Yena tossed Collider down onto the grass and looked at him. From where she was standing, the orange pony was looking quite afraid. And he should be. She was larger than him, and had more weapons than him, that being her claws and teeth. Though, as she was standing there, she saw his eyes look downwards, and his cheeks flush red. There was a reason for that.

“Sweet Celestia....what...what is that?!” Collider mumbled to himself, his eyes locked on a sheath between the dog’s legs. He was certain she was a female, but maybe she wasn’t? The thought of her being a futa had not crossed his mind, but now he just couldn’t stop staring. It got to the point that it was almost rude, gazing at the area where her canine cock was residing.

It was also quite obvious to Yena what he was doing, and she blushed and growled loudly, before letting out a rather sharp bark. It seems she was quite the dog, as her bark caused the Pegasus to jump a little and return his attention to her eyes, which seemed to be ablaze with anger.

“Listen here, pipsqueak. I don’t appreciate you staring at me like some sort of model. Though, I was gonna show it to you anyways, so I guess you better get acquainted with it. Because it’s going to be inside of you in a little bit. Can’t have you disturbing my work so I’ll have to shut you up.” The diamond dog said in a smooth tone, placing a muddy paw on Collider’s head and gently rustling his mane. “We can either do it the fun and easy way where I lay down, you lick it a few times and then ride me...or, I fuck your face like I would fuck a bitch or mare, and then I take that little hole under your tail and treat you like a mare.” She said, before crossing her arms and gently tapping a hind paw on the ground. “Times tickin, pal.”

For poor Collider, all this news was hitting him like a bag of bricks. Falling off a tree. Onto his face. First off, this Yena was a futa, and secondly she was going to fuck him because he asked her to stop working? Diamond Dogs must get into brawls over asking one another for the time of day if this was anything to go by. He didn’t particularly feel like getting fucked, so he tried to persuade her into a peaceful resolution.

“Well...how about I just leave and pretend I never even met you? Yeah, that sounds like it could be a fair option. After all, it’s much easier to forgive and forget as opposed to holding a grudge....”

The Pegasus continued to talk and negotiate, and Yena rolled her eyes. She felt like shutting up the pony, and so she would. Gently wiggling her hips, she simply watched his face as her member began to erect. That would probably silence him. And maybe he would have his mouth agape in surprise, so she wouldn’t have to force it open. That would be a nice surprise.

“.....and so that it why I think...you should....let.....oh my.” Collider Flarespark was cut off as he found himself now gazing at her length. It was red. Quite red. And it even had studs running down the sides of it. The tip was an odd shape, not like the flare of ponies. What really made it odd was the knot. It was, well, like a knot in some rope. Near the base of it, it was quite wide and the Pegasus wondered if that was supposed to go into the partner of a diamond dog. He hoped not.

“Well, here it is. The best tool I have at my disposal. It can’t break rocks, well...maybe it can. Haven’t tried that yet. It does break minds though. Hope you don’t have anything on yours, ‘cuz it’s about to be wiped clean.” Yena said, a hungry look on her face as she approached the Pegasus.

Collider was either too scared or too intrigued by some sick fascination, so he didn’t move that much as the dog pounced on him. Somehow, he had ended up on his back, and lower torso was resting peacefully above his snout. Her hefty balls were clouding his eyesight, and from down here all he could smell was dirt, and sex. Mostly dirt. Which didn’t come as a surprise because she was in it most of the time.

“Now open wide and stick that tongue out.” She demanded of the nuisance, who was quick to comply. Maw wide, tongue extended like some sort of red carpet at an award’s show. Yena grinned a toothy grin. She only had a few interactions with ponies before, but there was mostly like this. And she loved every second of them.

Dropping her hips downwards, the canine essentially sat on his face, but in such a way that it sent her shaft down, straight into his throat. A bulge appeared in his neck where her member had gone, and the dog let out a soft whimper of sheer enjoyment. The warm and wet cave of his throat was heavenly to her, and she hadn’t even started thrusting yet! This was going to be a very enjoyable encounter for her. Maybe she could convince him to stick around for later.

As for Collider, he wasn’t expecting her shaft to be that filling. It entered his throat and lodged itself there, almost causing him to seize up and gag hard. Luckily for him, he wasn’t the worst at surpressing his reflex to hack up and cough violently, so he held on. She sat for sometime before pulling out, giving the stallion a chance to gasp for air and spit up some rather thick and sticky salvia. Sadly, the moment of breathing was gone as she dropped back down. This process was repeated slowly, and the Pegasus felt his face becoming a mess of spit, mud, and what was most likely pre cum, curtesy of Yena’s dripping tip. Though, for some reason he wasn’t hating the entire process as much as he thought he was, and so he found himself actually licking her shaft whenever it was inside of his muzzle, which made it all the more enjoyable for Yena.

The diamond dog was wagging her tail in joy, much like an actual dog would, as her member pulsed and throbbed, nearing an orgasm.

