The work was finished as quickly as he could manage.
He found it hard to concentrate when all he could think about was how fucking cool it would be to be a leopard. Dean hadn't had hardly enough time to explore his powers so far, and he was excited as hell.
Especially after what happened earlier with Cas and Charlie. He wanted-no, needed, to figure out what had gone on while he was busy being a dumbass.
Dean gave a sigh and finally heaved his now empty feed bucket into the storage closet, washing his hands before he hurried to go. He walked fast, barely even noticing how soft the lights glowed, shadows flickering on the ground. The sun had already gone down a few hours ago, leaving him and Cas in semi-darkness.
He shut the door to the leopard exhibit behind him, smiling just a little. A very manly, not at all love-sick or dopey smile, he would assure you.
Nails click-clacking across the floor alerted him to Castiel's presence. He turned, eyes widening as he saw those beautiful, hypnotic spots.
You should shift, too, Castiel purred, I've been waiting long enough for you to join me .
Yeah, well, some of us have actual work to do. Dean said, shaking his head. He felt a blush rising to his cheeks, but refused to show it.
You're right. Hunting for prey and staving off my own heat isn't straining or stressful at all. What ever was I thinking, not taking you into mind?Castiel asked. Dean could tell that he was mentally rolling his eyes.
Hey, I helped with the heat part yesterday. He defended.
Yes, Castiel relented. And I'm hoping you'll help again soon enough.
There was a promise in that, an underlying tension that set Dean's cock throbbing. He whipped off his shirt and set it on the floor, not wanting to shred it or lose it when he shifted. The uniforms they wore were fucking expensive, after all.
Once his skin was entirely exposed, goosebumps rising from the chill of the room, Dean closed his eyes and focused. Castiel crept forward and rubbed his lithe body along Dean's legs, causing a shiver to rip itself up his spine. His shoulders rolled as he imagined himself as fierce, graceful, predatory.
Dean opened his eyes and to see directly into Castiel's. That electric blue, soft and yet firm so that it reminded him of the way lightning seemed to be gentle with the sky. He growled softly, and Castiel stalked forward. He rubbed against Dean, leaving his scent all over his shoulders. Something ancient and primal stirred in Dean, deep in his stomach.
Being like this, with Cas? His body felt clumsy and his paws felt scratched against the concrete, but he couldn't deny that there was something natural about it. Like he'd been an amphibian all his life (kudos to Jo for making sure he knew that word) and was just slipping into water for the first time.
He took a few steps, and found them just as awkward as before. Castiel placed his head on Dean's hips, using the strength he had to push them down a few inches. Dean felt confusion and vague annoyance for a moment before he realized what Castiel was trying to do.
Oh.
Dean stalked forward, keeping his back hips lower. There, that was much better.

Suddenly, the slightly swaying cat toy looked really, intensely intersesting. Forgetting for a moment that he was alone, he stalked forward and playfully batted at one of the dangling pieces of cloth on the cat tree,.

Castiel's amusement met him, and he felt his entire face go red. Or at least, it would have gone red if he wasn't a fucking cat right now.

He turned and talked to the other side of the room, sitting down with his back facing Castiel. Cas gave a small, back-of-the-throat sound that could very well be a chuckle before he walked over to Dean, rubbing affectionately along his shoulders. Dean tried not to let his pleasure leak through the connection, but he ultimately failed.

Castiel's fur against his own just felt so right . He loved the smooth, gliding sensation. He loved the way his muscles twitched in anticipation. He loved it all, so much that it scared him a little.

He turned back to Cas, standing up on all fours. He was careful to keep his back hips lower this time, fighting the urge to stand on his tipy-toes. The whole height thing was gonna require a little bit of adjustment on his part.

Follow me . Castiel said. Dean briefly considered snapping back something along the lines of 'you're not my boss', but he decided it wasn't worth it.

Castiel moved towards the open door of the enclosure, looking back at Dean to ensure he was following. Dean was almost paying enough attention to be annoyed, but he was too distracted by the vivid green of the plants. He knew they got watered a lot, but this was ridiculous. It was like he'd never seen anything so green before.

And the smell . The scent of the miniature waterfall made the entire enclosure smell crisp and clean and right. The smell of fresh-cut grass and flowers in full bloom and mud and Castiel were all over the place in this little cage, and Dean liked it all more than he was expecting to.

Okay, so now he didn't feel so bad over Castiel having to stay here for a little while. As much as he still wished he could get him free sooner, Dean had to admit that this was a pretty cool setup.

What do you think? Castiel questioned. Dean turned towards where Castiel had been standing to find that the space was empty. He felt only a quick moment of confusion before something grazed his other side, causing him to jump in surprise. He turned and looked into Cas's mischevious eyes.

It's not bad. He teased, whiskers twitching. His ears moved forward to hear better, straining to detect bird calls over the sound of the water. Not much privacy, but it's pretty cool.

Castiel seemed pleased by that answer, and walked forward without a glance back. It was clear that he had intended for Dean to follow him, and Dean decided to fall into step.

