You're Mine || Poseidon X F! Reader
When Poseidon sees the way you look at his brother, he decides to remind you who the fuck owns your pussy (hint: it’s not the king of the underworld)
🖤 Day 14 of Kinktober: possessive sex 🖤
CW: possessive sex, rough sex, spanking, dubious voyeurism, squirting
Though Poseidon had been courting you for months, he hadn’t introduced you to his brothers yet. You had met his mother, of course, as well as two of his sisters, but his brothers were still a mystery to you. Though you had your suspicions, you weren’t sure why he refused to introduce you to them. You wanted to deepen your relationship with his family, especially as your relationship grew more serious, but Poseidon was so resistant to the idea.
“No,” Poseidon said, his tone laced with finality as his cold blue eyes piercingly stared at yours.
“Come on, Poseidon,” you groaned. “You’ve been courting me for months! When can I meet the rest of your family?”
“Why don’t we start with my father then since you want to meet everyone so bad?” He snapped. “Should we take a little tour of Tartarus?”
“You know that’s not what I meant,” you sighed, growing exasperated. This topic was like pulling teeth with him. “I’ve already met two of your sisters, why can’t I meet your brothers?”
“Zeus would probably try to bed you the moment I’d introduce you two,” Poseidon countered, crossing his arms over his chest. Though Poseidon didn’t have the most faithful track record, he hated the idea of his younger brother tempting and seducing you. ”What about Hades then?” You asked.
“What makes you think my answer to that will be any different?” Poseidon huffed. He was growing annoyed that you brought this topic up again.
“You’ve told me stories about him before,” you replied, reaching out to gently grab Poseidon’s hands. “How he’s your favorite brother, how you wish he got more recognition from the other gods, how much he means to you…is it so wrong that I want to meet the man my partner speaks so highly of?”
Poseidon thought about it for a moment. Unlike Zeus, Hades wasn’t a womanizer at all. As a matter of fact, he’d only had one dalliance outside of his marriage to Persephone. His eyes weren’t likely to wander from his wife, so he’d likely never consider seducing you. He supposed there would be no harm in introducing the two of you after all…
“I’ll ask Hades when he’s free,” he finally huffed before grunting as you tightly hugged him, burying your face in his chest.
“Okay yay! I’m so excited!” You cheered, grinning up at him. Your lover rolled his eyes at your overreaction.
“Don’t get too excited; I’ll have to see if he even says yes. He’s a very busy king,” Poseidon replied.
“Well I’ll be glad to meet him if I can anyways!” You replied, grinning before you released the Atlantean king. “I need to meet with the other Nereids now; I’ll see you for dinner!”
Poseidon watched as you scampered off, sighing softly to himself. Hopefully your bubbly energy wouldn’t be too much for Hades.
XXX
When Poseidon came into your bed chambers to let you know that Hades had agreed to meet you for dinner, you were over the moon. You were so grateful, in fact, that you’d practically ripped off Poseidon’s clothes, ushering him towards your bed so you could thank him physically. Though he usually found great pleasure in bedding you, he was beginning to grow suspicious of your sudden excitement. Why were you so happy to meet his family? No one was that happy to meet their partner’s family.
When your orgasm had crashed down upon you quicker and harder than usual that night, Poseidon had concluded that you were so excited for one nefarious reason: you wanted to seduce his brother. That idea soured his ecstasy, robbing him of the usual pleasure he experienced during an orgasm. He was now bitter that he’d agreed to your request in the first place. Once you realized how elegant and regal his brother was and how commanding his presence was, you’d probably prefer him over Poseidon. Had Poseidon not jumped to conclusions, he would have realized you were really excited because you thought he was taking your relationship to the next level. The thought of seducing his brother had never even crossed your mind. But Poseidon’s jealousy was already brewing up like a dangerous tempest. He’d try his best to suppress it, but if he had the slightest inkling that you truly wanted Hades, he’d have to punish you.
