Heyy I had a request. What if Optimus Prime is cuddling with a human woman, and he notices that she's ovulating and gets aroused by it? And he kind of inspects her body
Optimus Prime cuddling is not something I knew I would ever need this much, also this is a long one. 5,404 words
Bayverse! Optimus Prime x (Human Female) Reader | 18+ “Something More”
“You’re so tense…” The warmth of his neck cabling felt so alive under the pads of your finger tips. Beneath the soft mesh of the cabling was a rigid mass. Surely this was akin to something like a cramp to humans. As you pressed harder the mech winced beneath you.
You hadn’t meant to make his pain worse at all, prompting a wave of guilt washed over you. You straddled him while sitting, his chassis hot against your bottom. His backstrut tensed against the soft coverings you spread across the floor for him. The feeling of them was unnatural, but they helped ease the strain of his many cycles without a well adjusted recharge.
You turned your attention to the other side of his neck cabling and his optics followed your movements. “Are you still with me, Optimus?” He nodded his helm tiredly in response. The metallic lenses of his optics fluttered and you couldn’t help but be encapsulated by his mannerisms. He was so different, yet so similar. His expressions, gestures and tone all registered to you as if he were human too. You mentally disciplined yourself to focus on helping rather than staring.
As hard as it was to concentrate when he was mass-displaced, you’d have to set that intrigue aside if you wanted to be attentive to his needs. Your little hands could get into places between his armor that he couldn’t with his own servos. That was your expertise to him, able to ease and massage that tense frame of his.
The trust within the bond the two of you shared made this possible. He placed a servo on your back and eased you in closer to his frame, the touch gentle yet firm. “So, how was your day?” That question was something you’d ask him frequently, but today it just felt out of place and even inappropriate to ask.
With how tense his protoform was under the neck cabling, you could take an educated guess on that. “I can’t tell you…” His tone was apologetic and you chose not to grill him for further information. What sucked was you didn’t have that kind of clearance to be able to know about certain things going on and off the base. He’d tell you bits and pieces of what he could, maybe even a little more than he was supposed to…
As one of the very few civilians on base you knew far more than the others but that’s because he trusted you enough to share things with you. Your hand found a particularly tight area right under his chassis and his expression became far more relaxed as your fingers gently massaged it. His free servo positioned itself on your waist and kept you angled as you searched for any sensitive areas between his audial fins.
The tips of his digits massaged into the side of your waist, returning the favor unintentionally. When you glanced back at his faceplate you noticed him staring and looked away, a heat raising within your cheeks. Just friends. Friends that trust each other a lot, that's it.
That was the truth, but when he looked at you there was something else present in his optics, and it wasn’t just trust. He could feel it too. His optics examined you the exact same way you examine him. Different, yet so similar.
A shiver ran over you with his longing stare so you cleared your throat. “Alright you big metal bucket of rust, you’re alright and relaxed.” You tried to sit up but both of his big servos held you in place firmly. Your hips rocked on his chassis as you tried to wiggle out of his grip and there was a glint of humor within his tired blue optics.
Optimus gently lowered your top half down further to him until your face was a mere few inches from his own. You watched as his nasal bridge adjusted as his olfactory receptors took in a scent, maybe two. An optical bridge raised and he allowed you to sit yourself back up. That was a far different scent than he was used to you having. As different as it was, his systems recognized it immediately.
It shouldn’t distract him as much as it did as he has identified the same scent amongst humans before but with you it became disruptive. You were what Ratchet called ‘ovulating’ with something else mixed in this time. “Is there something wrong?” His optics flicked over to meet your eyes and for a moment he felt a hint of shame.
He was far more disciplined than that. As a Prime the mech spent eons of being controlled and methodical, and yet he scents the indication of potential mating along with arousal and almost unravels. “There is nothing wrong.” The rumbles of his deep voice had you adjusting your hips on his chassis. He noticed that.