Temptation was soon to arise. Castiel's tail flicked back and forth, back and forth, almost hypnotically. Dean felt an urge older than mankind itself rise up within him, the urge to be the predator to Cas's prey, to lunge forward and knock both of them to the ground, send them sprawling in a heated-

Castiel turned sharply, eyes narrowed. His pupils dialated, and Dean felt the same playful urge returned over the bond.

Note to self, he teased, When I'm planning a sneak attack, remember that you can literally read my goddamned mind .

Castiel seemed to smirk, if such a thing were possible. He dropped into a crouch, hips high in the air and wiggling with anticipation. Dean raised an eyebrow. I can't tell if you're trying to seduce me or attack me .

Castiel sprang, legs taking him high in the air as he sailed towards Dean. Dean tried to move, but it was too late to do anything other than flinch as Castiel crashed into him, knocking him over onto his side. Cas's paws were soon pushing at his, Cas's teeth pressed against his neck, and Dean's heart was doing summersaults in his chest.

Hopefully, a little bit of both . He purred, letting go of Dean's neck and licking it several times, to ensure his mate was okay. Dean sat, still stunned, letting his body relax as Castiel backed up.

Dean was more prepared the next time.

When Castiel jumped, his own paws were ready. He reared up, taking several carefully-balanced steps backwards (In which his exact thoughts wereAaaaah fuck shit I'm gonna fall and Cas is gonna laugh his spotted ass off at me oh WAIT no I got this we're good ) and keeping his eyes on Castiel. Castiel landed in front of him and Dean let himself fall forward, ending with Castiel's head underneathe his stomach, and Dean's paws wrapped around Cas's waist.

Castiel started to pull back, but thought better of it. Dean had just enough time to feel confused before he felt a hot, warm tongue towards the back of his stomach, and he felt himself begin to harden.

Castiel used his distraction to rear back and shake Dean off, coming down with one paw pressing against Dean's shoulder. Dean felt his body betray him and lose balance, and Castiel stood victoriously over him. He licked Dean's shoulder several times, seemingly for consolation.

I'd make a shit leopard . Dean said, only half-teasing. Castiel did that odd chuckle thing, his eyes gleaming with affection.

You'd make a fine wildcat. You have the basics down. He countered.

Dean lay there for a few moments, until Cas's small licks got lower and lower. His penis stirred in its sheath, and he gave a small growl of approval.

Apparently, his genetalia still looked the same, with the exception of the sheath and a patch of spots alongside the bottom. It felt odd to have something wrapped around you all the time, but not in a bad way. More in a tight-fitting-underwear type way.

Cas's eyes looked hungry, and Dean scented the air to see if he was in a similar situation. The smell of Cas's musky arounsal filled the air, and Dean felt himself settling down from his playful mood and into something a little more heavy.

Castiel stopped, turning. Dean's cock gave a small throb in protest, but he waited it out. Castiel's eyes scanned the environment, and Dean gave a shudder as they returned to his body. Cas's tongue darted out to lick over his lips.

He turned and slunk off towards the water, and Dean got up to follow. Castiel stopped and shot a lusty gaze over his shoulder, piercing blue eyes connecting and holding him captive. He moved forward and Castiel turned, feet stepping easily across stones and through the waterfall.

Dean followed, lust thrumming through him. His cock briefly softened at the cold thrum of the water, but it didn't deter him for long. Castiel sat huddled in a dark corner, back in human form. His eyes came to glance at Dean's, and Dean conveyed his confusion through the link.

"I have to stretch myself like this." Castiel said, lifting a leg. Dean watched in fascination as he inserted two fingers in, hissing and hips bucking at the feeling. Castiel clearly loved being filled up, and Dean loved watching his long, thin fingers disappear again and again into his hole. Cas scissored his fingers apart and gave a soft hiss, wiggling his hips down.

You're so beautiful for me, Dean said. He padded up, laying down on the ground in front of Castiel's thigh. He leaned forward and Castiel's breath quickened as his tongue rolled gently over his cock, just once.

"Fuck." Castiel spat, witchdrawing his fingers. He pushed Dean away, rolling his hips and letting the change flow through him. In between blinks, he was a cat again, turning around and presenting his almost-dripping hole to Dean.

Dean hesitated. He didn't know if he'd be used to having sex like this, in an animal form. What if he wasn't enough to satisfy Cas? What if he didn't-

Castiel glanced back impatiently, wiggling his hips in a way that could only be described as sinful. Dean felt his mouth go dry and he forced his fears out of his mind, stepping forward to sniff at Cas. Castiel gave an impatient growl, and Dean could see his hard cock bobbing against his stomach.

Castiel waited patiently. Or at least, what he considered patiently. He was silently urging Dean to move forward the entire time, staying presented as his cock throbbed against his stomach.

Finally, he felt warm pressure on either side of him. He lowered his hips a little, to get the right angle. Dean let out a small growl as he positioned himself, and Castiel used all of his willpower to stay still while Dean figured out how he wanted it.

