Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8470456.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Supernatural
  Relationship:
      Castiel/Dean_Winchester
  Character:
      Dean_Winchester, Castiel
  Additional Tags:
      Catboy_Castiel, Cat/Human_Hybrids, Mating_Cycles/In_Heat, Catboys_&
      Catgirls, Interspecies_Sex, Anal_Fingering, Rimming, Anal_Sex, Self-
      Lubrication, slick, Top_Dean, Bottom_Castiel, Mpreg, Age_Difference
  Series:
      Part 2 of Purrfect_Kittenboy_Cas
  Stats:
      Published: 2016-11-04 Chapters: 1/? Words: 2512
****** Purrfect Heat ******
by justlittleoldunkillableme_(AmbecaWatson)
Summary
     Catboy Cas and his mate Dean have been together for a while when Cas'
     first heat hits and they need each other more than ever.
Notes
     After eons, I'm putting out a sequel to 'Purrfect Boy'. I've edited
     the lisping on the original fic a little if you wanna see the
     differences for yourself and it's not as heavily featured here as
     some of y'all found it a little distracting. This fic is basically
     shameless smut about Cas' first real heat with Dean, and because I am
     incapable of pwp, there will be some excuse of plot as well. I dunno
     how long this is gonna be, definitely not novel-length or anything,
     but I think something over 10k is definitely in the cards. Enjoy the
     filth ;)
Dean was stuck at work, a whole batch of cars coming in for switching the tires
for the oncoming winter and while it didn't really take long to do that for one
car, it took more than enough with 20 and all of them coming in at the last
minute.
Dean did his work as fast as he could, but he still had three hours of overtime
when he finally clocked out and raced his car back home to get to Cas.
It was months since they had gotten together, or rather since Dean had saved
Cas and Alfie from suffering so many other kittenboys' fate of being given to
unloving homes where they were simply kept as breeding tools or for spreading
their legs at their master's will.
Dean shook his head when he thought back to his former colleague Gordon Walker
had been one of the worst abusers of the kittenboys in the immediate
surroundings. A few months ago he'd been found dead in a ditch off the main
road and while Dean had attended his funeral, he saw that no one really shed
more than a forced tear at his passing.
People like Gordon were the reason Dean had never wanted to own a kit himself.
If he was really honest with himself he still didn't own one, even with Cas
stumbling into his life because it had been Cas who initiated their
relationship and not Dean. He'd never forced Cas to do anything he didn't want
and he had been nothing but happy with his kit.
He'd even got him to stop calling him 'masster' which had been drilled into
every kit's skull was the correct title for the person who claimed them. And
since Cas now lived with Dean and not only used his voice gently and training
to coo among other kittenbreds, his lisp had gotten better as well.
What happened in their bedroom was a whole other matter though. Cas had not let
go of his lisp and giving Dean titles when they went at it because both of them
got crazy turned on because of it.
“Cas?” Dean called when he got home, the house dark and completely uninviting
for once, reminding Dean of his bachelor times when there hadn't been freshly
baked pie on the kitchen counter and a roast in the oven when he came home. The
absence of Cas worried him as he walked through the house and finally opened
the bedroom door.
“Cas,” he whispered, seeing the kittenboy asleep and curled up under their
comforter, his ears twitching to attention and his eyes opening sleepily when
he saw Dean.
“Hello Dean,” he smiled and opened his arms, Dean sinking into them, not
minding that he hadn't even taken off his shoes and probably smelled like
rubber and engine grease.
“Hey sweetheart,” he hummed, loving the familiar warmth of his kitten that he
felt more intensely than ever right now.
He carded through Cas' silky dark hair, tugging slightly on his feline ears the
way he'd learned Cas loved and bent his neck up to give his kit a kiss.
“Are you alright?” he asked when he touched Cas' craned neck, much warmer than
this morning.
“I'm fine,” Cas frowned, his tail twitching and his mouth raised expectantly as
if he wasn't getting why he hadn't been kissed yet.
“You don't seem fine,” Dean placed his palm on his kittenboy's forehead. “Cas,
you're burning up. Are you sick?”
“No?” Cas pouted, his tail twitching again.
“Then why were you in bed? Did you sleep all day?”
“Not all day,” Cas shook his head. “I took a nap this afternoon because I felt
really tired and I put an alarm on to make dinner for uss at 5pm.”
“Babe, it's gone 8. You slept the whole day away.”
“That's sstrange,” Cas blinked, his lisp coming back as he puzzled over why he
was so out of it.
“You sure you're ok? How are you feeling?”
“I'm a bit hungry, and more than a bit horny,” Cas admitted with a smile, but
something about the word horny made Dean's brain go 'ping'.
“Are you going into heat, baby?”