You didn’t believe him at all but chose to only to avoid the thoughts of having done something to make him this uncomfortable. His servos on your hips continued to keep you in place while you both mentally dwelled on something unsaid between the two of you.
If he wasn’t uncomfortable then what could he possibly be hiding at the moment. The stoic old mech was vulnerable enough around you to show you various sides of him but now he appeared to be hiding all that away. Optimus sat up, sliding you down to his lap and keeping you there. You were now looking up at him instead of looking down at him and further away from his faceplate entirely.
“There’s clearly something wrong.” You folded your arms together glaring up at him and he acknowledged your irritation by moving a servo to the small of your back allowing the warmth to radiate there. “Easy.” Which was both a command and an attempt to deescalate from him. That scent was still there to beguile him while your writhing form stirred something within him.
You wanted off of his lap, immediately. If he was just going to deflect from the situation then he could do that alone in his quarters by himself. The future loud complaints you had in the back of your throat were drowned into silence when he lifted you up to pull you into a kiss. As much as you wanted to be surprised, you couldn’t, there was always something resonating there and unmentioned.
The taste of his mouth against yours was more than just foreign and alien. It was pleasant, so pleasant that it made you feel warmth at your thighs. As his glossa explored the inside of your mouth you realized it was strangely softer than you thought it would be.
Maybe they are just like humans, they just have a rather hard metal exterior compared to soft human skin. Even his lips or dermas as they called them were made of a more pliable metal that the rest of him. It had some give to it, and that excited you. The way his mouth moved against yours was a telltale sign of something else brewing.
Abruptly he pulled away from the kiss, he then stared at you momentarily with turmoil in his optics. Clearly trying to find every possible justification for what he was going to do. All the excuses he’d have to have handy to explain this if the relationship the two of you shared took this route. It would be controversial… to say the least. Yet that didn't seem to deter him from you.
His thumb digit ghosted over your lips, the physical touch reminding him that the kiss you two shared actually happened, and he was responsible. You were so much smaller and softer than him and the thought of him injuring you during such an act kept him at bay for the time being.
You’d be in grave danger if the mech began a much more intimate relationship with you. Keeping this a secret would be difficult and internally you both knew that. The warmth of his servo heated your palm as you placed your hand on top of it. The conflict radiating off of him happened to bother you.
“Optimus, it’s okay I promise. You’re not going to hurt me.” As if you two were already spark bonded, you could tell just what he was thinking. Always knowing just what to say to ease the Prime, it was certainly a talent of yours.
Your mouths connected in a kiss for a brief moment before you felt his servos guiding you onto your back. “This only happens if you want it to. I am not going to be disappointed if you refuse me.” Chivalrous as usual. You flashed Optimus a smile as you guided his servos down to your hips.
How could you refuse him? He’d saved your life more times than you’d even be able to remember, he’s gentle with you, he’s learned to trust you, and if you’re being honest he’s actually really attractive for someone that’s not even human.
“I don’t think I’d ever be able to deny you, Chief.” Chief. The nickname you gave him the day he brought you to the now back in operations N.E.S.T base after an accidental run in. Once on base he was far too busy to even acquaint himself with you, so you called and referred to him as Chief for almost an entire day before he finally introduced himself. To you the nickname just fit, you rarely use it now after he’s told you that you don’t have to formally address him.
After hearing that his optics dimmed slightly. A particularly heavy vent left his intake. Suddenly he likes that nickname. His servo hooked itself underneath your shirt in the process of pulling it off, but then he paused to look at you. In your own alien way he found you beautiful. You resembled a cybertronian femme so much but your uniqueness of your species made you special to him.
The shirt you wore was grabbed and lifted off by your own hands. You sat up just to unhook your bra band’s clasps and free your bare breasts. “Please don’t let me be the only impatient one.” There was humor in your voice, but little did you know his spike ached dreadfully behind his interface panel. He’d give anything to free it but he didn’t want to potentially scare you so early on.