Slowly, the head breached his hole.

He'd stretched himself. Castiel always stretched himself, and Dean still felt so fucking big every time. He loved it. There was a sweet, subtle burn that came with his muscles giving way as Dean pushed in, fucked into him slowly. He couldn't keep himself from pushing back a few inches, and Dean bottomed out inside of him.

Cas gave a soft nudge upwards, to let Dean know that he was alright. He felt Dean's pure want, lust, love, devotion, pouring through to him from the link. He gave a growl and thrust forward and back, forcing Dean to move.

Gods, that turned him on. Dean got with the picture after that, giving a few slow thrusts. Castiel's nails scraped across the ground as Dean brushed up against his prostate for the first time, sending a sharp pleasure aching through his hips.

It seemed to radiate down to his bones. Dean, thrusting, powerful muscles moving over him. Castiel could never get enough of this feeling of being full, being cherished, Dean working his hardest to please him.

The streetlights just barely shone into the cave, and Castiel had good night vision. He looked up towards Dean's pelt, barely illuminated in that beautiful glow, and he could hardly help himself but to bask in the glorious gift the goddess had given him in having Dean as his True Mate.

Dean thrust again, his movements becoming stronger, firmer. Castiel shuddered as he was forced open again and again, the speed starting to increase. Dean's concentration, how devoted he was to making Castiel feel good, had Cas purring deep and heavy in no time.

Dean felt like he was getting the hand of it. It wasn't so hard after awhile. He just had to keep his head clear, to keep focussing on moving his body.

Cas was warm and hot and so fucking tight , it was setting Dean's entire body on fire. Everything felt warm and soft and wet and absolutely fucking amazing. Castiel was enthusiastically meeting his thrusts, and the low timbre of his purrs let Dean know he was enjoying himself.

There was something more intimate about making love like this. On a purely animalistic level, Dean was having sex with Castiel. However, that seemed to be in the back of his mind. His main priorities, his feelings and thoughts and the connection flowing between them absolutely melting into pleasure was far more intimate than normal sex could ever be.

Castiel, stripped of human identity. Dean loved him for nothing more than just his soul, who he was inside, the way he made Dean feel. When Dean was a cat, he wasn't a zookeeper or an older brother. He was a mate, protector, and lover, and Castiel loved him for that.

He increased his pace, his hips now trembling. The pleasure and the pressure and the heat was building and building, and Dean had to take a deep, steady breath to make sure that he was gonna last long enough to make Cas cum.

Cas wasn't helping that situation. He kept thrusting back, purring, flexing around Dean. Dean moved faster and faster, both for Cas's clear insistance and his own desire.

Castiel was feeling full now. So, so full. His stomach was warm and tight, and precum dripped from the tip of his cock. He felt ready to explode at any moment.

Dean moved faster. His thrusts became more precise, more punctuated. Castiel breathed deeply, trying to hold out, trying to make this last just a little while longer, striving to make this lovely pleasure last as much as it possibly could. Dean was hitting his prostate almost every time, and it was enough pleasure to make Castiel almost dizzy.

Finally, he couldn't take it anymore. His toes curled as he came, long and hard. He let out a long growl as his muscles shook and trembled, pleasure erasing all other thoughts.

Suddenly, there was a tingling. Soft, subtle, but still tangible. Castiel knew what it was because he'd felt it before, when he was praying or doing devotional, or leaving offerings. It was R'Sam's acceptance, R'Sam's love.

This was her permission.

Dean followed soon after, burying his seed deep inside Castiel. He buried his face in Cas's shoulders as his knot swelled, and Castiel didn't seem to mind.

Do you want to shift back for this? I'd like to lay down while we wait for you to- Castiel cut off as Dean's knot rubbed against his prostate, causing another orgasm to barrel out of him. He panted hard, and Dean gave a chuckle.

They shifted together. They lay together. It was like they were one, intimate body. Dean lay his hand on Castiel's hip, pulling him closer. His lips closed over Castiel's shoulder, placing large and sloppy kisses all over Castiel's skin, wherever he could reach. All the time his hips continued to grind, taking himself as well as Castiel through several more orgasms.

Dean thought that this was bittersweet. Castiel would be through his first heat tomorrow. Dean needed to find a way to get him out of there, no matter how much he wanted to keep him all to himself. Castiel wanted to be in the wild, with his family.

Dean forced the thought away. He and Cas were too close for his emotions not to leak through right now, and he didn't want Cas to feel bad about going back, not even for a second. Dean would prefer him happy to being with him any day of the week. Castiel meant more to him than just a fuck toy; and if Cas wanted to leave, well, Dean do everything in his power to make that happen.

No matter how much it would hurt him to see Cas go.

Hey! Just wanted to inform everyone that there will be a sequel to this fic when it's done. It's a few months away from being started, and it'll be a little shorter, (around 20,000 words) but it's gonna be good ^_^