Chapter Text
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Optimus was in the middle of sorting files in his office. Slowly working his way through documents that needed to be reviewed and signed. Also offers and requests to take into consideration from the humans. An admittedly menial task- but it was still one that required his doing.
So when his office door opens and you walk in, Optimus can feel his optics crinkle at the sight. But he pauses when he realizes you have a rather serious expression on your faceplate. Then you turn and- lock his door behind yourself? Oh dear. What had happened?
Optimus puts the datapad down and watches as you march yourself over towards himself. He scoots his chair backwards fully intending to stand but you’re faster. You get yourself between his desk and his still sitting self to stare at him. A determined look in your optics and your mouth set in a firm frown. Your designation leaves him and before he can ask what was wrong- you start speaking.
"I need your spike in the back of my intake right fragging now."
Ah?
Optimus’s optics cycle at what you’d just said, because he must have misheard you.
You dropped down right onto your knees and grabbed his already parted thighs-! Staring up at him-
"Your spike- my intake- now."
AH.
Optimus’s finials jerk up to firm attention in surprise at the sudden demand. And yet again before you allow Optimus to collect himself, you waste no time practically shoving your faceplate against his modesty panel-!
"Love- what are you-?!" Hot and wet abruptly dragging along the sensitive seam on his very inner thigh makes his spinal strut arch. And for his thighs to instinctively clamp shut in surprise- regardless of the residence you had taken between them. Optimus had promptly crushed your helm between his thighs for a nanoklick, before he forced them to relax immediately once he'd realized what happened. Jerking forward after to make sure he didn't injure you seriously.
Your helm was just slightly dented on the edges but nothing else thankfully.
His servos holding the sides of your face stopped you from diving back downwards "Love, what has gotten into you-?"
"Sweetspark, Optimus- I will beg if you need me to." You interrupted him.
Optimus takes in your expression. You’re… certainty determined. As if there were no arguments to be had over the request. And a seriousness that demanded for no less. Your own servos reached up to wrap around his wrists.
You worried your lower derma and Optimus sighed deeply.
His resolve simply crumbling when your optic ridge creased looking up at him like that. "Alright, one quick round-" Optimus allowed his modesty panel to pull backwards and you practically lunged at his exposed array.
His spike wasn't pressurized due to the sudden ambush you'd decided to spring on him. So Instead you'd dipped lower and- The plating on his thighs flexed when you dragged the flat of your glossia from the bottom of his valve mesh up towards his anterior node. Your glossia lightly lapping against the tip of it once you’d made contact. Optimus sighed lightly when you'd repeated the act only to let your glossia dip between his valve mesh and run along his entrance in the process. On your third trip you'd elected to barely slip the start of your glossia inside of himself. His pedes twitching and his armor loosening under your tentative touch.
Though instead of burying your glossia fully into his valve you continued on to his anterior node once again. The charge you'd started in him had his node hardening and his spike wanting to form under your admittedly light administration's. Optimus grunted when two of your digits unceremoniously inserted themselves into his valve. A noise catching in his throat when you started languidly thrusting your digits in and out of him. A huffed vent escapes him when you take his anterior node into your mouth and swallow.
One of his servos finds itself on top of your helm when your glossia drags under the tip of his hard anterior node. His other servo gripping the arm of his chair. A quiet murmur of your designation falls out of him as you continue working his valve. A rather filthy sound occurs the next time you bury your digits now knuckle deep inside him. His own valve lubricant quickly making a mess out of your servo and his own chair. You hum against his node and he sighs when you pull your mouth away.
His spike is half way through pressurizing when you crooked your digits and leaned forward to lap your glossia against it. A low drawn out moan half sounded from his chassis- his spike quickly pressurizing fully at the sight and sensation of your warm glossia.
You got closer to his spike, optics focused like a starving turbofox staring down a petrorabbit. And Optimus suddenly finds some apprehension when you run your glossia over your bottom derma, your digits pulling themselves out of his valve.
“Love-” Optimus was cut off when you fisted his spike and smeared his valve lubricant all over his own length. His lubricant still warm from his own internal temperature- it made a shot of charge run right up his spinal strut. “Love-” he croaked out watching you wordlessly nuzzle your cheek up against the side of his spike. Your optics locked right on his faceplate when you pumped his spike again, smearing more lubricant over himself and making some drip down onto his own pelvis.
His servo worried the side of your helm, fighting not to give into the instinct to fully grab you by your helm kibble and pull with every touch you gave him. Optimus watched with rapt attention as you dragged your glossia up along the side of his spike; from base to tip before sliding right back down the way you came- servo lightly holding the other side of his spike as you did so. He could feel his smoke stacks start working in tandem with his engine rumbling faster just from the imagery alone. While the sensation of it had his optics brightening something fierce.
You pulled back a touch to drag the flat of your glossia against his spike head drawing another low rumble from his chassis. Optimus could only groan when you finally took him in your mouth properly and kept taking and taking him- “Love, you don’t need to-” You cut him off by swallowing around him and instead cause him to suck in a shaky hissed vent. His servo left his arm rest and found his own helm, trying to ground himself in any way he could. But it was rather difficult with how brazen your pace and actions were!
Optimus had to take a moment to find his currently shaky voice but he did and attempted to covey his thoughts again. “L-love, please don’t strain yourself just to service me.” Optimus knew his spike was a touch large and he didn’t want you hurting yourself being overenthusiastic to please him. Your optics that had offlined only partially turned on while you were more than halfway down his spike at this point. Optimus bit back a sudden moan when you hummed around him. The sound dragging along his length and almost sending Optimus spiraling in his own pleasure once more.