He helped you remove everything else you wore, but you could sense the hesitancy in his actions. As if he was still unsure about all of this. You were so eager before and now you held your exposed legs tightly shut, finally the seriousness of the situation setting in and making you absurdly nervous.
Reality hit you hard when you remembered you’d never done anything like this before. That’s right, there was still the chance you could utterly embarrass yourself in front of the mech from lack of experience. Optimus noticed your shut legs and raised an optic ridge, you were just eager moments ago and now you seemed unwilling.
“If this isn’t something you want then we can just stop.“ You shook your head no as you tried to find the right words to explain to him what had you so shaken up. The expression on his faceplate did little to hide his confusion so you just blurted out your situation.
“So this is going to be my first time.” Saying it out loud didn’t ease you, not even just a little. You expected him to look at you with regret but there was only a countenance of understanding. A servo lifted up your face to his own faceplate and the two of you were close enough to kiss again.
“I will be very gentle with you. We will do this slowly.” He meant every word to you. He was going to try his hardest to control his strength and keep you from being overwhelmed. The fact that you trusted him enough to allow him to be your first made his spark hum within its casing.
After a few deep breaths you were calm enough to allow him to position his helm between your now parted thighs. His gaze lingered upon your sex making you feel rather self conscious, which was short lived once you felt the swipe of his glossa at your core. His ‘saliva’ if it could even be called that slathered along your slit. For him you were far from being anatomically different from a cybertronian femme, even the positioning of it. was the same. Which meant that he thankfully already knew just how to please you.
The next time his glossa came into contact with your cunt, it was to glide across the sensitive bundle of nerves between your folds. That gesture made you gasp and your hips involuntarily buck up into his faceplate. That kind of heat and wetness against it was unlike anything you’ve ever been able to do with your fingers or with a toy. He began circling the tip of his glossa around your clit and that made you writhe and moan loudly. The slowness of it felt like he was teasing but he promised he’d be gentle with you and take this slow.
He got closer to your slit and took your clit into his intake and you immediately tried to shut your legs. A quick servo of his stopped you while keeping one leg parted and letting the other close around his audial fin. His other servo slid up your heaving chest, digits rolling one of your nipples. Clearly he was just as intrigued about your body as you were with his.
His movements became faster and you threw your head back. Your hands became tangled in the plush blankets below you as you felt the hot pressure building within your abdomen. There was no way you were about to finish this fast, it was almost shameful.
A few more circles with his glossa before he closed his dermas around that precious bundle again and you came undone under him. The orgasm was quick but your cunt clenched and spasmed fiercely. Your climax didn’t make him stop pleasuring you, in fact he believed you needed more. That servo of his which fondled your perky nipples descended down, its destination between your legs. His pointer digit gathered some of your wetness on its tip before he gently pushed in inside you.
His finger was of course much larger than your own so the stretch didn’t surprise you. His intake never left your sex as his optics looked up to you to make sure you were handling this okay. When he was sure you weren’t in any pain he pumped his digit inside you while you mewled. The grip you had around his digit worried him, it created some doubt about whether he could actually fit his spike inside of you.
What relieved him was that you could take his digit all the way past the last joint, proving you had far more depth to you than expected. His audio receptors captured every whine, moan and gasp that left your lips. If only he knew he could get you to create sounds like these much sooner.
Your second orgasm was actually tear jerking, just so immensely powerful that your eyes rolled back and stayed there for a moment. The rhythmical circles he worked around the precious bundle with his glossa combined with his digit pumping into you would be the death of you. Even during the high of that climax his motions didn’t cease, he didn’t budge when your thigh pushed firmly against his audial fin.
When he removed his digit from your walls and replaced it with his glossa you saw stars. The size difference between his digit and glossa made you whine. In the Prime’s processors he consistently reminded himself that he needed to be gentle with you but the desire to taste you overpowered all of that. And no it wouldn’t have been enough to taste it from his digit, he needed it straight from your core.
