Monster's Pet
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Swimsuit party gone wrong
🕑 Added 2025-01-03 15:30:01 +0000 UTCMerman x chubby fem!reader || oral sex, heat, double peens, double penetration || tw: fatphobia
You were crying on a rock.
You were sure it was a bad idea to come to a party where the dress-code said “swimsuits”. Your body didn’t look normative, and everyone made sure to let you know that’s how they felt. The backhanded compliments like “you are so pretty… but you’d be prettier if you lost some weight”. You were so, so tired of those comments, of the looks, of the giggles when you passed. Your friends assured you it wouldn’t happen in this party, but it did. It always did.
So you were crying on a rock when he appeared.
At first you thought it was a mess of algae floating in the water, but when shiny blue eyes rose from under them, you understood it wasn’t algae, it was his hair. A merman’s hair.
You’d never seen one before, and the first look at his green hair and weird fish-like aspect made your body tingle. You craved him, you didn’t know what it was about him, but your body was burning and you felt like you could groan if you opened your mouth. Which you did, trying to say hi, but as expected, only a needy groan escaped. He smiled at you, his too pointy teeth making you shiver. He was so creepy, but so very beautiful. You were mesmerized.
“Why are you crying?” His voice reverberated in your brain, he didn’t talk out loud, and that made you jump from your position, startled.
And just like always happened to you, as soon as he asked, you started crying again. He approached, slowly and tentatively, but by the time his hand touched your thigh, your body sagged. It was like all you needed was his touch, and in that fraction of a contact everything poured down.
You told him about your insecurities, about how you didn’t feel attractive in your fat body, and with each word his frown deepened and his eyes got more and more dangerous. When you finished, you weren’t crying anymore, but he was very much angry.
“You should pay no mind to those stupid humans, you are mine,” he growled out loud, ringing dangerous and making your whole body burn. You let out a groan, and his eyes darkened. “Now, now… Someone is entering their human heat, isn’t she?” He asked rhetorically, his smirk growing bigger. You didn’t know what a human heat was, you only knew you needed him more than you needed air. “I knew you’d be the one as soon as I saw you on the beach. My dicks sensed you, they pointed me to you. And now I’m going to claim what’s mine. Are you ready to be my treat?” You nodded, unable to form words. Your brain was melting with need for him.
He parted your legs, moving between them as he pushed your back against the warm rock, the sun warming your skin as he lowered his head, pushing your panties to the side and ate you out without preamble. You screamed with abandon, grabbing at his hair as he devoured you. He was a professional eating pussy, his ridged tongue teasing and rubbing, sending you over the edge faster than any human ever could. And while he did so, his hands never stopped groping and caressing every fat part of your body. It was exhilarating.
He pulled back, his face wet with your desire and his eyes blown wide. He was moving his hand and when you looked down… “You… that… It’s too big,” you let out, concerned when his dick appeared in front of you.
“Don’t worry, my treat, I’m made for you the same you are made for me,” he said as if that was an explanation on how he was supposed to fit inside of you with...
“You have… You have two,” you finished, your mouth gaping as you stared at his crotch.
“And they are both going to find their home inside your warm heat,” he replied, pinching your nipples as he found your puckered hole with his finger. “My seed will help, it will stretch you out,” he added, making you more confused but as soon as his finger graced your clit you didn’t care anymore.
He pushed inside, using some of his magic precum to stretch your virgin hole. It felt weird, but weird in a way that made your body tingle and your mouth let out a surprised moan. In an instant, you were rocking against his hand, another one of his fingers fitting inside of you, scissoring until you were stretched and needy. He never stopped touching your body with his free hand, telling you all the ways you were beautiful and hot, telling you how he would do anything for you. And you craved it, you craved him.
“Now, now, now… I’m ready, please,” you pleaded as he chuckled.
He positioned himself, both hands occupied with his dicks as you held your legs back, exposing everything to him. He grunted, as if it was painful to see you like that. It made you feel hot, it made you feel desired, and when the tip of his cocks were against your stretched needy holes, you cried out. He pushed inside and you saw the whole galaxy behind your closed eyes. He didn’t hesitate, he fucked you like a machine, like a monster.
Your holes felt so full, your whole body reacting to it, shaking under him as his tail trashed under him, sending waves of salty water over the rock, making everything wet and warm and inviting as he fucks you dumb. You’d never felt so good before, your whole body clenching on him as he grunts and groans, whispering sweet nothings into your ear as his teeth found your boobs, biting and marking you.
Your next orgasm caught you off guard, your brain melting as your throat pushed out the loudest cry you ever let out, probably alerting everyone close what you were doing there. But you didn’t care. You wanted everyone to know that this hot merman was fucking you stupid, that he liked your body just like it was because it was beautiful even if it wasn’t thin. And good goddess if that didn’t send you higher in your peak.
He fucked you through it, until your legs were trembling around his middle and his cocks were twitching inside your used holes. And he kept going. And going. And going for another two orgasms, milking every bit of pleasure out of your pliant body before thrusting erratically and going over the edge himself. His cum was warm and tingly, magical inside of you. But as soon as he was back to himself, you felt his dicks twitching inside of you again.
“You… again?” You asked, your holes clenching around his fast filling dicks inside of you.
“As many times as it takes for you to believe how beautiful you are, my mate,” he whispered, rolling his hips and making you see stars again.
By the time he was done with you, you had zero doubts how attractive he found you, how hot he thought you were… and how warm his come overflowing your holes felt.
