Kat had been working in the shed out back, meticulously fine tuning a new device when Coop came barging in, what she had been working on was something special, this new device could temporarily upgrade anything it zapped and the sudden break in concentration had led to her dropping it. Zapping Coop in the process and turning what should've been a normal day into...

"Coop…" Kat said, staring wide-eyed, her jaw almost ready to hit the floor.

Her glare told him something was horribly wrong and this was further reinforced when he noticed he was now, for some reason, eye level with her.

Quickly inspecting himself Coop did a double take as he saw his hands had been replaced with claws and his arms were a marshmallow white his whole body also feeling distinctly more limber.

Knowing something wasn't right he ran towards the house's glass door to see his reflection, noting he was much shorter and more importantly, running on all fours as he did so.

Once Coop reached the glass and was able to see his reflection he almost wished he hadn't. Staring back at him was a Catnipian just like Kat. The only difference was he was ice white to Kat's pinkish hue and with less feminine curves to his body.

Coop stared in disbelief for several seconds before letting out the loudest scream he could muster, or at least he would've if a paw didn't abruptly cover his mouth.

"Are you trying to have the whole neighborhood come rushing over?" Kat hissed, before removing her paw.

"I'm a KAT!" Coop blurted out, still in disbelief.

"Yes I can see that Coop" Kat replied.

"HOW?!" Coop asked.

"Well my machine was made to improve things and I'd say being a Kat is a step up from being a human" Kat joked.

Coop stared back at her with a less than amused look as his brain began conjuring up every swear he knew.

Seeing her mate getting ready to have an aneurysm, Kat quickly reassured Coop that his change wouldn't be permanent.

"I'll be able to change you back once the machine recharges, it shouldn't take more than a few hours"

"Well what do you suggest we do until then. Both Millie and my dad are in the house and there's no way I'm letting Millie see me" Coop said, shuddering at the thought of sitting through one of his sister's tea parties.

"Well we could just stay in the shed and wait it out" Kat recommended.

Coop wanted to argue with the feline but he knew that that was their best bet of not being seen.

"Finnneee, let's go" he groaned.

The pair walked back to the shed, Coop still reeling from his initial disbelief as they went inside of the small wooden building.

Coop went in first, hopping up onto a shelf to properly examine himself, looking over his body with scrutinizing detail as Kat came in and closed the door behind them.

Kat couldn't help but feel a little guilty as she saw concern on Coop's face.

Joining Coop on top of the shelf she cupped his chin to make him face her.

"I already told you it wouldn't be permanent so stop all the gawking. Your worry is making me worry" Kat said.

"Yeah yeah I know, it's just… there's a lot to take in. I can smell things I never have before, see things in a way I never could before, and a whole lot of other stuff that for you is just 2nd nature" Coop said.

Kat couldn't help but grin at the inadvertent praise he "yeah we are pretty cool as a species aren't we Coop?"

Coop leanded into Kat gently nuzzling the underside of her neck.

"Uuhh Coop?" Kat said.

Kat eyed the human turned Catnipian, confused as to why his mood had done a complete 180

"Kat did you always smell this.. good" Coop said leaning into her to the point where she fell over.

Pinning Kat, Coop continued assuage his carnal desire for Kat. Nipping at her neck, his new set of teeth coaxing a series of mewls from Kat as her heart raced with excitement and nervousness. Never seeing Coop in such a possessive state.

"Hehe um, Coop" Kat said nervously.

Kat was greeted with less of a response and more of a demand as Coop backed off her and told her to roll over.

Hovering a paw over where Coop had just left numerous bite marks Kat just stared at her, now snow white, mate with a deep blush. One that got even deeper when she saw that not every part of him was wholly Catnipian.

"I- I- in here? Are you sure?" Kat said, her rationale was thinking about what'd happen if someone came in while they went at it but her body had already followed her lover's commands. Rolling over, even hiking her tail in anticipation.