Witnessing the usually very composed mech behave this way was startling to you. All that hard work he’d done to restrain himself, his discipline and morals becoming completely futile in a moment of intimacy. His glossa meticulously roamed your begging walls while you writhed in his grip. To him this moment of risk was well worth its reward, the taste of you within his intake proved to be sweet and palatable.
When his interface panel slid off with a loud hiss his shoulder axles unstiffened, the confinement of his spike a mere memory. The relief he felt was immense. To keep his interface panel sealed while his pressurized spike pulsated against it was borderline torture. Yet he wouldn’t hesitate to do it again to make you feel comfortable and prevent you from being overwhelmed.
He pressed two digits into you this time to collect your slick and applied it to his hardened spike. You caught a glimpse of the slickened metallic shaft standing tall at his hips and your attention focused there. He squeezed himself to show you that it had some give to it and you let out a relieved sigh. Even with that positive factor it still seemed just far too big.
“I’m going to be gentle.” Which came out more like he was reminding himself than easing your worries. That overwhelming feeling of doubt within his processors about whether this will work would stay stagnant until he actually made an attempt. While looking at your dripping slit his hardened spike twitched causing you to shudder.
You even clenched a little seeing its abrupt movement at his hip-struts. He moved to get on top of you, spike accidentally sliding against your slit causing you both let out a small moan. A pronounced moan in that deep voice of his had you clenching around nothing. You were so eager and overly excitable that he probably didn’t even need to touch you to cause a reaction.
While on your back you lifted your head up to look down and see that thick red and blue plated shaft he was angling at your entrance. Before the tip dipped between your thighs it dribbled and left a dense clear fluid trail from your belly button to your sex. Soon you felt the head of it pressing at your dripping hole. ‘Far too big’ you thought as he attempted to press in for the second time after being unsuccessful.
He tried again pressing it at the opening slightly hard that time and the result was the same as last time. “Wait there’s an easier way. I could uh just sit on top of you and gravity will help us?” Your voice became meek the further you explain the suggestion. The explicitly of it sounding completely out of place coming from you, and the notion that he may not even be a mech that would want a ‘femme’ on top of him anyways.
Optimus hesitated for a moment, clearly not as keen about switching positions just as you expected. You were going to tell him nevermind but he rolled over onto his back-strut pulling you on top of him. The movement was quick and swift and yet you still squealed expecting to somehow be crushed in the process. “Sorry.” His tone was apologetic, but you could have swore from the corner of your eye that you saw just the faintest smile just before it vanished.
Ignoring his oddly sly behavior you focused on the thing you’ve been waiting for him to give you this entire time. Your hand reached down between your legs and wrapped around his spike and it felt just as warm as the rest of him. The metal plating of it had just as much squish to it as the metal of his faceplate.
This skin of his never ceased to amaze you, soft pliable metal in some areas and strong hard metal in others. His spike was rather heavy in your hand, the weight of it making it even more imposing. Truthfully you weren’t shocked he was unable to sheath himself without hurting you, your four fingers and thumb couldn’t even connect to wrap fully around his girth.
You could feel his tip begin to dribble fluid again right down the back of your hand. This was good, you sincerely needed any kind of extra lubrication you could get. The weeping tip was guided to your entrance by your hand for you to make your first attempt at sitting yourself down on it. With the first try your walls didn’t budge, not even a little. The disappointment you felt heightened until on the second try you felt a tearing pain while hearing him groan.
That pain left you no longer able to support yourself on top of his chassis so you collapsed on top of him. If you had to guess only an inch slid in, and yet your legs were already trembling. Looking down at you he felt worse than he thought he would. He knew you’d be in pain but not to this level. That vice grip you had around him almost entirely clouding his judgement about whether or not he should stop this. Deciding to make the right decision to protect you he placed his servo on your lower back, coaxing you off of his spike and you of course disobeyed.
