Doggy Duo

Story by Infernos_Flame on SoFurry

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Another commission from

@Erta

-wanderer where in we visit a pair of Arcanine sisters, both of which get a belly full of eggs from our main POV character, Gregory. Had a lot of fun with this story, and fingers crossed everything goes well, and there should be some more stories of scientific sexiness in the future. And... I now think I have the name for this series: Stories of Scientific Sexiness. Anyway, I hope you enjoy the story as much as I did writing it. It's not every day I get to write feral canids as part of a commission, so I definitely put my heart into it.


“They're a sibling pair, both Arcanines. Serena is herm, and Iris is female. They have a bit of a... unique relationship, and most of the eggs Iris lays come from Serena. Apparently Iris sees her sister as some sort of 'Alpha', or at least as close to one as one can get, outside of that... study..." The scientist says, looking over his notes once again.

“C'mon Dr Ironwood, tell me the important details." I tell him as we walk through the research facility.

“The important details, Gregory?"

“Yeah, what's their fertility rate?" I ask, licking my lips.

“Nearly perfect, they've been able to have cubs from legendaries."

“Really? What did they come out as?"

“Growlithes, as we expected." Dr Ironwood responds.

“Do they have any 'interests'? The sisters, I mean."

“Serena is... is into a bit of leather play, more for the appearance than any actual application in sex. Apparently she likes her partner to know just how... 'bad' of a dog she is."

“Mmmph, sounds like something I use to my advantage." I say, half under my breath, unable to keep a half smile from my lips. “What about Iris, the... submissive one?"

“She loves to be dominated, I believe she likes being fucked on her back, something about looking at her sister's face as she's getting bred. Some of my... colleagues believe it's so that she can't deny who her partner is, that she gets off on knowing her sister is breeding her."

“Naughty girl..."

“Quite," Dr Ironwood responds as we finally get to the enclosure door.

“Remind me, Doc. Where's the other guy? The short, fat one. You and he always escort us to our... play partners."

Dr Ironwood opens the door the the Arcanine's enclosure. “Dr Elm... officially had some other duties to attend to. Unofficially, he didn't particularly want to do another 'escort mission', had 'better things' to do. Which apparently was finding out what colour tray they use for the cafeteria Victoria sponge cake."

“God, he got his hands on that already?"

“Yes, I'm disappointed too." Dr Ironwood replies as he signals into the enclosure, all but telling me to 'get on with it'.

“Ok, ok, I'm going. Jeez, can't a guy take part in office gossip?" I ask as I enter the enclosure, rubbing the back of my head.

“What Dr Elm gets up to is never gossip."

“Ain't that the truth..."

With the slide of a door, I'm left inside the Arcanine's enclosure, the scent of dog already filling my nose. It isn't what I was expecting, not one bit. Instead of a grassy field, or molten lava theme; I'm met by... a lavish hotel. While being a lot larger than any hotel room has any right to be, it is separated into sections by dividers and differences in flooring and wallpaper. The entire room has an overall red and gold theme to it, giving regal vibes to the enclosure.

A large, ornate, lit fireplace is against the wall in front of me, a mirror hung on the chimney's body, with sofas and an armchair encircling it. There is a pair of wide lounge chairs off to the side, and I finally find the two Arcanines, both laying across the chairs. One is laying on their front, keeping her hind quarters away from view, their head slightly lower than the other. She doesn't have any leather on her, so I can only assume she is Iris.

Looking over to the other Arcanine, I'm met by a slightly larger canine laying on her side, showing off her semi-erect cock and balls. Serena is in her leather gear, just like Dr Ironwood had mentioned. Her head is raised higher and she has a generally more assertive aura to her. Feeling Serena's eyes look me over, she licks her lips after a moment. Iris looks up at me for a moment, a glint to her eye, before looking to her sister, lowering her head again. She seems to be waiting for Serena to act first. The larger Arcanine spreads her back legs, showing off her crotch even more as she moves a front paw to her length. Rubbing her pads along her cock, she looks at me, as if telling me to 'get to work'.

“Yeah, that ain't happening, pup." I tell her, taking a few steps towards the two of them. “I'm not here for that dog dick."

Serena growls a little at this, her lips drawing back to show her large teeth, her ears perking up to attention.

“That won't work on me, I know Pokémon are all bark and no bite when it comes to humans."

I move over to the bigger Arcanine, getting to Serena before I place a hand along her back, receiving a deeper growl from the canine. Giving her a 'hush', I grab onto a leather strap along her hips, pulling it so that Serena's back end turns anticlockwise, her back paws now flat against the lounge chair. Grabbing onto her mane of fur around the back of her neck, I push her head forward a little, lowering her overall stance.

