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emotionallyattachednerd · 8 months

Text

Rightfully His ❙ TP Optimus Prime x f!human reader ❙ NSFW 18+

Word count: 2500+

Warnings: Smut ( Fingering and spike penatration ) low angst, possessive behaviour, jealous behaviour, size difference and robot x human. NSFW 18+.

Notes: You people are sluts for dom Optimus, and I don't blame any of you. He a snack! Um, so, here you go you filthy animals.🥰

Also to add, Optimus Prime is using mass-displacement, though he's still large, if you get what I mean. I didn't want this to be a repeat from the first one I did so that's why I went with this approach.

A day at the beach sounded perfect. Optimus was kind enough to drive you there himself. You enjoy spending time with him. Though once there he would need to remain in his vehicle mode while you take a dip.

Wearing your favourite bathing suit you take a dive and enjoy yourself, waving at Optimus with a beaming smile which everyone will see as you waving at a truck. Not weird at all.

While you were enjoying yourself a few guys approached you. They introduced themselves as you did too, making small talk. They were nice, and the casual talk turns into flirting, and you can't help but beam in return with a flushed face.

It's not often guys flirt with you so it was kind of nice to have it happen, though you weren't really looking for any kind of relationship at the moment. You already had your eyes on someone but you doubted they felt the same back, so you didn't hold your breath about it.

For now you enjoy the attention from these guys.

Not aware, Optimus watches. Being in his vehicle mode you couldn't tell he was glaring hard at the guys, wanting nothing more than to scoop you up and hide you from their prying eyes.

What bothers him more is that you're enjoying the attention.

It's not until afterwards that you finally leave the beach and jog towards Optimus' truck form. He stares at your breasts under the bikini bouncing with each move and that makes him groan lowly.

"That was just what I needed. Thanks Optimus, it was really nice of you to drive me." You say happily as I put the towel on the leather seat and sat on it so you don't get too wet or sand everywhere.

This was a last night thing so you didn't bring any spare clothes.

"So, you had fun?" Optimus asks through a hint of dullness, which you didn't pick up on right away.

"So much fun!" You continue to beam softly before relaxing against the seat. "So, my place? Wouldn't want you returning to base at a late hour."

"Of course." Optimus can only sigh before leaving the beach with the sunset setting across the long strip of road. The drive is perhaps an hour from your place, so you get comfortable.

Optimus watches you as he drives, stretched out on the seat wearing only your bikini, skin damp as the setting sun glitters across you. He notices your perky nipples through your thin top. He lets out a low groan, forcing himself to rev his engine to try and hide it, which doesn't work as you pick up on this.

"Are you alright?" You question curiously.

"I'm fine." His answer was dull and that's when you start noticing his odd behaviour.

"You don't sound fine." You point out, more curious as you sit up more against the seat. "What's wrong?"

Optimus knew he wasn't able to hide it anymore, not after so long. "Those men from the beach, they seemed very friendly with you."

"Oh those guys? Yeah I guess they were. It's nice to be noticed honestly." You can't help but giggle lightly.

"You liked the attention they gave you." He adds and that's when you furrow your brows. He goes on before you can answer. "You were friendly back, smiling, blushing. Do you often flirt with other men like that?" Now this is weird to you.

"Um...I don't know, I guess? It's not everyday I have guys flirting with me. Why does that bother you?" You can't help but cross your arms.

It was quiet for a moment before he finally answered. "I don't want you flirting with other men, or accepting such behaviour from them towards you." He can't be serious?

You can't help but let out a scoff. "Seriously? Optimus, it's harmless flirting. Besides, why do you care? It's not like we're dating." You answer through an annoyed pout.

It's Optimus. He's the one you've got your eyes on. From the moment you both first met you've been overly fascinated by him, and you're already friendly with him, taking any chance to spend time with the big bot. But you were both completely different and you don't think he felt the same way towards you, so you never advanced to push your friendship any further.

However, now it seems things are getting on thin ice.

"Jesus Christ, you sound so jealous. No, you don't get to be jealous, alright? If I'm going to flirt with guys then I'm going to flirt!" You are honestly annoyed. How dare he!

"No." His simple answer doesn't settle well with you.

"No?"

