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Realis was only thinking of how nice it would be to have company while her partner was out of town, when she invited her brother to come and spend the weekend with her.

She hadn't given any thought to how she normally spent her time, and how changing any part of her routine might end up causing problems.

"So much easier to tuck this damn thing into the corners when my baby is around," she groaned, struggling to ease the fitted sheet into place on the corner of the mattress. She wouldn't have normally allowed something so trivial to rile her frustrations, but she was dealing with the throes of estrus...and as fate would have it, she'd misplaced her suppressant pills. "I swear, I'm just gonna leave the stupid bed unmade. Not like Rashidi will even notice..."

On summer break, Rashidi had a lot of time on his paws, and knowing how much his sister appreciated the company, he was more than happy to spend a weekend with her. After catching up over dinner the night before, he'd plucked a few strings on the banjo on the back porch, just enjoying the cool air of the evening.

In the morning, the sun was rising fast, and the warmth was so stuffy that he woke up without a single cover on his naked body. Something even warmer was spinning around in the air, carried by the blades of the ceiling fan, and like the soothing, rousing scent of a pot of coffee in the morning, it was tickling his nostrils and stirring him awake.

What awoke was a body driven by instinct: one that didn't make time for grabbing clothes, or stopping to knock on the door when he came to stand at the source of the scent.

Realis was still bent over the footboard of the bed with a frustrated groan, her tail lifted for a greater sense of balance. The lioness knew her brother to be a heavy sleeper, and hadn't considered the need for clothes so early in the morning; coupled with an open door to reveal the sight to her barely conscious sibling, she was the author of her own fate, as twisted as it would be.

"Just...g-get...under the d-damn mattress!"

Her claws stuck on the edge of the covers as she wiggled from side to side. Her hips swayed and her rump bounced as she worked, all putting on an unintentional show for a man that had already been poisoned by the pheromones of her heat.

He wasn't even awake enough to consider familial lines when his already prominent morning erection began to throb, pointing like an arrow at the warm, tender source of his early wake up call.

"Oh, h-hey! Thanks for the assist, Rashidi," Realis looked back over her shoulder as she noticed her brother's paw on the sheet next to hers, but that aura of silly sleepiness wore off as she felt his uncovered member pressing against her pouted folds, reminding her of their lack of clothes...and lack of space. "Wait a tick...the fuck are you doing in my bedroom without pants on, dude?"

Her legs immediately trembled as she felt his tip drooling against her petals, but there was still a moment of resistance as she tried to cling to logic: she'd lost her heat suppressant, and her brother was being enticed by it before he could realize what he was doing wrong. Knowing that, she didn't begrudge him for pinning her against the footboard...but she was struggling to break free of his grasp, and worse still, struggling to convince herself to say no to his advances.

"Damn it, Rashidi, y-you...you don't know what you're doing!" she tried to argue with him, but she was already panting as his hips moved forth blindly, easing the tip of his cock right past the tender flesh of her entrance. "You need to stop...b-before I make you keep going!"

Claws that wrestled their way out of the covers gripped the headboard as Rashidi's dominant nature took over, spurred on by such a powerful, heated scent that it invaded every corner of his mind. It didn't matter who was supplying the scent any longer, even as he started to come into proper consciousness.

His cock was actually throbbing, despite where it had come to rest.

"Don't...push..."

Her words were weak, and her attitude against her brother even weaker than that. Raking her claws over the footboard and finding herself thoroughly pinned, Realis couldn't stop her body from embracing the appeal of waking up this way: without her medicine to suppress the sensations, she was dominated by their influence as much as she was by her brother.

As if he knew that to be the case, he made it clear that he wouldn't be outdone, as the full length of his member pressed inside of her and sunk against her body, until she felt the unique node of every dot piercing on the underside of his shaft.

"Like I'm just gonna let you get away with that," she grunted, keeping a tight grip on the edge of the footboard. Her legs still quivered, but she did her best to stand up against her brother's invading thrusts as he became properly conscious...but even seeing her blended expression of shock and arousal, he didn't slow his pace. "If you're dumb enough to fuck me, y-you...you'd damn well better not hold back!"

Even the moment of clarity for Rashidi was tainted with their combined lust, as he decided to listen to the need in her voice, rather than her concern. "You think I ever hold back?" he asked, having properly come into his own as a sexual being in his college years. "You could have stopped me before this if you really wanted to, sis. Talk all you want, but you must have wanted me to fuck you pretty badly to just lean over and take it this way."

Cursing her heat on one breath and praising it on the next, Realis pressed her own face into the sheets, but her brother's palm on the back of her head kept it there, forcing her to remain in a submissive pose for him.