She's still growling at me as I do this, but she's quieter than before, her teeth still bared as I move my hand across her side. This seems to calm her down a little, her ears folding back slightly against her head. My hand repeats the action, now a little lower, my fingers rubbing up against a couple nubs of flesh underneath her coat of fur. A half whimper escapes Serena's maw, followed by a small growl, but I'm unsure if It's towards me, or herself.

“There, ain't that better?" I ask Serena, before looking over to Iris. “See? I don't think your sister knows how to actually dominate someone, I think you lifted your tail and she took her place inside you."

Iris looks her sister over, her eyes wide as she watches her sister let someone else on top.

“Don't be ashamed, some pups are just made to lift their tails. I think it just lead to your sis not learning how to take control. You gave her control, instead of her taking it." I move over Serena's body, my lips coming close to her ears. “And I'm sure you don't mind some one else being 'top dog', do ya, pup?"

The Arcanine growls again at this, but it's undermined by another whimper as my hand continues to travel her belly. Moving back from her ear, I return my hand to her back, letting it run up and down it, licking my lips as I feel the muscles underneath her warm fur. Moving down to her rump, I grope her ass tightly, getting a small moan from the canid.

“You like that girl?" I ask, grasping her again, making the canine whimper again.

She gives a small moan, blushing as she looks over to her sister, her ears folding back in embarrassment.

“Awww, don't you worry, I'll make sure your sister sees a lot more of this side of you..." I grip the leather straps just above the Arcanine's ass, pulling her backside up, her tail waving up and down a little as I do so. “Now, raise that tail, puppy. Gotta get a good look at your spade."

The Arcanine's cheeks burn in blush as she slowly raises her tail, barely enough to get a glimpse of her cookie, let alone a proper look. Giving her a moment actually follow my order, I draw my hand back and give her ass a mild slap, enough to make a mild 'cracking' sound as I do so. I give her the order again, my voice a little more stern this time. This makes her yelp and lift her tail as high as she can, showing off her wet black spade and large balls, her canine folds tightening on occasion. With a bite of my lips, I keep my gaze on her ass for a few seconds, before looking up at the canine.

“Good girl, isn't it so much easier when you comply?" I ask as I kneel behind the dog's ass, groping the spot I slapped, getting another whimper from the Arcanine.

I love the glisten of the canine's pussy, the way it tightens and almost begs for attention. Giving the Pokémon a few seconds, making sure she really wants it, I finally move forward and grind my face up against her backside. The scent and taste of canine spice soaks into my skin, as I lick up into the Arcanine's spade, digging my face against her warmth. This is enough to make me addicted to Serena's backside.

My hands go to her backside, spreading her cheeks open, letting me delve into her cookie even more. Her juices practically squirt into my mouth with every lick at her spade, tempting me into another, and another. With every movement, I draw out a whine from the Arcanine's maw, her body shifting against the leather straps that cover her body. Her canine pussy is so hot against my face, causing me to moan out against her spade, feeling my desire grow.

Taking a few minutes to pleasure her, I finally pull back, her juices covering my lips and mouth. Cleaning my face with my sleeve, I look over the Arcanine's body, taking in her trembling body. She looks so good with her ass up, wordlessly begging for a cock to fill her up. Moving myself onto the lounge chair, I look down at my cock tip, pressing up slightly against the dog's hot, wet, canid cookie.

“Hey, why don't we get your sister in on the action? Bet she wants to get some attention too." I say, turning back to the other canine. “Hey, Iris. Come get under your sister, I bet her cock is awfully cold without its cock warmer."

The Arcanine's ears fold back at being referred to as a 'cocks warmer', looking a little shy. But with a small blush of her cheeks, she gets off of her lounge chair, and slowly makes her way over to us. Once she gets to us, she looks between her sister and I, as if waiting for something to happen. I grin down at Serena, licking my lips once again.

“You're gonna need to raise your upper half, pup, if you want the both of us." I tell the Arcanine.

With a small growl, Serena slowly raises her front, her paws extending their claws as she follows my order. Iris slowly moves underneath her sister, nuzzling upwards against the bottom of Serena's maw and neck. This sign of affection makes me smile as I move down slightly, grabbing onto the Arcanine's erect cock, aiming it against Iris' hot pussy.

“I know pups like you can have trouble with your aim, would rather you not spend minutes just trying to get it in." I say, as I finally connect the two, making sure Serena pushes an inch or two into her sister's body. I move back up a little, placing my hands onto Serena's ass cheeks. “There we are, hope you don't mind if I set the pace? Well, not that you have much of a choice, that's kinda the point."

Slowly grinding my length up against her spade, I shiver at the contact between my length and it. I love the texture and warmth of an Arcanine's pussy, and already know that Serena's gonna be tight, I can only hope that she's loud too. Gripping the canine's ass tightly, I slam myself toward, pushing Serena forward into her sister's hole. Her warmth and wetness envelopes me, just as her sister's doing with her cock. I shiver as I do this, pleasure radiating through my body, making me take a moment to recover. There's truly nothing like a Pokémon's pussy, especially an Arcanine's. The smooth texture of her insides, the sheer heat and wetness surrounding my length. It truly feels divine, and no matter how many I take, it always takes me by surprise.