XXX
As you and the other Nereids and Oceanids prepared for Hades’ arrival, you couldn’t help but notice how tense and aloof Poseidon had become. Although he already was an incredibly nonchalant man, you’d known him long enough to know when something was wrong. Anytime you asked him, however, he brushed you off, pretending it was nothing. You chalked it up to him being nervous about how you and his brother might interact, but you were growing quite worried and self conscious over it. Did he think you’d make a bad impression on his brother? You tried to ignore the feeling, but you couldn’t help thinking that that was the case.
You tried to distract yourself by being as involved in the prep as possible, meticulously making sure every detail was perfect. You were as involved as possible on the day of as well, until the other Nereids urged you to spend the next few hours getting ready instead. You obliged their pestering and retreated to your chambers for a shower.
When you left the shower with a fluffy towel wrapped around your body, you saw that Poseidon had invited himself inside and was waiting for you right outside of the bathroom.
“Oh! Hi Pos—” you were cut off as Poseidon suddenly pressed a searing, possessive kiss to your lips. Though you were taken aback, you quickly melted into his grasp, wrapping your hands around his neck as he deeply kissed you, claiming your lips as his. When he pulled his face away from yours, his eyes were dark and stormy.
“When my brother leaves, you are coming to my bed chambers tonight,” he instructed. You merely nodded, wide-eyed at his possessive request. It was rare to see Poseidon so riled up. It excited you. He took in your expression for a few more moments before turning on his heel and leaving your chambers, presumably to get ready himself. As you processed his words, you put extra care into getting ready, making sure you’d be prepared for your exciting evening with your lover.
XXX
You and Poseidon waited in his throne room for Hades’ arrival. He was sat in his throne while you stood by his side. As you were not yet queen, you did not have permission to sit in the throne beside him, but you didn’t mind. You understood that it was customary, but as you stood there in your heels, waiting for Hades’ arrival, you were really wishing you could’ve had a seat of your own. If you were feeling daring, you’d sit on one Poseidon’s arm rests, but considering his testy mood, you decided against it, opting to maintain your uncomfortable posture instead.
Finally, Hades arrived, escorted by two of Poseidon’s royal guards.
“I apologize for my lateness, brother,” Hades said after he’d entered the room. “Things were getting out of hand in Helheim.”
“That’s quite alright,” Poseidon replied, though he didn’t leave his throne as Hades approached.
You expected the brothers to meet each other halfway or express a little more excitement; that’s how you and the other nymphs usually greeted each other after all, yet Hades and Poseidon remained poised and official. Maybe that was just how the kings of the hellenic pantheon acted.
When Hades appreached the dais, a slight smile crossed his face.
“It’s been a long time, brother,” he said. “I appreciate the invitation.”
Poseidon nodded, though no smile crossed his face.
“Now who’s the lovely Nereid standing beside my brother?” Hades said as he climbed the dais and turned to face you.
You felt your cheeks flame at the compliment as the King of Helheim approached you.
“I’m (Y/N), Lord Hades,” you smiled back at him. “It’s a pleasure to meet you.”
He gently grabbed your hand in his own and pressed a feather-soft kiss to your skin. When he looked up at you with those lovely lilac colored eyes, you nervously bit your lip. You hadn’t expected your lover’s brother to be so incredibly handsome, nor for him to look so different. In fact, their only similar features were their elven ears and aloof gazes. You took in his unexpected appearance, memorizing his features as he slowly moved his mouth away from your hand.
His hair was a brilliant silver, yet he still had the appearance of a mortal man in his early thirties. A blue laurel tattoo stretched across the left side of his forehead. You weren’t expecting a king to have face tattoos. Though his garb was more formal and conservative than Poseidon’s, his tattoos and piercings greatly contradicted that aesthetic.
Poseidon narrowed his eyes at your interaction. Why were you staring so hard at his brother? And why were you biting your lip like that? He was the only man you should ever look at like that. Poseidon coughed pointedly, prompting you to tear your gaze away from his brother.
