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Kleo was the first one to wake in the morning sunlight, but she didn't allow herself to stir for very long.

Rather than waking up with a cold sweat and the horrifying realization that she'd slept with her own brother, she came into consciousness with a clear picture of what she wanted out of the day.

It started with food, but nothing in the kitchen sounded appetizing. A quick rummage didn't come up with anything that sounded great other than the meat sticks in the fridge, and after just a couple of those, Kleo was left to stand over her brother, wondering when the exhausted canine might finally stir awake.

She would have been watching him obsessively if she wasn't otherwise distracted by the presence of an odd warmth between her legs.

"I get it. I still need to fuck someone," she murmured, but this particular heat was different than the one that told her she needed to be fucked. This was something more familiar of when she still called herself Krios; a throbbing pressure that could only be soothed by stroking a cock.

The realization, much like the rise of the sun, was equal parts slow and illuminating.

"So this...this is a sheath?" she wondered aloud, reaching a single digit into the small slit upon the tubular opening that jutted out from her crotch. It looked just like the one between Samuel's legs, and from just a tiny bit of probing, she was able to coax the tip of member out of hiding. "That's strange. Sure doesn't look like the dick I woke up with yesterday."

Kleo never actually saw her brother's erection before he put it inside of her, making the experience a crash course as she watched the inches begin to emerge from seemingly nowhere, as if her flesh was magically imbued. Marbled reddish-pink flesh began pulsing at the air and leaking precum as Kleo decided which urge she was going to satisfy first.

She was grinning over her brother's unconscious form as she knelt over it, watching his sprawled, naked chest rise and fall slowly with his peaceful sleep.

It'd be one hell of a wakeup call.

"Waaaaake up, big brother..." her voice was soft and sweet, like the song of a bird outside one's window in the morning. "You're gonna wanna remember this!"

His ears twitched as Kleo's voice passed over them with all the tenderness of velvet and honey, her words carrying just enough weight to stir him from his sleep. Her breasts were hanging enticingly over his chest and the warmth of her sex radiated with lustful strength, but Samuel wasn't awake enough to appreciate the sight of something thick and red between his thighs.

"Don't think I could forget it," his voice was still groggy as he offered a tired smile in reply. His paws were quick to shake off the rust and reach up, gripping her breasts in a playful morning greeting, but his delicate touch became painfully tight as something slick and heated poked at the cheeks of his rump. "Uhm...Kleo? W...what the hell is that?"

"Turns out I got the best of both worlds!" she replied cheerfully, her face the picture of happiness as she gave another gentle buck of her hips. The tip of her cock was drooling eagerly at Samuel's pucker before he had a chance to adequately prepare for it, and Kleo was already gripping just behind his rump to push his hips and torso back, wanting to keep him pinned. "Only seems fair that I get a turn to be on top; wouldn't you agree?"

Trapped under her weight and too groggy to protest, Samuel winced at the feel of added pressure, but sucked in a gasp all the same as his body quickly adjusted to the feeling of something warm and slick easing at his asshole. "But...you can't really breed me like this, Kleo."

"Who cares about breeding? I'm just humping you for fun!" Kleo admitted, openly vocalizing the wonton, canine nature of the act. "I wanna see if this still works!"

The first inch was already wiggling in thanks to the tapered shape of her cock, and previous experience as a human kept Kleo from injuring her brother as she continued guiding the rest of her slowly widening length inside of Samuel's tailhole.

As Samantha, she'd allowed only a few very select men to explore her rear entrance.

As Samuel, broken logic told him that Kleo was someone she could trust the special experience with.

"Sure f-feels like it does," Samuel replied through gritted fangs, doing his best to stay relaxed in his compromised position. "Unless that's not what you meant?"

"I know I said it was for fun," Kleo repeated, "But I'm still planning on cumming inside ya, big brother."

Samuel gulped, but the pressure released a little as a gave his sister's tits another squeeze. "And what about me, Kleo?"

She couldn't help a wince as her brother so skillfully manipulated her, working at full, swollen breasts with a touch that was every bit as desired as it was necessary. "If you're lucky, you can always sneak out another," she claimed, "But...I guess I could h-help you out."

Already, Kleo was having trouble with her words, but ever the kind soul, she reached an arm around the inside of her brother's thigh, keeping her shoulders pressed into his legs to keep him pinned back as her digits came to rest on the base of his sack. It was firm, his orbs pressed tight to the tender flesh, and even the slightest touch upon it was enough to coax the first couple inches of his familiar cock from within the depths of his sheath.

Kleo's focus turned right to it as she gripped it in her paw and immediately began to stroke, eager to watch her brother shoot a load onto his own chest.

She wouldn't have to wait long for it.

" Kleo! O...oh fuck...Who knew that could feel s-so good?!" Samuel threw his head back and rubbed his cheek into the carpet as Kleo continued pumping her wrist in wonderful timing with her hips, stroking her paw down to the base of his shaft when her own was buried all the way inside of his tailhole. "So sensitive it a-almost hurts..."

Kleo grinned. "You want me to stop?"

"Don't you dare ," Samuel growled from the back of his throat as his thighs began to quiver on either side of his sister's hips. Though he was the one pinned, he trapped her into the moment as well, clutching at her lower back and pressing his ankles to her spine as she continued to pound away at him. "Don't w-waste it...keep it in, please!"

As her brother acquiesced to the full, tasty length of her cock, Kleo was finally able to thrust into her brother with all of the quick, choppy speed of a proper canine, but she'd already come desperately close to her climax, making her knees weak as she continued on. She was struggling not to slump over his chest as she worked, but she accepted her fate as the one arm supporting her gave out.

Collapsing over his chest but still thrusting with everything she had left, Kleo felt the delicious warmth of her brother's cum spraying against the underside of her tits before it spilled down the rows of her nipples and soaked into his fur.

She would have been upset that she didn't get to see it, if she wasn't so busy enjoying the _heavenly_feeling of it.

"One cream-filled pup, c-coming...coming right up!" she tripped over her words as she barked right into his sensitive ear, making it impossible for him to escape the gravity of her orgasm. His tailhole was just a bit too tight to allow his knot to squeeze inside, but Samuel pushed back against it all the same, able to feel the impressive bulb spreading his abused flesh to the limits of what it could take.

As cum poured deep into his ass, the gape of his pucker allowed the excess to violently squirt across the floor, making a terrible mess of both canines as they shuddered and embraced in the middle of the living room.

The rays of the sun were just passing over their tired bodies as their twin lengths began retreating into the warm comfort of their sheaths.

"That's gonna be l-leaking for a while," Samuel said, able to feel the warm mess slowly trickling over the cheeks of his rump.

"Welcome to the club," Kleo teased, knowing that she'd been dripping cum through the whole of her sleep.

Her mess was spilled for fun, of course. His was spilled with purpose, and already, that purpose was starting to grow inside of her.