He was huffing in quick vents when his com pinging made him glance towards it.
It was from you.
>”Need this right now Sweetspark, okay?”
His finials twitched as he comprehended what you’d written him.
Optimus finally just sighed, his digits rubbing affectionately against where they still were on your helm. Your designation leaves him in a huff and his em field drips along your own frame trying to let you feel how heated you’d already made him. “Alright just- be careful, You know I worry about you…” Your optics brightened up and your servos brushed along his thighs. You only broke the gaze you’d shared to continue back down his spike length. Optimus turned against his own servo, trying not to let his helm roll back. He needed to make sure you didn’t strain yourself-!
Optimus jolted when your digits slipped back inside his valve when you’d almost gotten all the way down to his pelvis. His digits twitched against your helm kibble when you swallowed yet again- this time the action much more severe in consequence than the last. Something close to a whine caught in his throat when you’d pulled back off his length and your glossia dragged hot on the underside of his spike the whole pull back.
His spark pulsing strong and loudly- his own fans flicking on to try and combat the rising heat in his frame. His hips jumped up off his seat for a moment when you’d practically worried the tip of his spike with your glossia; in tandem with your digits curling upwards inside him.
Optimus was stuck tightening his struts so he wouldn’t buck right into your throat as you took your time making your way back down his length.
Optimus was in control of his own actions- He was in control of himself-! He will not risk accidentally harming you-!
You moaned around his spike and Optimus could only moan back in response, his spike throbbing inside your mouth from the stimulation. His own plating twitching and lightly quivering under the amount of charge thrumming in his array and frame. Your digits thrusting back into him faster now did nothing to help Optimus’s steadily failing sense of self. His vents coming out quicker and his grip firming against your helm- making sure not to grip too tightly. He could dent his entire servo print into your helm if he wasn’t careful-!
You pulling back again, glossia still as unforgiving as before, which only made him clench his servo against his own faceplate tight. His other servo lightly shaking against your frame in his own efforts to keep you safe-! Either undeterred or spurred on by his reactions you simply continued on servicing his spike. Helm bobbing as you took him back into your mouth and intake, your glossia unrelenting. Your own digits in his valve just as seemingly insatiable as your adventurous glossia. Every push and pull you’d give him sending Optimus closer and closer towards the edge-!
Oh, you were merciless towards him-! It had gotten to the point that he could only either focus his scrambled processor power on either keeping himself from accidentally hurting you, or controlling his vocalizor. Optimus of course chose to focus on the former and was stuck gasping and panting under your attention. His hips now twitching against his seat, risking jumping every time you’d reach the bottom of his spike. His thighs fighting to stay parted for your access and frame to be between them- his thighs wanting to close around your frame more urgently with each thrust of your digits.
Your em field curled around him and Optimus allowed his to intertwine with it- Which only made your own clear and blatant arousal just from servicing his array hit him like a plasma shot straight to the chassis. That was what had Optimus’s overload rear its helm like a sudden crisis. His servo left his own faceplate and he hovered it over the opposite side of your helm where his other servo was resting against. But Optimus didn’t allow himself to place it there, instead pulling it back to smother over his mask once more. “Love I’m going to-!” Your em field flexed with heavier arousal making it feel like your want was blanketing over his very frame.
You just sped up-! Helm moving faster and digits burying themselves knuckle deep every single time you’d thrust them back inside his valve. Optimus’s spark clenched and he knew he was done for-! Optimus groaned loudly when the heat of his overload started spilling over his own frame. His spark thrumming so hard it felt like it had smacked into the matrix’s casing. His plating laxing from its tight form and his spike throbbing as his transfuild started pumping into your mouth and intake. You’d just swallowed as well as you could- some unavoidably spilling down your derma and onto your own chassis. His valve clenching down on your digits with every pump of his spike.
When it was over Optimus slacked in his own chair, his gasping vents and murmurs of your designation rumbling out of himself. The warmth settling inside him slowly begun to leave his frame with every rapid vent he took.
Optimus still gasped when you pulled off his spike one final time- spike popping free with a wet sound. You were gasping in vents of your own and Optimus finally allowed his other servo to join itself on your helm. Now brushing them affectionately against your cheeks as his processor gradually begun working once more.
Your derma were slightly swollen from the act and you had some of his transfluid running down your chin and throat, a few drops even smeared on your chassis.
Primus. His finials flicked.
You pulled your digits out of his valve, the sound no less filthy. Optimus quickly unsubspaced a cleaning cloth and started wiping his transfluid off your chin and throat. But he hadn’t gotten to your chassis before you stood up on your pedes- leaning onto Optimus’s own frame as you did so.
Optimus let his arms wrap around your waist as you climbed into his lap and rested your frame against his own. You leaned forward and pressed a kiss against his face mask. His finials twitched when your murmur of affection registered in his processor.
Warmth begun curling around his spark once more.
Optimus leaned forward and nuzzled his facemask against your cheek. His em field curling alongside your frame further. “I love you too.”
Optimus really needed to let you know that back.
His servos dragged along the dips of your spinal strut, not ignoring how your em field flexed in response.
He’d… he’d have to find a way to properly convey his gratitude and affections for that entire labor you’d performed.
Though he didn’t believe he’d be able to hold a light to what you’d just done, Optimus was more than prepared to at least try and out due you.
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