Before you could say anything, Hades addressed his brother again.
“Now tell me, dear brother, why is this lovely nymph standing beside you? Where’s her seat?” Hades asked, raising his brow at his brother. Though he seemed to be teasing, Poseidon narrowed his eyes. He looked almost juvenile like that.
“You know the tradition,” Poseidon scoffed.
“No matter, let’s take this to the dining room, shall we?” Hades asked. “I’m sure (Y/N) would love to sit and rest her feet, as would I.”
Poseidon narrowed his eyes at the jab. What the hell was his older brother playing at? Was he trying to make a fool of him in front of you? Poseidon tried to keep his cool and just nodded.
“Follow me,” Poseidon said. As the three of you walked, Poseidon tightly held you against his side, possessively resting his hand above the curve of your ass. Your cheeks flamed as he did so. What the hell had gotten into him?
When the three of you entered the dining room, Poseidon sat at the head of the table with you to his right and his brother to his left. One of his hands rested on your thigh as you conversed with Hades. You were too engrossed in the conversation for his liking.
“Wow, I never knew Helheim had so many regions,” you said, sipping your wine. “It sounds fascinating.”
“You should visit sometime,” Hades smiled. Poseidon’s hand grasped your thigh a little tighter. “Of course, it’s not as beautiful as Atlantis, but there’s charm even in the worst of places.”
“I’d love to!” You replied. Poseidon’s hand now clamped down on your skin like a vice. You gently placed your hand atop his and turned to face him. “Can we go sometime?”
“I’ll think about it,” Poseidon said before taking a sip of his own wine.
The dinnertime conversation continued, largely between you and Hades. He hated seeing how much chemistry the two of you had together. How did his older brother manage to captivate you so much? He hadn’t even caught your attention that quickly. He knew he’d have to remind you who you belonged to.
“Well I ought to depart,” Hades said after dinner was over. “Persephone is waiting for me, after all.”
“May we talk for a moment before you depart, brother?” Poseidon asked. Though his tone was as flat as usual, there was a subtle iciness to it. Hades raised his brow at his younger brother’s attitude.
“I don’t see why not,” Hades shrugged.
“(Y/N), head to my bedchambers; I’ll be there momentarily,” Poseidon commanded. You nodded your head and scampered off towards his chambers, wondering what he could possibly have to talk to Hades about.
XXX
You waited for Poseidon on his bed, wearing nothing but a teal lingerie set, just the way he liked it. When the door to Poseidon’s quarters slammed open, you jumped slightly. Poseidon’s eyes were stormy with anger. The door behind him slowly creaked shut without him so much as touching it.
The moment he reached the bed, he snapped his fingers, magicking away his clothes and rainboots. Your face flamed as your lover exposed himself so suddenly. You barely even had time to take in the sight of him before he pounced, pinning you to the bed as his lips smashed against yours.
You moaned out in surprise against his lips as his bruising kiss consumed you. He kissed you as if he was sucking your soul from your body, stealing all the air from your lungs. You tangled your hands in his wavy blond hair, arching your back as he pressed his bare knee against your panty-clad cunt. He gently ground his knee between your legs, hungrily swallowing each of your moans and mewls. His tongue stroked against yours, exploring your panting mouth. You didn’t even battle his tongue for dominance; you let him claim you, as if you were all his for the taking (though he was doubting that tonight).
Suddenly, Poseidon tore his lips away from yours and his eyes bore into yours.
“Tell me, (Y/N), are you thinking of him right now?” Poseidon asked, glaring down at you.
“…what?” You asked furrowing your brow. Poseidon pressed his knee harder against your cunt, making you whine out. “Who are you talking about?”
Poseidon’s eyes narrowed down at you as he ground his knee against your clothed cunt.
“Hades," **he hissed out. “Are you thinking of him? Wishing my brother touching you like this?”