“I... might?” Cas said haltingly, not sure himself.
“I think you are,” Dean put the back of his hand onto Cas' forehead again and
in the next second had his hand in his phone, taking the week off.
“You don't need to do that. I'm fine,” Cas shoved Dean's hand off. “I know you
can't wait to leave this place either, and if you don't get paid...”
“It's okay, sweetheart. I still have paid holidays to take and Bobby has been
pestering me to take them before he gets in trouble with the human resources.”
“He's a good boss,” Cas purred, putting Dean's hand back on him, but in a more
more indecent place than his forehead. “But it's really not necessary for you
to do this. I'm fine.”
“Say that again when we've been at the stores.”
“What are we gonna buy?” Cas' ears moved up. He loved going shopping almost as
much as Dean loathed it.
“Food. And a stack of heat supplies. Or flu meds. I haven't decided yet.”
 
It was telling that the closest grocery store was next to a kitten heat supply
store, otherwhile also known a sex shop. Dean loaded different flavours of
lube, toys and ointment into the boot of his car along with loads of vegetables
and carb containing foods while Cas's tail twirled itself around his trouser
leg while he stammeringly insisted that all that wasn't necessary and that he
was really fine.
“Better not take any chances, baby. If this really isn't your heat coming on,
it's still bound to come any day now if your calculations were correct.”
“I know. Dean, I'm sslightly sscared.”
“Of what, sweetheart?” Dean pulled Cas close to press a kiss to his nose, his
kitten purring low in his throat at that.
“Of this heat. It's always bad, but this time it might be worse because I'm
hornier than ever with you. And because I may fall pregnant during it.”
“I thought you wanted to get pregnant?” Dean blinked, hurt and confusion drawn
on his brow.
“I sstill do. But...”
“You wanna get past your first heat with me first?”
“Yeah,” Cas nodded, rubbing his head on Dean's chest gratefully for
understanding him.
“No worries, baby. We're getting you birth control pills for your heat.”
“But... they'll sstare,” Cas lisped, flushing deep red. Buying medicine not to
fall pregnant during a heat was very frowned upon around here.
“I don't give a shit,” Dean rumbled. “All I care about is taking care of you
and doing what's best for you.”
“I don't wanna do in,” Cas' gaze was turned towards the pharmacy, his blush not
having left his cheeks yet.
“I would say stay by the car, but there's too many asshats around. And you're
just too delectable.”
“You're just sayin' that,” Cas' tail twitched because Dean was embarrassing
him.
“It's true,” Dean said, loving how Cas squirmed at being told that he was a
looker.
“You're so mean to me,” Cas blushed again, fake this time.
“Oh baby, let's get you your pills and I'll show you how mean I can be to you.”
“Promise?” Cas smirked, his sharp teeth flashing as he curled around Dean and
they walked into the dreaded pharmacy, but at least they faced the disdain of
the people inside together.
 
“Well, that went as expected,” Dean pulled out a box of tissues he'd bought
earlier and wiped spit off his face and out of Cas' hair, stowing the birth
control pills safely in one of the bags, his knuckled starting to bruise after
not too gentle contact with Kubrick's jaw who unfortunately had been in the
pharmacy at the same time as them and who had some words to say about Dean
sneaking his kit away and then not being man enough to get it fat with a
litter.
“Does it hurt mucch?” Cas' lisp was back with full force as they climbed into
the car and drove off.
“Not really. Gonna have to put some ice on it and it'll be alright,” Dean drove
on through the darkness, with Cas wiggling next to him.
“Babe,” he said exasperatedly after 5 minutes of Cas never stopping to wiggle
and rub himself on the seat.
“Dean,” Cas moaned and Dean took his eyes off the road for a second to look at
Cas.
His kitten was still flushed, his hair up on all ends, his eyes flashing as
Dean stared into them.
“I was right then,” Dean grinned reassuringly. “You're going into heat, aren't
you?”
“Fuck, Dean. There's a goddamn puddle of slick on the seat already.”
“You wouldn't dare,” Dean growled, putting the pedal to the metal to get them
home and Cas off the leather seat and into their bed.
“Not as if I can help it,” Cas purred, popping the button of his jeans and
sticking his hand into it unashamed, groaning as Dean ventured a look again
when Cas crooked his fingers.
“Jesus, are you fingering yourself?” Dean moaned, his cock filling as he pulled
up in the driveway.
“Yess,” Cas moaned triumphantly.
“Can you wait while I take the groceries in or do you need me right now?”
“I always need you,” Cas panted at him, his arm moving obscenely back and forth
in his pants, making Dean's pants strain very uncomfortably. “But yeah, you can
still take care of stuff. I'm not that desperate yet.”
