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florencebirdsong · 1 month ago

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Established Jealousy

Agatha Harkness x Rio Vidal x Reader

Agatha All Along Week 2025 - Day 1: Jealousy

Summary: Agatha comes home to find Rio two knuckles deep in you. She isn’t impressed.

Tags: Established polyamory, grinding, fingering, oral, orgasm denial, voyeurism, magical bondage, Mistress Agatha, Sir Rio, Sub Reader

She/her pronouns used for Reader. Pet names - love, pet

Words: 2,464

Authors note: Happy Agatha all along week!! Please enjoy my humble offering

ao3 | masterlist

You gaze aimlessly out the window as you lay on the bed. Agatha is away doing one of her more elaborate traps, apparently she found a particularly powerful witch who has been keeping herself successfully under the radar for decades. You’re bored out of your mind. Your own fault for saying you wanted to stay home instead of joining her in her latest feeding, but at the time all you had wanted was to stay snuggled in bed. Three days later and you miss your wife. You’re also pouting just a little at not getting to watch her siphon. She’s as captivating as the first time you watched her siphoned someone.

A pressure begins building outside and you frown. It’s the usual feeling of someone with immense magical power who isn’t hiding it but it most definitely isn’t Agatha. It only takes you a few more moments to place who the power is emanating from. Rio.

You sit up eagerly. You’d recognise her presence anywhere. She rises from the beds shadow and you grin at her. She’s never been one for doors (except when she’s pissed off Agatha). You take her in eagerly. She’s in one of her slightly more modern outfits with a green jacket and thin vines snaking along her pants. A smile stretches wide across her face. She’s in one of her giddy moods.

“Love!” she exclaims and squishes your cheeks between her hands. “How’s my littlest love been these long days I’ve been away?”

Rio had taken to calling you little the moment she learnt how young you are compared to Agatha, which is centuries.

“Good,” you say, your words slightly distorted due to your cheeks being squished. “Missed you.”

“And I’ve missed you,” she places a quick peck on your forcibly puckered lips before asking, “And where is our sweetheart?”

Her grips lessen as she looks around. You can feel her reach out with her magic. She would’ve sensed if Agatha were home long before she got here but it’s still cute to watch her double check.

“Off siphoning a coven,” you say. “She should be home in a day or so.”

“Perfect,” Rio murmurs and pulls you in for a kiss.

It’s not her usual response to Agatha being away but you’re too distracted by her soft lips to question it. You happily lean into her, your hands creeping under her jacket and then up her shirt to feel her cool skin. You try to pull her closer but she pushes you back instead. You follow her lead and lay down, wrapping your legs eagerly around her hips when she climbs between them.

Agatha hasn’t technically forbidden you from touching yourself this time but she’d been so intent on outsmarting the latest witch it might have slipped her mind. Or she purposely said nothing so she had someone to punish while on a big siphoning high.

Either idea excites you. If she genuinely forgot and you’ve behaved, the reward will be mind-blowing. If she did it on purpose, she’ll trick you into breaking a rule before punishing you stupid. Either way, you’re needy and have no intention of stopping Rio.

She’s quick to remove your shirt and grope your chest, her lips never far from your own. She plays with your chest until you’re grinding up against her in need. She rips your pants and underwear off instead of taking the time to remove them. Her fingers find you soaked and she growls. You gasp into her mouth as her wet fingers circle your clit. Rio pulls back just far enough to watch your face as her hand dips lower and she pushes two fingers slowly into you. You mewl when she’s two knuckles deep. She always makes you feel fuller than she should.

Movement catches the corner of your eye and you turn your head. Agatha stands in the doorway, power pulses off of her. She’s fresh from a feeding and ready to burn off the euphoria. She also looks less than impressed.

“Is two days all it takes for my pet to get desperate enough to start humping someone else?”

Your hands tighten on Rio’s shoulders. You’ve always found Agatha’s ability to get jealous about you and Rio more than a little amusing. It’s best not to push her but fuck when she greets you like this you want to do it all the time.

“A bit past humping,” you say.

Rio punishes your cheek with a curl of her fingers. You whimper.

“Only having a taste, sweetheart,” Rio says like she isn’t deep inside of you.