“What the fuck?” You furrowed your brow. “No, Poseidon, why the hell would I be imagining your brother right now?”
“Why wouldn’t you,” he countered. “I saw the way you were staring at him, how you bit your lip when you first met him. You couldn’t keep your eyes off of him all night.”
Your cheeks flamed. You didn’t know he’d noticed that lip bite.
“I’d be lying if I said I didn’t find him handsome, but I promise my eyes are only for you,” you replied, tenderly grabbing one of his hands and holding it against your chest.
“How could your eyes only be mine if you let them stray?” He glowered. You then trailed his hand down from your chest between your thighs, holding it against your warm, panty-clad cunt. Poseidon’s eyes widened slightly at your boldness.
“I think we can both agree that my body is undeniably all yours,” you smirked, looking up at him through your lashes.
“We’ll see about that,” Poseidon grumbled before grasping the waistband of your panties and ripping them off in one fell swoop. You yelped in shock as you felt the fabric tear, baring your cunt to your lover’s predatory stare. Your bra was the next thing to go, exposing your breasts to the cool air of the room.
Poseidon then shoved two of his fingers into your mouth.
“Now suck,” he commanded as he tweaked your left nipple with his other hand. You nodded and sucked on his fingers, thoroughly coating them with your saliva until he withdrew them. Then he parted your legs and delved his two spit-soaked fingers into your cunt. You hissed a bit at the stretch, a sound that was softly muffled by his lips pressing against yours again.
Poseidon roughly finger fucked you, exploring the walls of your cunt like Theseus in the labyrinth. You whined and moaned into his mouth as he did so, arching your back as his other hand groped your breast. He brought you to the brink of orgasm with his rough finger fucking, but withdrew his fingers before you could finish.
As you opened your mouth to voice your frustration, he delved his fingers into your mouth, forcing you to taste yourself on his fingers. As you sucked your own essence off of his fingers, Poseidon stroked his cock with his other hand.
“You obey me so well, little nymph,” Poseidon mused. “Would you ever follow his command like this? Suck your own juices off of his fingers?”
As he fingers still occupied his mouth, you shook your head as best as you could.
“That’s what I thought,” he smirked before he withdrew his hands from your mouth. You squeaked out as he lifted you and flipped you around. Instead of facing the pillows, you were facing the foot of the bed, laying on your tummy. Knowing which position he wanted, you laid your head down and rose your hips up, presenting your ass to him.
You yelped as Poseidon delivered a swift strike to your ass. Immediately after, he tenderly massaged your flesh. Then he delivered another one. And another.
“Poseidon, what are you—” you whimpered out before he possessively groped the flesh of your rump.
“Tell me whose ass this is,” he commanded, his voice low and husky.
“Yours,” you murmured, feeling your cheeks flame as you did so. He swatted your ass again.
“Say it louder,” he said.
“My ass is yours, Poseidon!” You cried out, arching your back even more. He delivered another swift smack to your ass.
“Is it only mine?” He hummed. ”Yes, fuck, my ass is only yours!” You echoed.
“Damn right it is,” he hummed before gently massaging your rump. “It’s all mine.”
He said it so pointedly, as if he was making an example for someone else. You shook that feeling off though, distracted by your anticipation to feel him inside of you.
After dragging his dripping cockhead against your cunt a few times, he entered you in one smooth thrust, causing you to cry out at the sudden stretch. After he bottomed out inside of you, he began thrusting in and out of your weeping pussy.
“Fuck, Poseidon!” You whined, arching your back as his fingertips gripped your ass tight enough to bruise. “What’s gotten into you?!”
Poseidon just tilted your head to the side and bent down, possessively kissing you again. His thrusts did not cease nor did his hips stutter as he did so. When he pulled his lips away from yours, he immediately buried his face in your neck, biting and sucking along your jugular.