Kat let out a huff as she felt the brunt of Coops weight over top of her as he breathed down her neck. He wasted no time in mounting her, thrusting at her hips trying to align his cock with her slit.

"aaAaAaa, C-Coop~" Kat moaned

She had never been with another Catnipian so feeling a set of paws wrap around her haunches filled her most instinctual niche, one that being bred by someone other than her own species left vacant, and the fact that it was still Coop had her melting under his grasp.

She blushed when Coop had begun humping her, his thrust missed their mark, his cockhead bumping against her inner thigh several times before..

"FFFFUUCKYEESS" Kat blurted out, much louder than she anticipated as Coop's frantic humping finally hit home the small feline getting the brunt of Coop's manhood all in one thrust. Her eyes rolled back as she relished in the feeling of having every inch of her filled in the way only Coop could, clawing into the wooden shelf as Coop dug into her haunches preparing to ream into her like a feral animal.

Kat couldn't even tell if Coop was fully aware of how rough he was taking her and she loved it.

"Mmf~! Yes! Deeper honey!" She moaned

Kat couldn't contain herself, a wide drunken grin growing on her face. All the times she had been with Coop before she had at least some semblance of control over the situation. But here, with Coop towering over her, being properly mated, she felt helpless in the best possible way. The frantic pace he started with riddled her with pleasure leaving no time to recuperate.

Each thrust forward was accompanied by Kat throwing herself back to meet Coop halfway. The resulting cacophony of lewd sounds bleeding through the shed walls.

"Ah~! Mf~! Ooh~!" Kat moaned, each thrust sent Coop's massive cock tunneling into her bumping directly against her womb.

Coop, being overstimulated by his new senses perched himself forward, resting his head on top of Kat's, also getting even deeper inside of her. Inadvertently with that she could feel his heart race on her back and hear every huff of his breath as he draped himself over her. Each a reminder of who was claiming her womb at the moment.

And it was rapidly becoming too much for Kat as she felt her body tighten with an orgasm.

"aaaAaAA~! Do it! Fill me up" Kat yelled as she started to cum. Her love canal clenched down as tight as it could, instinctively trying to hold Coop in place point blank to her cervix. The feeling of her soft insides finally sent Coop hurdling over the edge, his humps becoming random and sporadic as he blasted Kat's womb with thick white ropes of cum, biting down on the nape of her neck.

Kat's fading orgasm was renewed to mind numbing levels once she felt her stomach bulge with the sheer quantity of seed. Aimlessly pawing at the air as if she was trying to hold onto reality itself.

"cooooppp" she said softly, her tongue lolling out of her mouth.

She felt each throb and spurt as Coop held her down..

*Half an hour later*

"Jeez Coop, you were an animal!" Kat chuckled.

After Kat was able to think and Coop had adjusted to his acute senses, the two flopped onto the shelf more exhausted than they had ever been before, Kat playing little spoon to Coop. A small rainstorm had kicked up and with a few hours still remaining until the effects on Coop wore off the two decided to wait out the storm in the shed and enjoy each other's company.

"Heh sorry if I was kinda rough" Coop said sheepishly.

"Oh please, these thighs are nigh indestructible" Kat said.

Slinging an arm over Kat's side Coop gently began rubbing her stomach. "So what about the litter of kittens I probably just gave you?" Coop said.

"Heh, no worries, if there's anyone I would've wanted kits with it'd be you~" Kat said lovingly, nuzzling up underneath Coop's chin. "Just never tell them that they were conceived in a shed" She chuckled.

The two laughed as they held each other close, the fatigue from their spur of the moment romp was finally beginning to catch up to them and with the soft sounds of the rain outside, they couldn't think of a better time to take a nap together.

The End!

Finally shook off some of the dust on this story with this short little oneshot. Like I said last chapter these will all be unrelated oneshots. Just some short one chapter Coop x Kat fluff because I love the ship :3

Thanks for reading!