“Unnf...fuck...that’s good..~” She said to herself, fucking the Pegasus’s face faster and faster now. And then suddenly she pushed down as hard as she could, and a loud and wet pop was heard as her knot entered past his lips and went somewhere inside of his mouth. Her balls clenched and her claws dug into the tree as she climaxed into the throat of the pony.

For Collider, the knot luckily didn’t end up in his throat, but it was somewhere near the back of his mouth and he couldn’t move his head at all due to how it was lodged firmly in his gullet. He felt her length shudder and let out a whimper as her thick and sticky semen pumped directly down into his stomach. Soon, he was feeling very full and very bloated, yet Yena didn’t pull out. Or rather she couldn’t. The knot was keeping her member inside of him.

“Haah....ahhhhn...h-hey, that was actually pretty good, for a pony.” Yena complimented, before she wiggled around a little, trying to pull out. As her knot slowly shrunk back down, she stood up, her member removing itself from his throat with a rather wet sounding noise. “We aren’t done here yet. I still gotta take your other hole~”

“Gah...w-what?” Was the only response Collider could formulate, as his world was still spinning from the rough face fuck. So he couldn’t really do anything when the dog began to move him around. The position she chose was luckily a comfy one, with Yena sitting down on her rump and Collider resting his rear against her crotch.

“Let’s get started~” Yena cooed, and propped his butt up so she could see her target. Moving his busy black tail away, she spotted the tight little hole and grinned. Popping the tip of one of her claws into her mouth, she suckled it for few seconds before gently poking the hole, rubbing it as she teasingly pushed the tip of her claw against his ponut, careful not to hurt him with it.

That seemed to get some moans and whimpers from him, and a little bit of struggling as he still wasn’t entirely on board for this idea. That would change sooner or later, Yena speculated, as she placed both paws on either side of his supple flank and pulled him up closer, before licking his tailhole with her long and wet tongue, even going so far as to push said tongue into the hole.

“EEP!” The Pegasus squeaked out, his face a deep red now as the dog behind him was doing whatever she saw fit with his rear. Though, in the back of his head he was grateful she was doing this instead of pushing in without any preparation and possibly injuring him. His own shaft was fully erect now, the brown mottled shaft forming a pool of pre underneath him. Clearly he was enjoying this, despite what he was trying to tell himself and tell Yena.

“There, got you all nice and wet now. You’re welcome. And normally I don’t do that for ponies, but you were such a good little stallion and swallowed off my seed that I had to give you some sort of reward!” She said, before spreading her legs a little to let her member emerge, and press against the rim of his hole. She bit her lip and dug her claws into his flank, maybe a little too roughly, before pulling down.

The feeling was a mix between pain and pleasure. The red and angry looking dog dick pushed down into his innermost depths, spreading his insides and getting to work rearanging them. The shock of the penetration had taken his voice away and now the pony could only let out silent moans and whimpers, as Yena gently moved him up and down upon her length. At least she had the generosity to get him ready and go slowly for the first little bit. Howeve, the loving and kind sex was about to get replaced by something that one might see on a nature documentary about wild animals during their mating sessions.

With the Pegasus firmly impaled on her cock, Yena suddenly jolted forward, sending the pony face down into the grass, with his rump in the air. As for the diamond dog, she was standing over him, in a prime position to ruthlessly dominate him as she saw fit. And dominate him she did. The once gentle and slow bounces upon her member turned into her shoving it knot deep against his hole, which was by this point taking quite the battering. Her hefty balls smacked up against his own, and Yena smiled as she looked at then pony, who was drooling on the ground, either in some sort of shock from the immense pleasure. Or pain.

For Collider, the whole world was spinning. And melting at the same time. A few times he had tried to stand but his body refused to work with his brain. Or maybe his body was working but his brain was just being deep fried in pleasure right now. Whatever the reason, he couldn’t move from his spot, not that he would want. His inner walls were now clenching and releasing on their own, offering more pleasure to the large mutt who was atop him.

Yena let out a few howls, barks, and growls of pleasure, and suddenly she shoved her knot inside. Though she wasn’t done quite yet. To add more pleasure to this, she began to fuck him with the knot, though this became increasingly difficult as it swelled more and more. Intent on painting his insides white with her love, the dog slammed home once more, and firmly knotted his poor pucker, before hitting her climax.

Collider got his own at around the same time, the pool of pre beneath him now a lake of sticky and warm horse seed. His whole body was radiating warmth from the stomach full of dog cum Yena had just given him, surprised she had that much after her first climax.

As always, the knot kept the two tied together, and she Yena slumped forward, draping her body over his own. Gently nibbling his ear, the dog spoke to him in a quiet and gentle tone.

“So. You doing anything later tonight~? I’m off work once I finish digging these trenches. I’d love to hang out with you some more.”

And to Collider’s surprise, he found himself answering her with something he didn’t think he would say in a million years.

“Sure thing~”

Author's Note

There we go. At the request of the one who asked me to make this, I will make it public. And as always, please tell me what you thought!

This was really fun to make, and I might actually write more about one or both of these characters.