"No. You won't. That's an order." This is getting out of hand.

"An order? No, you don't get to order me around! We're not dating!" You had to repeat again.

"Are you refusing to follow my order?" You have no idea what's wrong with him, or why he is behaving like this. Surely he doesn't have feelings for you?

"Yes...I'm disobeying your order, Optimus Prime! Fuck you!" You lose your temper as you shout, feeling both angry and emotional.

Suddenly the seat belt tightens around your body and pins you against the leather seat causing the air in your to be pushed out.

"Optimus?" You can't help but whisper his name, staring at the dashboard as if that's where he is staring at you from while he drives.

"I'm taking you back to base." He simply answers, tone casual and dark at once.

Swallowing thickly you try to adjust yourself but he made it hard with just how tight the seat belt was on you and he wasn't going to loosen his hold on you.

"N-no, I said take me home." You remind him but he refuses.

"No. You need to be taught a lesson, and reminded." This get's your heart racing. What is he talking about?

"Lesson? Reminded? Of what?" You can't help but question.

"That you're mine."

His? What the hell is he saying?

You couldn't move and you heart rate wouldn't slow down. Optimus has never spoken to you like this before and that kind of scared you. He is acting possessive, as if you really did belong to him but you didn't. Right?

The rest of the drive was dead quiet. You can't bring yourself to say anything or even struggle, and your heart rate never once slowed down.

Once returning no one else was around you figured this out. Optimus transformed with you still inside him which he's never done before. It makes you yelp in surprise before oyu find yourself in his servo.

He doesn't look down at you as he walks into his quarters and over to his berth where he finally places you. Stepping back he stares, watching you. You are still damp from the beach and in your bikini you can only sit there and stare back, breathing heavily, wondering just what he is thinking.

Finally he moves towards you. He sat on the berth right beside you making your breath hitch, before something happened you didn't think possible. His large frame starts shifting, shrinking himself until he is at her level.

The sudden action leaves you speechless, unable to form words as you stare at him. He still has that firm stare on him and you go to say something but he cuts you off.

"Remember, you're here so I can remind you who you belong to." Your response is to give a nervous nod, but you can't help the thrill that burns through your core.

"Optimus, you sound upset?" You manage to say through a shaky breath. "Have I hurt you?"

"You have." His answer is not what you expect. "For a long time I've admired you, wanted you, but I saw you felt something towards me but I feared I might've been wrong. Seeing you with those humans, that bothered me. I don't want you doing that anymore."

"Anymore? So...what does this mean? What am I to you?"

"You're mine. That's what."

Suddenly he leans closer and you find yourself laying back on the berth where he had laid a blanket for you. He's hovering across your shivering body, his shadow consuming you.

"What are you doing?" You whisper through a heated gasp. Your body was reacting in a whole different way, one that is arousal.

"What I've wanted to do for a long time." Suddenly, he kisses you.

You can only let out a muffled yelp against his lips, which are oddly enough soft and warm. You respond through a low throaty moan, hand sliding up against his cheek plating as you savour his lips. You've imagined this for so long but never thought it would be this beautiful to feel the primes lips against your own.

Optimus responds back through a deep moan himself before gently pushing his glossa inside your mouth making you gasp and return the same with your own tongue. Both your hands were against him, caressing his face and slowly deepening the kiss more.

You love him. That's right. As silly as it might sound, you have been deeply in love with Optimus for a long while. But now, he was your obsession, an addiction you craved. All this time he wanted you and you had no idea. He was good at hiding it. Not anymore.

His servos move across your body, dancing over your quivering skin before feeling his digits tug at your bikini bottoms, the lace flying loose as he tosses them aside. Next is your top and that is gone pretty quickly with some help from you.

Bare naked, you wrap your arms around his neck and move your thighs up over his hips, grinding yourself against his plating which causes him to moan back in approval.

You need him, you want him, you ache for him.

"Optimus..." His name whispers from your lips as his mouth moves to your neck where he gently nips against your tender skin. "Feels so good."

"I only want you to feel good, and to know only I can ever do this to you." He says softly before moving his servo down to your core where he rubs his digit between your folds before gently pushing one inside your depths.

The sudden feel of his thick digit makes your back arch and he doesn't stop there, pushing further and curling into your clenching walls.