She couldn't deny how much she was enjoying herself, and swirled eyes of aquamarine couldn't escape the burnt orange stare of the lion behind her.

He's gonna make me cum, she thought. She kept her panic in the back of her mind, but her body spoke for her as inner muscles began gripping at his shaft. And I can't stop squeezing him...I just can't let him pull out! I need to feel his load!

It had been far too long since either one of the siblings had started off their day with such a pleasant experience, but they never expected to get that satisfaction from each other. They were moving on pure instinct, driven by a heat cycle that Realis couldn't contain, and Rashidi couldn't resist.

Driven by that breeding instinct, Rashidi gripped his sister by the hips and held her still as his length began throbbing wildly inside of her, providing her with the seed she so desperately lusted after...without any warning.

That was just what it took for her body to return the favor, and right against the rich, oiled wood of the bedframe, Realis eased out the first drops of her own climax...and her kindly brother proved that he could be a sweetheart, even in the most aggressive moments.

As siblings, they already shared a unique bond, but the fact that both Realis and Rashidi were hermaphroditic created even an even deeper connection between them. It wasn't a secret that they kept from each other, but this was the first time they'd been able to share in such an intimate moment; it was just an extension of instinct for Rashidi to reach around and hold the tip of Realis' member as they achieved a mutual release.

"You...d-do you even know what you've just done, Rashidi?" she asked, trying to find the words to address him properly. Her heat was so strong that he didn't even remember his own name until the last waves of bliss faded from his trembling form, but as the reality of the situation came to him, they slumped down to the floor in a quivering heap. "There's so f-fucking much in there, brother..."

The mess eased back out of her petals and dripped down her inner thighs until she was almost kneeling in the mess as they reached the floor, and the side of her bed was coated with long, dripping trails of seed from her own cock, having just become erect at the point of their climax. There was too much evidence around them to deny what they'd done, even if they weren't so close together in the afterglow.

Rashidi wasn't denying anything, but he didn't realize that he'd be making an even bigger mess of his sister before their weekend alone drew to a close.

"You know I didn't mean to," he tried to protest, even as his length dropped from her passage and hung behind her, coated in mingled creams of their own making. "I mean, I did, but I...I didn't realize-

"Don't go losing that ambitious spirit on me now," she murmured, feeling a hint more aggressive than she usually would, at the behest of her cyclic lust. "You were just starting to show me how much you'd come into your own since college, Rashidi. You're not gonna stop now, are you?"

With the heat as her aide, Realis could have gone for several more rounds without any kind of breather...at least, if she were so inclined.

With their heads a bit more level for the moment, Rashidi thought his sister might come to her better senses and realize the magnitude of what they'd done. It wasn't too late for them to drop everything, rush to the store to get a suppressant for her estrus, and a pill to counteract the first mistake that they'd made together.

It was too late, however, for him to escape from the delicate, intoxicating wisps of her scent, and their effect on him, as her backside pushed up in the air. Her face came to rest against the cool boards of the floor, and even the slight wiggle of her ass against his stomach was more than he needed to be enticed into another round.

Common sense and better judgment went out the window as her teasing words crossed his ears and tempted him into lining up the tip of his cock with her parted folds once more, still dripping with the impressive volume of his first load.

"Can't really brag about how much better I've gotten if you're still feeling needy," he claimed. He knew it was bold, even _arrogant_to suggest that his thrusts alone would cure her heat, but as long as she could reach into his mind and push the right buttons, he'd keep going until he had nothing left to give. "Since you're so insistent...you might wanna grab onto something."

"Tall talk, little brother."

Pushing one more button than necessary, Realis wasn't shocked to feel a push back against her, as her brother pumped half of his length into her body. She met him with a grin and a playful, resisting squeeze, but pressed against the floor in a compromised position, she couldn't keep him from passing right through that gesture and bottoming out inside of her once more.

The mingled cream of his first, spilled mess and the natural juices within her created for a delightfully slick start to their second round. "You're in no place to be making judgments," he told her, knowing that she'd understand the implications of taking his cock yet again. "And as long as you're moaning from being fucked by me of all people...I'll talk as tall as I want."

She was grinning from ear to ear as she looked back, past her shoulder, and captured his stare. "Less talking...m-more fucking...little. Brother."

Every time she opened her mouth, whether it was to tease Rashidi or moan his praises, she brought out more of the man that he'd become in his time at the university. She was genuinely impressed that he was ready to go again so quickly, and after just a couple of thrusts, his cock was throbbing with the same vitality it held when he first caught wind of her enticing aroma.

Feeling it firm up inside of her was an intimate experience, more than she expected it ever could be. In that, there was an affection that went deeper than the bonds that they already shared, but that unexpected moment of tenderness didn't take away the hard, brutal edge of Rashidi's advances when he found his rhythm.