Breathing deeply above the two canines, I gather myself and start to pull myself back, bringing Serena partially me. Gulping deeply, I start thrusting into Serena, the sound of her and Iris' pleasure filling the room. A series of grunts escape my mouth as I build up a rhythm, baring my teeth slightly as I go. Thrusting myself into Serena, pushing her into her sister's depths, before pulling the both of us back. I huff and pant as I increase the tempo, becoming slightly rougher and harder as I go.

I give Serena's ass a harsh slap, feeling her pussy tighten around me as she yelps. The Arcanine looks back at me and growls deeply, her teeth bared once again. I slap her ass once again, this time harder. This causes her to yelp louder again, followed by a deeper growl. With a slight increase to my thrusts, I manage to speak up to the canine.

“Careful pup, the more you growl, the harder I am. Unless... you want me to be rough with you?" I ask, almost teasingly. “Is that it? Do you want me to slap your ass harder?"

Serena growls again, but turns to look forward, slowly silencing her snarl.

“You hear that Iris? Your sister loves getting her ass slapped, guess she really is all sub and barely any dom." I tell the other Arcanine, slapping Serena's ass once again, getting a whimper from the Pokémon.

Pushing my body further and harder, I continue to slap Serena's rump, turning her whimpers into full blown canine moans. I feel Serena tighten and quiver around my length, making me tremble as the canine seems to be getting close to cumming. Moving over her body, I place my lips next to the canine's ear.

“Getting close? Come on baby, give your sister what she needs..." I tell her, biting onto her ear, to simulate a canine partner.

This seems to push right to the edge, making her while body tighten up, pussy included. I use this to my advantage, thrusting myself faster into her pussy, wanting nothing more than to climax along with the two canines. Slamming myself up into the canine's hole, I half push myself into an orgasm, being met by Serena and Iris experiencing the same rush of pleasure. Juices squirt against my cock, balls and inner thighs, drenching my skin in Pokémon lust. The Arcanine's howl up into the air as we cum, my seed spilling into Serena, and her jizz shooting into her sister's womb. Iris' howl heightens in pitch, as I can only assume her sister's knot finally ties the two together, locking them into the incestuous act.

“Oh fuck... fuck... such a good girl..." I moan out as I push through my orgasm, spurt upon spurt of seed shooting up into Serena's womb. “I... I fucking... love my job..."


(The following day)

I finger Serena's asshole as she trembles above her sister, moaning out deeply as she mounts her sister's rump. I'm laying across the lounge chair as the two canids stand next to me, in the midst of another incestuous romp. Their bellies are bulging with eggs, both of them wobbling and shaking with each thrust and movement.

A large egg is already halfway out of Serena's spade, while her cock is buried deep into her sister's anus. Iris has a similarly sized egg halfway out of her pussy too, trickles of pussy juice running down the surfaces of both of their eggs. The both of them seemingly having some difficulties in birthing their eggs, whether it's due to the size of their eggs, or from the pleasure of giving birth.

“Such good girls, that's it, fuck her nice and deep." I whisper into her ear, digging my digit into her ass even harder. “Bet it feels amazing, having the egg grind up against you from her vagina... taking up so much space you can barely fit yourself into her ass."

Serena whimpers as she humps into her sister once more, her hips moving weakly as the egg moves a centimetre out of her pussy. The Arcanine keeps herself deep in Iris' ass for a few moments, giving me a quick idea. With a devilish grin, I move my hand down to the canine's balls, grabbing onto them before I rub them up against her sister's egg, making the canine whimper softly before giving me a confused look.

“What's the matter puppy? I thought you'd love nothing more than 'marking' your property..." I whisper into Serena's ear, getting another soft moan from the canine. “Just think, no one would ever mistake your sister's egg for anyone else's, than yours."

Serena whimpers again, straining as she pushes herself forward, seemingly trying to knot her sister's ass. Straining more and more, the Arcanine's head rolls back and huffs, whimpers becoming high pitched and needy. Smiling softly, I decide to give the canine a bit of mercy. Moving my hand to Serena's knot, groping it tightly, simulating being inside a warm hole. As little interest as I have with the male anatomy, I seem to do a somewhat ok job.

Serena howls out softly, juices squirting out from her folds as they contract and push the egg in and out of her pussy. This finally gets the egg out of her love canal, dropping onto the carpeted floor with a soft thud. Rolling across the floor, it takes my attention for just a moment before I turn back to the two Arcanines, knowing that there must be a few more eggs inside of Serena and Iris. There's never just one when it comes to Arcanines.