One of his arms wrapped under your torso, pulling you tightly against him as he pistoned his hips against your own. His other hand left its spot on your ass and reached down to roughly rub against your clit as he thrusted. You practically wailed and arched your back, feeling overstimulated by the rough onslaught of pleasure.
“Tell me whose pussy this is,” Poseidon damn near growled in your ear as he pinched your puffy clit.
“Yours!” You replied, thrusting your hips back against his.
“Say it louder,” he commanded as his middle finger rubbed the glans of your sensitive pearl.
“My pussy is yours, Poseidon!” You replied. You felt like your face was on fire as he had you admit this. He’d never had you say anything like this before.
“Damn right it is,” he hissed before attacking your neck with lovebites and hickeys again. “Your tight little cunt is all mine. And always will be.”
You shuddered at the finality of his declaration. After you’d sung his praises, Poseidon’s hand abandoned your clit and returned to gripping your ass. He pulled his face away from your neck as well, focusing his eyes on your ass. He reveled in the sight of you thrusting your hips back against his, your ass jiggling each time your hips met. And this sight belonged to him.
As he gripped the meat of your ass, he increased his speed, practically drilling his cock into you. His cockhead roughly kissed your cervix with almost every thrust. His pace was maddening. You could barely keep up.
“Poseidon! Fuck, you’ve got me so close,” you moaned, drool shamelessly dripping from the corner of your lip as you eagerly threw your ass back against his hips, though your speed could barely match his. The ecstatic coil in your core had wound itself so tight that it was destined to snap at any moment now.
“Cum for me, (Y/N); show him how much your pussy belongs to me,” he commanded. When he reached down to pinch your clit once more, you felt that coil snap. You didn’t even process that he’d said him, as if there was someone else in the room with the two of you.
You screamed Poseidon’s name, your hips quaking against his own as your release squirted out, splashing against his weighty balls and upper thighs. You mewled in embarrassment at how intense your release had been. Seeing you unravel so easily in his grasp and feeling your release gush against him was enough to bring Poseidon to the brink of orgasm again. With one final thrust, Poseidon buried himself balls deep inside of you and felt his own release crash down upon him. He released rope after rope of semen inside of you until your pussy was thoroughly creamed.
The two of you stayed like that for a moment, both of you panting as you recovered from your post-orgasmic haze. You were staring down at the bedsheets as you tried to catch your breath. Poseidon had never fucked you like that before. It was absolutely exhilarating.
Suddenly, Poseidon’s fingers grasped your chin and tilted your head up, forcing you to look across the room.
“Did you see that? ” He suddenly asked. Before you could answer his question, he continued. “How she let me claim her little cunt? How enthusiastically she told me her cunt is all mine?”
Your eyes widened in horror as Hades’ unseen presence became visible. Slowly, his body became visible. First his head appeared, then the rest of him slowly followed suit. Your jaw dropped as you noticed the helm pressed between his fingertips. You’d forgotten that he was the original owner of the cap of invisibility.
Hades’ expression was still aloof. The only sign that your erotic display had any affect him was the faint pink blush that had flushed across his cheeks.
“So I heard,” Hades hummed. “And saw. I think it’s clear that she’s all yours.”
“Now, if you’ll excuse me, I need to return to Helheim,” Hades sighed. “Persephone is waiting for me. But thank you for the show. It was quite entertaining.”
Poseidon merely huffed and finally pulled out of your cunt with a loud squelch. You cringed at the sound and the feeling of his seed dripping down your thighs. You felt so vulnerably exposed, even as Hades turned on his heel and began to leave the room.
“I’ll see you soon, brother,” he replied. He did so so casually, as if he hadn’t shamelessly put you on display, showing both you and his brother that you were his and his alone.
Before you could say anything, Poseidon spun you around and pulled you into another rough kiss.
“You’re mine,” he growled against your lips. “And don’t you ever forget it. Unless you want me to remind you like this again.”
You shuddered and nodded your head though shamefully you wouldn’t mind if he did that all over again.