It could have been the taboo of their mating, the way that she'd pushed him to the brink, or the alluring looks of her bodice...but whatever it was, Realis would take all the credit for her brother's rapid pace, along with taking every inch of his member.

"Whimpering already? After pushing me like that?" he asked. His knees were getting sore against the harsh wood of the floor, but he did his best to keep his place and his pace as he wrapped his arms around the front of her thighs. With solid purchase and a firm hold, he pounded into Realis as aggressively as he could, only to find her body rising up slightly to meet his thrusts in the middle. "I expected more of you, sis..."

"And I expected you t-to...to pace yourself," she explained. Her tail was already snaking up along his leg and wrapping around his thigh as he pummeled her body from behind; she'd keep him inside for the second climax, no matter what it took. "But if you're so determined to wipe yourself out and fill me up again, then...b-by all means, Rashidi...flood me."

The floor creaked with the impressive, lunging force of Rashidi's thrusts. His claws raked over the inner thighs of his own heated sister, and behind them, he propped up on the balls of his footpaws, wanting a little extra weight behind the last pumps that he could manage.

It was Realis who was caught by surprise, however, when she felt his change in posture...but didn't feel the gushing warmth of another release, as she expected.

"I've felt you squeezing my cock once before," Rashidi told her. "I know what it feels like when you're getting close, and you're not _nearly_close enough for me to do that yet."

With a new angle and a deeper reach, it didn't take him long to close that gap, but Realis felt her jaw dropping with the most pleasant blend of shock and delight as the first thrust came and went: before she knew it, the first minute had gone by, with a small puddle of her natural juices forming between her planted knees.

"O...Okay, Rashidi...y-you can cum, now!" she told him, but there was a hint of pleading in her voice as all of her efforts went into keeping her ass lifted for his thrusts.

She could feel his grin before it spread over his lips, and in as much, she knew he wasn't going to bend to her whims that easily. "Nope," he countered, easing back just enough to roll his hips against her bouncing thighs. "Not yet."

Gritting her fangs and glaring back at her sibling, Realis tried to lift herself to his level of control, but under the burden of her heat, she simply couldn't manage it. "You're being s-such a fucking tease!"

"And you're loving every minute of it," he pointed out, but he couldn't do so without skipping a beat: as much as he was the one in control, he couldn't ignore the bliss of being squeezed by such an eager passage...his sister was making that overwhelming heat work for her, and as the passes piled up, Rashidi felt his resistance crumbling. "And I guess it...f-feels pretty fucking good."

A cheekier grin captured Realis as she turned her face away and focused on meeting his thrusts once more, able to feel the tremble in his touch and the quiver in his thighs as his climax approached.

"All that money on college, and the only thing you had to share with me when you got back was your 'dominance,'" she teased. "And even a uni professor couldn't teach you...n-not to fuck your own sister, hm?"

"You act like who you are makes any difference to me when you're fucking back on me like that," Rashidi argued. "Kind of a moot point when you started all this, anyway."

"If only you had some self-restrai-

"I'll show you f-fucking restraint," he growled, cutting her off and snaking his arms up under her torso. She missed his touch on her thighs, but delight replaced her disappointment as his palms cupped her breasts from underneath. Holding her tight, he leaned into her lower back and drove the length of his cock all the way inside of her, and feeling her clench, he offered up another dose of his seed in return.

Their new pose created a deeper, hotter connection than they'd known before, and Realis sighed in heavenly content as she felt the internal throb of her brother's second, impressive release.

"So that's what your dominant side is like," she whispered, but she could only faintly manage the tease before his deep, pounding thrust took her next breath away. As she felt his cum pouring into her already flooded womb, she seized up around him to toy with him, at first, but...the new, delicious seed that began easing back out of her pouted, tender folds forced her to clench around him and hold him in place, milking him through every second of his climax. "I love it, little bro...I...I fucking love it!"

She was beginning to wonder if it was her heat that brought such forbidden words to her lips, or if a deeper, budding connection was coming to fruition between them.

**

The weekend was more fulfilling to Realis' needs than she was able to realize, until the time she'd spent with her brother was coming to an end.

With a clear head, she woke up the morning of his flight and saw that some of his mess was still dripping from her petals, joining the mess that was already soaked into the bedspread, and the inside of his thighs.

The haze of her estrus was gone, but the lust that she'd come to feel for him still remained.

"You know...we're never gonna make it there on time if you keep stopping me like this."

"We might be able to make it on time if you'd turn down even one of my advances."

Rashidi snickered. "I guess I'm not completely innocent in this, am I?"