Instead you took your chance to sink further down even though it hurt like hell. He tried to help you off once more, and again you ignored him. The lower you sunk down the more your pain had diminished. After those painfully aggravating minutes had passed your body was flush with his own, surprising you both.
None of your toys had ever provided you with feeling this degree of fullness. The kind of fullness that made your head feel heavy and caused your legs to tremble. “You did it.” He praised, while letting a servo cup your delicate face. Yeah, you did it, now just how were you going to manage it. You decided you’d start by letting your hips rock back and forth while around his length.
That was all you could do for the time being as you had not found the strength in your legs yet to fully ride him. The height that you needed to raise your hips just to lower them was just far too much for you to do right now. You were able to grind your clit against the rim of his spike casing leaving you whimpering on top of him. The more firm and smooth metal rubbing against your swollen nub had you reeling.
Optimus had never removed his servo from your back, confident that leaving it there would help keep you stable. Every unsteady movement you made kept his optics in a trance. He watched as you struggled to find your rhythm, rocking against him in shaky motions while searching for a pace that finally felt right. The way your little heart beat far more than it should have during a moment like this meant he needed to assist you and ignore your impending stubbornness.
His servo moved to one of your hips followed by another servo on the other, both latching on adjacent from one another. Both servos gently lifted your lower half up around his spike and then down again, fully sheathing himself once more. “Hey! I can do that myself.” Before you had the chance to writhe in his grip and give him an issue he did the same movement again with your body and you keeled over in his grip. He quickly found a soft rhythm that pleasured the both of you and had you burying your face into his chassis.
The noises your cunt made every time he raised your hips were almost embarrassing, you didn’t know it could get that noisy when you were that wet. Soon you were moving your hips in sync with his servos drag of them. Then not too long after that you were able to raise your hips all on your own, setting a slightly faster pace that caused you both to moan. It sucked being so much shorter in comparison to his mass displaced height. It essentially made the occurrence of you kissing him during this very low.
Low but never zero, you learned as he leaned up and you raised up half way on his spike to meet each other’s mouths. The kiss lasted a few moments before you brought yourself down on the rest of his spike. Hips rocking momentarily before you resumed your previous movements.
His servos wrapped around your hips again, but before you could tell him you didn’t need his help anymore he flipped you over onto your back and began thrusting into you. The quickened pace made your bare breasts bounce hard upon your chest. His spike knocking the air from your lungs with every jab of his tip at your cervix.
It was already pleasurable before, but him taking the reins left you making incoherent babbles amongst your slew of moans. Thoughts certainly happened but the words came out jumbled. Your walls spasmed and clenched desperately around him squeezing his spike beyond belief. He already found you tighter than his closed fist so every clench spurred him to thrust harder.
He tried to control himself, contain his desire and his need for you. To listen to your body instead of his, repelling a side of him that wanted to do this to you roughly. A side of him from his younger years before becoming a Prime that wanted to leave you spike drunk. If you told him to stop and that this wasn’t the way you wanted your first time to be, he’d place your needs over his and listen. When you said nothing and wrapped your legs around him he took it as a sign that you needed this too.
The whining of scouts who didn’t want to complete their duties. The incessant fighting in between mechs on base, and all of his stressors from today seemed to release with every quick snap of his hip-struts. Just one more harsh spasm of your walls and you were coming around his spike.
To say that surprised you was an understatement. Neither your hand or his strummed at your clit for that to even happen, causing that orgasm to startle the hell out of you. You didn’t even know you could do that, an orgasm with an untouched clit? And you thought you knew everything there was to know about your own body.
That climax of yours only galvanized him to pound you harder. He minded his own strength and set a limit for how far he’d go but it was getting harder to control that by the minute. The way your heat fisted and constricted itself around the malleable plating of his spike made his processors spin.