“Three fingers is hardly a taste,” Agatha scoffs. “No doubt you were planning to devour her until I interrupted.”

“I’ll show you exactly how far I was planning to go,” Rio says.

A threat, a promise and a goad all in one. Agatha’s eyes trail your limp form as she considers this, or considers how she’ll stop Rio.

She’s a vision. Her pupils are blown, her hair thicker from the crackling magic in the air and she’s in her witch robes. You can feel the magic pulsing off of her. You want to taste it on your tongue. She gestures for Rio to continue.

Rio starts pumping her fingers again. Your hips lift to meet her thrusts but you can’t look away from Agatha. She draws closer without taking her eyes away from where Rio’s fingers disappear inside of you. Having her eyes on you makes the pressure build even faster. Rio swipes your clit and your nails dig into the soft leather of her jacket, your mouth falling open as you pant.

Agatha finally looks at you. “Are you getting close?”

Agatha is always aware of how close you are. It’s like she has a sixth sense for it. But you nod anyway. There’s no need to get in even more trouble. If you’re in trouble at all? It’s hard to tell when she’s like this. Rio continues to lightly play with your clit as she thrusts into you.

You’re moments away from tipping over the edge when she pulls away. Her wet hand moves to your hip to hold you down as you whine and squirm in protest. Your hips desperately searching for the slightest bit of friction to send you over the edge.

“I see,” Agatha says, “And how many times were you planning to deny the poor thing?”

Poor thing. That has to mean she’s feeling merciful, right?

“Until you came home,” Rio says.

You whimper at the idea. Agatha is home two days early. The amount of times Rio could have edged you would’ve driven you insane. Agatha’s eyes darken and she licks her lips. She likes the idea.

“Don’t let me stop you,” she says, in a way that shows she’s still slightly agitated.

“Mistress—” you try to beg but she waves her hand and the connection between your mouth and brain is gone. It’s rare that she doesn’t allow you to make any noise and the whine that escapes you proves she still wants to hear how desperate you are.

“My love,” Rio says, voice soothing. “I only wanted for you to come home to an incredibly desperate pet.”

“She gets plenty desperate from my absence,” Agatha says with a tight jaw.

“As desperate as this?” Rio pointedly runs her fingers through your soaked folds.

She gathers your wetness and lifts her fingers to show Agatha. The humiliation goes straight to your clit. Your legs unconsciously close tight around Rio in an attempt to get even a bit of pressure on your aching centre.

“If she’s been naughty.”

“Does listening to her Sir make her naughty?”

Agatha steps close enough to grab Rio’s chin in a tight grip. You can see her sharp nails digging in.

“Yes, when her Sir is also being naughty.”

You’re definitely in trouble then. The way Rio is looking at Agatha tells you she isn’t going to be any help. The borderline worship on her face means she’s in the mood for obedience, despite how she started this play. Which means she won’t allow you to come purely to piss Agatha off.

“Tell me to stop fucking her and I will.”

Agatha scoffs and shoves Rio’s head to the side. “Antagonistic as ever.”

“Whatever helps to keep you entertained.”

“What will entertain me most is my pet spread out below me,” Agatha says.

Rio huffs a laugh and climbs to lay by your side. She has to force your legs to let her go.

“Don’t let me stop you,” Rio gestures to you. It’s an effort not to squeeze your thighs together. Agatha gives Rio a long look. There’s no doubt some mild mischief on the way and Rio actions are verging on a command. Purple wraps around Rio’s wrists and yanks. She goes from lounging on her side to stretched out. She laughs again. She doesn’t fight the hold.

Agatha straddles you, still in her witch robes. It glides against your bare skin. The magic still rolls off of her. You shiver.

Please, Mistress, you beg. There’s no way to know if Agatha is currently in your mind or if she knows what you want from your expression.

“Does the naughty pet think she can ask for things?”

No. You don’t stop your pleading look. Agatha snorts and flicks her wrist. Her robes disappear. Electricity races where she touches you, the magic jumping from her skin. You arch into the feeling. Agatha’s purple forces you back down.

Her cold hands trail over your skin, her eyes admiring the effect Rio has on you. Her hands dip lower and you tense in anticipation. Her hands stop just below your waist. You try not to pout. Based on Agatha’s crinkled brows you fail. Agatha stays perfectly still and it takes you all of a second to realise it’s not a tease. Neither of you had been paying attention to Rio. A mistake.