It would have been silly for him to deny his guilt in the whole matter as he pushed her back into the frame of the doorway, but before she called him out, he was briefly considering it.

Without her heat to blame for their actions any longer, they were playfully tossing the concept of guilt back and forth, each one trying to claim that the other was the party responsible for their forbidden games.

"This is all your fault, as far as I'm concerned," Realis claimed. With her legs hiked up over her brother's shoulders, she was at his mercy once more, but she was delighted to rock against his hips from a lifted pose; she felt completely dominated by his touch alone, but the way he took the lead with her body reinforced the kind of lover that he'd become...and it was one she was happy to experience. "If you had a bone of resistance in your body, we'd never had gotten into this mess in the first place."

"And if you'd remembered to take a heat suppressant, I wouldn't have had to resist anything, so...watch where you're pointing those fingers, sis."

She reached out and delicately poked the end of his muzzle; a quiet giggle followed, but she didn't allow her touch to linger on his lips.

Careful fingertips worked down to the base of her own shaft, and as she kept a soft stroke upon it, she did all she could to bounce back against her brother from the compromised pose. She knew he'd control the pace of their lovemaking until the very last thrust, but she didn't dare to complain about that.

With the aggression of her heat aside, and Rashidi's near hypnotic response left behind, she was finding him to be quite the passionate and caring lover, in addition to his impressive skillset. His hips didn't just slam into her body, but rolled into her thighs as their forms came together. He knew just when to go a little deeper, and when he felt her inner muscles clenching without warning, he eased up and gave her passage something long and firm to squeeze...just as it needed.

He'd learned how to listen to someone's silent, physical actions as much as their words, and Realis was the benefactor of every lesson he carried with him.

"And when I tell everyone that I'm knocked up...t-then...where do I point that little finger?" she asked, giving him a knowing stare. She couldn't be completely sure yet, but after spending a whole weekend sampling his cock and the warm, wonderful seed it offered, she couldn't imagine that at least one of the loads didn't take.

Of course, she'd turned the tables on him once or twice, and the pair of hermaphroditic twins had both come to take plenty of the other's essence; Rashidi was wondering the same thing about his own body, and the mess that Realis had left behind.

"If you're bold enough," he paused, clenching his stomach to draw a few extra thrusts out of their last mating, "Go ahead and point it right at me...t-that is, if you really think it took."

As if he was a little nervous about the topic, Rashidi dramatically picked up the pace, and Realis found herself gasping desperately as his length pumped into her body. Pinned up against the frame of the door, she was left scrambling for purchase as his cock stretched her out inside, giving her the most delightful sensation of fulfillment...but there was still one more step left before she'd know proper satisfaction.

Stroking the base of her own length with a frenzied paw, she knew she couldn't deny the idea of being knocked up by her own brother; he could see the lust playing across her face in a devious grin.

"I bet you wanted it to take," she claimed, knowing she could stoke one last fire in his loins. "Bet you wanted to give me a fresh litter with every f-fucking load, didn't you?"

Rashidi's eyes rolled back as his sister combined a smoky, teasing voice with a series of rapid, playful grips around his shaft. He was doing all he could to hold out, but that inner clench kept him from thrusting as rapidly as he would have; he could only pump a series of quick, choppy thrusts into her bodice and accept the inevitable.

"You say that like...y-you didn't want me to knock you up every time," he claimed. Even without the miasma of her heat, he made those bold, forbidden claims, ignoring the taboo of such an act between them. "Like you don't want this load...t-to...fill you right the f-fuck up! Mnnf!"

Gritting his fangs and pounding forth with the last of his vigor, Rashidi shook the walls around Realis and drew a gasp from her: she didn't know he had that much left in the tank, but feeling the uncontrolled flutter of her tender passage around his tool, he didn't see any point in trying to last longer.

The gush of his seed was impressive every time, but especially after a weekend of long, draining romps, Realis was shocked that she could feel the volume of her brother's yield in her womb. "Feels like it doesn't matter what I want," she teased, but she found it a struggle to keep pushing his buttons. Her thighs were quivering against his body, and finally, her calves clamped down around the back of his neck as that warm, silky flood pushed her over the edge with him. "You're...a-already cumming, _little_bro..."

He didn't have the voice to lash out at her for that tease, but she felt her whole body lifted into the air by a deep, bucking thrust. She gasped, silenced by his efforts, and watched as his excess began trickling out of her tender, taken petals.

In the aftermath of their quivering, clenching finale, the only sounds were the rapid, desperate panting of their breath, and the quiet, distant plip of their mingled juices as they formed a final puddle by the front door.

There was plenty of evidence that they could easily wash away from their weekend together, but each of them was already carrying a reminder of their taboo that they couldn't simply ignore...