Your nails dug into his chassis, causing him to let out a low growl. A noise you’ve never heard him make before, you liked it. And if you didn’t say that then he certainly felt it with the way you clenched in response. Suddenly he stopped thrusting, you whined and bucked your hips practically begging.
The whining pleas you vocalized had not gone unnoticed. He pulled out the entire length of his spike causing you to whine and whimper even more. You were maneuvered off your back and onto your belly, during that you got a view of his erect spike drenched in your slick with a white ring of cream around the base.
While on your knees you pressed your face into the plush blankets beneath you and arched your bottom higher to allow him a better angle. You understood the change of positions at least from what you’ve seen in porn. When the tip of his spike slid against your slit you felt it twitch against your folds. He was ardent on having you like this, the heavy vents from his vocalizer told you that much.
His spike slid in and your breath hitched, the tearing burning stretch you dreaded was felt all over again. It started to fade so much faster than it did the first time. He placed a warm servo on your back once more to soothe you, apologetic for the pain you’re experiencing.
He waited for you to become adjusted to the stretch again even though he badly wanted to continue thrusting. He would never do something that he knew would hurt you and leave you in distress. Once you felt ready you rocked your hips back against his letting him know the pain had subsided.
The first thrust pulled a loud moan from you. The change in angle felt like a different experience entirely. You buried your face in the blankets below you when the thrusts continued and slowly built up pace. This time you felt his servo move to between your legs while the other was on your hip. His digits zeroed in on that tiny bundle of nerves, circling it and causing you to cry out his name.
The loud slap of his metal exterior against your skin became louder than the noises of your slick sex. You could still feel his optics on you, scanning your back, watching your movements for any sign of pain. He was still not too far gone to cease his protectiveness over you.
Soon you felt an orgasm building, and you wouldn’t be caught off guard this time. The growing tightness within your abdomen, that coil of heat there threatening to snap at any moment. You could hear Optimus venting from behind you a lot louder now. Between his thrusts he’d groan and say something in his native language that you couldn’t possibly understand. His frame ran hot as his spike bullied through every tight clench of your walls, tip of it leaking beads of thick pre-transfluid against your cervix indicating his soon coming overload.
Then your legs began to weaken, moans got louder and you finally felt it. That knot within you unraveled causing your hands to tightly grab the blankets below you. Every thrust from him only made each wave of your climax stronger. Your eyes teared up and suddenly you felt his-struts snap harder against you. The walls of your cunt sucking him in with each pulse wanting to desperately milk him.
“You’re mine.” You almost just barely heard it amongst the other noises going on. He said it so calmly amongst his vents causing you to shiver. His spike twitched inside you sporadically then you felt hot thick streams of fluid spilling into you. With his continued thrusts his blue transfluid frothed out from around his spike and trailed down your thighs. He rode out his overload pistoning inside you without any clear rhythm. Following his completion, he stilled inside you. His spike depressurizing with a faint throb.
His servos caressed the sides of your hips, feeling the indentations of his prior grip on them. He looked you over, looking for any signs of damage and injury. A gasp left your mouth when his spike pulled out of you, allowing more fluid to escape. You were gently turned over onto your back, he checked again for any injuries and found none.
“I’m fine, I promise.” Your tone seemed upbeat and normal to his audio receptors. A smile on your face eased his worries. His servo entwined with your hand causing you to smile even harder. All of that tension between the two of you finally had an ending. It was quite a pleasant and unexpected one. Yet the question in your mind became what the two of you were now? Still just friends or something more?
He pulled you onto his chassis, the recent memory replaying in your head of him allowing you to ride him. Your cheeks flushed remembering the expression he made after he bottomed out inside of you. The two of you engaged in another deep kiss, his servo wrapped gently in your hair. His mouth leaving yours to whisper something to you in a language you couldn’t decipher. Whatever he said while cupping your face caused his spike to pressurize again and prod at your thigh.
Oh this was definitely something more.
