
"Us," Sunstreaker corrected himself, groaning lightly against Shimmerfire's backstruts as he pushed into her and immediately began fast paced thrusts. He wrapped one arm around her slim waist for leverage, the other giving sultry caresses on her wings.
~Oh yeah,~ Sideswipe howled across their bond, throwing it wide open as he joined his brother in pounding the Seeker's valve as she arched, moaned, and writhed desperately between them.
~Close off as much as you want,~ Sideswipe warned him before unlocking his chest armor so it could slide apart.
When Sideswipe's wave of pleasure hit him, Sunstreaker's doubled, causing his engine to vibrate heatedly against her back, pressed snugly against her to enhance the feeling. He grunted in acknowledgment to the silver mech, pressing an almost non-existent barrier to the connection Sideswipe was about to share with Shimmerfire.
His spark, still pulsing with need in its chamber, wouldn't give him the strength to produce a higher barrier than that. Instead, he focused that energy on his surging hips.
The sound of her chest plates opening in response to Sideswipe's was erotic and terrifying all in the same sensation. He felt as much as heard their sharp cries as their sparks reached out for each other; hers aggressive and demanding, his welcoming and hungry. Pleasure, raw and as intense as anything he'd felt while merging with his brother cascaded across the barrier. Sensations; joy in freefall, the rush of wind against thin wing, the exuberant joy of flying with your own kind all rushed into his awareness, but it was nothing like when her spark had touched him directly.
This time it was pure pleasure, filtered by the safety net that was Sideswipe's experience.
Sunstreaker's mental awareness crept carefully behind the protective barrier, gently nudging but not piercing. He still hated being so raw towards another person that wasn't Sideswipe, even if his spark almost demanded the contact, feeling that its other half was being pleased so immensely and wanting badly to join it.
He felt her spark notice his, and very, very gently reach out to him, offering without crossing the barrier it could so easily shatter. Ever so faintly, coming through Sideswipe, he could hear her.
~Want you, care for you, join us,~ her spark called to him in an entreaty that was entirely un-Seeker-like. ~Won't hurt you,~ it promised.
The awareness coiled within itself, shifting away from touching the barrier roughly despite how fragile it was to begin with. Her voice, though, carried through his brother's open bond, stilled him. Sunstreaker hesitated, afraid of what might occur if he gave in, but Sideswipe sent soothing waves, promising him that there was no pressure, but that he would be safe.
His spark pulsed, and he couldn't contain it any longer. The barrier disappeared. As thin and elastic as it was, it popped out of existence like a bubble. Sunstreaker immediately reached out first for his brother, wrapping himself in the familiarity, until that awareness shyly reached for Shimmerfire as well.
Ecstatic but as careful as if handling an early newborn, her spark caressed his, trilling a wordless song that carried with it a promise of safety and care. Even though it was a Seeker-thing, a Seeker-song, this close he could feel-know what it meant in her spark. As intense as the pleasure was, as badly as she wanted to immerse herself completely in both of them and immerse them in her, she held back. She held it all back, held everything her upbringing and her core programming demanded just for him, because she cared about him.
And Sunstreaker knew that, he could feel it, just as he could feel and hear her sing her Seeker-song for him. He felt foolish in having held back before, especially when he should have known without contact with her spark just how much she cared about him and his brother.
The pace at which he opened himself was slow, but the pleasure he sent wasn't wavering. He allowed her to feel just how amazing it was to be pressed into her valve up against his brother's spike, combined with what Sideswipe felt at the same time that only doubled the sensations. How proud he was that she'd chosen them over Tread Bolt, especially when that meant not only him but Sideswipe as well. They weren't easily accepted by others, given how psychopathic Sunstreaker tended to be and how Sideswipe always took his side no matter how wrong he was, yet she'd opened her very spark to them, and protected him from sharing everything far too quickly.
~Care for you, Shimmerfire.~ His mind brushed hers gently, his spark awareness joining the sun-like intensity of Sideswipe's. Suddenly the reality was something far greater than it had been. Suddenly it wasn't something to piss off the one who was watching them, but a true sense of unity between twins with one who was usually afraid to reveal himself, and the other who would give anything to see his brother happily share himself the way he saw him.
She shivered and trilled, crooned, continued her song of safety and care as she opened herself up in step with him, and never a step faster.
Sunstreaker felt, even more than her care, his brother's intense pride in him for taking this leap and joining in.
~Warriors, together. Strong, us.~ Shimmerfire's coherency was slipping in the pleasure she'd never known before. ~Try, little ones?~ she struggled to ask instead of taking, an iron will built on respect for them holding training and instincts in check.
Sunstreaker's awareness hesitated even more than before, considering her request and knowing through her that she was forcing every code and instinct back with sheer will out of respect for them. Was it even possible? All their lives, they were told what they could and couldn't do was based on the fact that together, they were driven by the same, split spark.
The golden mech wrapped himself around Sideswipe again, though he didn't push Shimmerfire away. He coaxed her closer. ~Sideswipe,~ his voice whispered, his own coherency lowered but with some experience, higher than hers, ~would it make you happy?~
~Very.~ He wrapped himself further around his brother. ~Even if it doesn't work, to try would be wonderful. She doesn't need a bond for it.~
Sunstreaker affectionately brushed over Sideswipe's mind, pouring love and devotion into him, even sharing some of it with Shimmerfire because he knew he couldn't keep her out of his spark any longer. Not when it reached for her. ~I want to make you happy,~ he droned, ~want to give you what you've always desired.~
If he couldn't give Sideswipe this, then they could try with Shimmerfire. She was the only way this could happen. That was what they had been raised to believe.
His awareness brushed over Shimmerfire, sharing more ounces of himself; his thrill for battle, flying above the skies during the times he and his brother attached themselves to the flying 'Cons. ~We'll try.~
He felt her very spark shudder in joy, her mind in relief and her base coding settling in contentment.
~Thank you, Sunstreaker, Sideswipe,~ she reached out for them with her spark, still careful but no longer holding back. But this time she was drawing them in as much as sending herself out, and Sideswipe was right there with his brother every moment until none of them could tell where one began and the other ended and the pleasure of body and spark crested into the searing white-hot ecstasy of a massive three-way spark-merge.
In knowing that even attempting would make his brother happy, Sunstreaker didn't hesitate. The images and emotions and memories all blended into one, and the golden mech was no longer just a part of himself and his brother, but Shimmerfire too was wedged perfectly between them, around them, and everywhere else in between. He gasped both audibly - though he wasn't in much control over reality at this point - as well as mentally, sending and receiving pleasure like he'd never felt it before.
An overload was imminent with this, he knew. He'd never fully opened himself in a spark merge to anyone but his brother, but this was extraordinary. Not only was he experiencing it, but Sideswipe was there, was everywhere, just as he was and Shimmerfire.
| Chapter 4 | Chapter 5 | Chapter 6 |