“Rio,” Agatha snarls.

“She’s spread out below you, isn’t she?” Rio asks smugly. Her fingers sneak below Agatha’s just to show she can before moving behind to reach where you’re aching. She traces patterns just above your twitching clit.

Agatha’s magic sparks but it’s quickly swallowed by Rio’s green. The purple around your wrists is replaced by green that dances up and down your arms.

You hadn’t been expecting Rio to merely give in to Agatha’s commands, you all know that Agatha finds a fight much more entertaining than easy submission, but you’ve never seen her freeze Agatha like this before.

Rio’s fingers find your clit and you stop thinking about it. Agatha will slowly undo the spell Rio used whether you figure it out or not. You want to enjoy Rio’s hands before Agatha forces her to stop.

Rio runs light, teasing circles around your clit. You try to press closer but you can’t move far with Agatha on top of you. You feel Agatha’s eyes burn into you. The way they trace your face, your heaving chest, where Rio’s fingers play with you. You should probably do something to stop Rio, or at the very least resist, so Agatha doesn’t punish you for it later but what can you do against a cosmic being?

Rio buries her fingers inside of you and you moan. She keeps fucking you and you think she’s actually going to let you come. Then she stills. You whimper and whine and try to fuck yourself onto them but her magic presses you down. She won’t let you come until she decides that you can. Or until Agatha takes over.

You notice a warm, wet feeling against your stomach and you look down. Agatha is wet. Rio follows your gaze and smiles slowly.

“Someone’s enjoying herself,” she says.

“Well it’s certainly not our pet,” Agatha says waspishly.

“We both know she loves the torture.” Agatha doesn’t say anything so Rio continues. “Why don’t we help you out a bit, hm?” Rio turns to you. “You want to make your mistress feel good, right pet?”

You nod eagerly. The caressing magic around your arms seeps into your skin. Your arms move without your say. Your hands land on Agatha’s hips and tighten. You watch with wide eyes as you move Agatha’s hips to grind against you.

Agatha looks furious but there’s no hiding the way her wetness grows. Rio’s fingers start moving again and your hands grip Agatha’s hips tight enough to bruise. Thankfully, Rio’s spell keeps your arms moving. Your ability to set a regularly pace is rapidly disappearing under her fingers and Agatha might’ve killed you for it.

There’s not enough friction for her to come but her breathing gets heavier and her face begins to flush. You watch, captivated even as your own orgasm grows.

Heat rises. You know the pleasure is going to end in another edge but you sink into it anyway. It feels too good to resist. You still writhe and squirm and whine when Rio pulls away. It doesn’t sway her.

You thought the heat was from your own rising orgasm. It’s only as it slips away that you realise that it’s coming from Agatha. Her magic radiates warmth as it undoes Rio’s spell.

The furnace turns into a roaring fire and Agatha breaks free. Rio is pinned to the bed by her neck in a second, Agatha’s snarling face inches from her own. Rio’s pupils are blown.

“You think you’re so clever,” Agatha snarls.

“Not as clever as you,” Rio says.

Agatha falters for a moment at the frank honesty, but only for a moment. “You’re not going to be able to walk by the time I’m done with you.”

“As fun as that will be, isn’t there someone else needing your attention?” Rio’s eyes flicker to you. You try to look as pathetic as possible. Agatha grinds her teeth.

“Make it up to me,” she commands Rio. Sir turns to you.

“You want to come?” Sir asks. You nod eagerly. “Then eat out your mistress.”

You try to push yourself up but your shaking arms give out. Agatha snorts and pushes you onto your back.

“Hold your tongue out,” she commands as she climbs on top of you. You obey and watch with eager eyes as she moves above your face. “Don’t move,” Agatha warns. You wouldn’t dare. Her taste fills you as she grinds against your face. You fall into a haze of her smell and taste as she uses you.

Agatha is halfway to orgasm when you feel Rio’s hands creeping back up your thighs. She’s cruel enough to tease you before slipping two fingers back inside. Nothing feels better than this. Than being surrounded and consumed by them.

“Come for your owners,” Rio says.

You arch into their embrace.

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