“I'm not so sure about myself though,” Dean groaned as he picked up all the
bags and just dumped them inside the front door quickly, Cas needing longer to
get out of the car, holding onto the door with a slick hand, nearly toppling
over as he moaned hungrily at Dean bending down and embracing him.
“God,” Cas moaned as he clutched to Dean and rubbed himself on him desperately.
“Just call me Dean,” he chuckled as he picked Cas up bridal style and carried
him into the house.
“The pills,” Cas panted, sticking his fingers back into himself in direct line
of Dean's sight.
“I got 'em,” Dean panted, bringing Cas into the bedroom and then practically
flying back to the grocery bags to the ever more desperate growing pants of:
“Dean... god... I need you... please,” coming from Cas.
“I'm here, babe. I'm here,” he ran back with a water bottle and fumbling the
first pill out of the sachet.
“Swallow,” he put the pill onto Cas' tongue and his overheating kittenboy
guzzled it down with water, panting as he finished because he was holding his
breath for too long: “Please Dean. I need you to fuck me. Fuck this outta me.”
“You got it, sweetheart,” Dean sighed with relief at finally shedding his pants
and freeing his aching erection from its confinement.
“Deeaahhn!” Cas moaned, lifting his hips and getting up on all fours,
presenting his red rimmed, glistening hole to Dean's view.
“Oh baby,” Dean moaned, jerking his cock in his fist and couldn't help but lick
a stripe up Cas' balls, tasting the sweet slick of his kit, Cas' taut balls
moving up and down as his hole twitched out more slick.
Cas moaned shamelessly, his tail curling around Dean's naked thigh to hold on:
“Please, Dean... god, I need you to fuck me so badly.”
“I gotta taste you first, baby,” Dean moaned, sticking his hole into Cas' needy
hole, sucking and licking it all the way open although Cas had worked himself
pretty well already and his hole was puffy and ready through the heat hormones
coursing through his body.
“I'm ready, Dean. All wide open for you. Don't tease me now,” Cas moaned.
Dean sucked at Cas' rim one last time before getting into position behind him
and angling the tip of his cock at Cas' ass, taking up slick and rubbing
himself in Cas' crack to get lubed up before dipping in and sinking inside his
kit slowly. The ripples in Cas' channel massaged his cock so perfectly that
Dean was close to coming when he'd bottomed out, but he bit into his fist to
stop himself, flinching at the pain when he noticed that he'd bitten the
already injured one. The shock was enough to stop the building orgasm and Dean
was happy about it. Cas needed to be nailed, not have a quick shooter that
didn't give him enough satisfaction to last until the next heat flare.
Dean dragged his cock back out of a moaning and cursingly lisping Cas
underneath him who held onto him so tightly with his channel that he thought he
could never pull out again, but Cas eventually stopped clenching so Dean could
fuck back into him with a mighty heave.
“Yesss, god, fuck,” Cas babbled, his cock in his fist, his cheeks spread far as
he shoved himself back onto Dean's cock, his tail holding Dean close and his
back breaking out in sweat as he set the pace, his ass slapping against Dean's
hips as he got frantic.
Dean held on, trying not to look at himself disappearing inside his kitten,
pressing his aching fist to distract himself from the prefect drag, and how Cas
shook whenever Dean's cock touched his prostate or his cervix, the kitten horny
and desperate underneath him, taking what he needed and Dean desperately trying
to keep himself from coming.
“Screw this,” he growled when he saw Cas looking back at him with a perfectly
fucked expression and he couldn't hold back anymore, pressing Cas into the
mattress with his hands on his lower back and just pounding his orgasm into the
perfect heat of his kitten surrounding him.
“Dean, yes! That's fucking perfect... like that! Oh my fucking god!” Cas
screamed as he rutted out his own orgasm while his cock rubbed hard against the
sheets from Dean's leverage.
Dean panted as he kissed Cas' back, the whole kittenboy vibrating from how
deeply he was purring and thanking him for this.
“How long do your heats normally last, baby?”
“Three days,” Cas hummed over his purring. “But this feels better and also
worse than ever. I think it's gonna be a week at least. I'm already getting
horny again and it's all because of you.”
“Are you hurting?” Dean climbed off Cas and pulled him close, stroking his
satiny hair as Cas lazily threw one leg over him, oozing come and slick onto
Dean's leg. “I know some kits hurt during heat.”
“When they have to go through it alone, or aren't with the right partner, sure.
My hole hurt and burned like hell when I went through this alone. And if you're
claimed by an asshole who roughs you up during heat time, you chafe. But when
you're with your true mate, heat is just as perfect as right now,” Cas purred
and rested his head on Dean's chest, both of them resting until the heat rose
again.
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