You respond perfectly, hips arching up and grabbing hold onto his shoulder pads, moaning loudly without any care who might hear you, and it didn't seem to bother Optimus either.

"I want everyone to know you belong to me, y/n." He says once again, as if you had forgotten. His digit pumps into you before he adds a second, stretching you so nicely. "I want you to be mine. Do you want me to be yours?"

"Yes!" You answer with glee and without doubt. "You, I want you!"

Optimus smiles hearing this. "Good."

He removes his digits from you and you grab hold of his servo, bringing it back up and sucking at his moist digits, letting out a low moan as you taste yourself.

Optimus lets out a low growl of approval as his vents kick in, metal heating up as his throbbing cable presses against his panel, demanding to be released.

You feel him rutting gently against your bare core, moaning loudly as your swollen clit grind against his plating. You needed him inside you, now!

"Optimus," you whisper his name into his audio before finishing, "Fuck me."

Any self control was gone.

You hear the sound of metal shifting, Optimus as well, before suddenly feeling the warm tarped tip of his cable pressing against your core and moving within, not holding back as he fills you completely, flushing his hips against you firmly.

The sudden fullness feeling his throbbing spike invade you is an experience you only ever imagined, and it's nothing compared to the real thing. He fills you so much, to the point you hiss through a moan and move your hand to your belly where you feel the tightness, only to gasp when you feel a bulge caused by Optimus.

"So full..." You moan out. "Feels good."

"Y/n." Optimus whispers your name as his optics flash through the arousal he was feeling building through him.

"Please move, I need to feel you fuck me, please." You plead while you caress his face under your hands, biting your lips as you clench around his more get him going.

Optimus does as you want, or what he wants, whichever it is. He rolls his hips back before driving forward again, pushing more deep beautiful moans from your plump lips.

His pace doesn't flatter as you wrap you legs tightly around his rocking hips, tugging him against you more as you hands grip into whatever armour plating you can get your hands on.

You feel every ridge of his throbbing spike brush along your inner walls, the tip pressing up against your belly, bobbing with each thrust Optimus gives you.

All you can do is pant and hold on, embracing your desires and what you've dreamed of now finally coming true. If only you knew he could change his size, perhaps you might've said something sooner about your strong feelings towards him and avoided the fight you two had.

It doesn't matter. The past is the past, and this is now, moving forward.

Optimus lets out long groans as he fills you over again before adjusting himself a little, and gaining a better angle before his movements become more firm and short.

The sound of his soft metal slapping against your damp skin filling both your ears and his audios added to the growing pleasure between you both.

One servo grips into your hip as he sets a more firmer pace, grunting out as you clench more around him, making it very difficult for him to hold himself from finishing so soon.

But you want it, to feel his fluids fill you deeply right now. You'll have other opportunities to explore and experience another time. This won't be the only time that you know.

"Please, Optimus, I want you to fill me so badly! Don't hold back, please. Just let me feel it all, please! I'm yours! Only yours!" You can't help but chant over again through your arousal as you feel yourself already nearing your orgasim.

Through your chanting Optimus lifts your hips up and ruts against your core, speed strong as his vents kick in and throat moans grow more furiously.

You let out a half broken sobbed cry of bliss as you suddenly feel your orgasim crush through you, and Optimus at the same time let out a strong burst of energy as he fills you deeply with his fluids, belly full of his spike and the warm liquid he spills within.

Holding on you relish every second, body shaking through the after shocks of your orgasim before eventually he slowly pulls out from you, feeling so empty now as some of his fluids follow behind.

In your orgasim daze you didn't realise that Optimus had turned back to his normal size self and held you close in his warm servo.

As you lay in his servo you curl your body around his digit before he brings you closer to his face where he gives you a soft nuzzle making you smile and hum in return.

Even after being in control and possessive over you, he also has some loving aftercare for you in store. He cares about you deeply, you know this, and you care about him.

"You'll always be mine. Understood?" Optimus says tenderly and you can only nod softly, having no complaints about that.

"Always. Does this mean we're dating?"

"How about I take you on a date?" The offer makes your belly fill with warmth.

"I would love that."

"Then we're dating." He confirms proudly.

You are rightfully his.