Dynamics Pt. 04

This is a short work of erotic fiction containing furry, or anthropomorphic, characters, which are animals that either demonstrate human intelligence or walk on two legs, for the purposes of these tales. It is a thriving and growing fandom in which creators are prevalent in art and writing especially.

All work is fiction intended for fantasy only, regardless of content, and consent must always be acquired when engaging in any sex act with another adult.

Please note that all characters are clearly over eighteen and written as such in all stories.

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She wasn't pushing him but was leading him in to offer him something more, allowing him the room to speak. Even though his tail lashed back and forth, the strained cougar tried to hold it back and down, grunting thickly in the back of his throat.

"Tell me, Mark."

Oh, that command... That was what changed it for him. That had him straightening his back ever so slightly, his breath hitching and catching.

It was everything he needed. For, if Mercy was in control, that meant that everything was okay. She'd never do anything bad to him and he could trust her, for it was that very trust that resided at the core of everything.

It was something that he had not paid due attention to before, though he knew how important it was, even as he focused on how good her small chest felt against his back, the warmth of her seeping through.

Oh...

Was it... He struggled mentally, though the reassuring squeeze of Mercy's arms around him let him know that everything was okay. He didn't have to worry, even if his heart was pounding, even if his hackles were trying to rise, the fur all over his body prickling up and trying to stand on end. Even Mark's tail was a little fluffier than it had been before.

"I..."

"Tell me, Mark."

"I want..." Oh, it was so hard for him to get the words out. "I want... It's...exciting to think...of it...of you..."

He couldn't get the words out, though he hoped that it would be enough. Or did he not want it to be enough? Something was changing, something was shifting, something that they could never go back from. It felt like it was spiralling out of his control and into Mercy's all at once, though he was glad too, in a way, that it was not the case that nobody was in control.

Especially for the cougar, he needed somebody to be in control.

"That's okay, brother," she said, her lips very close to his ear. "You're okay... I want this too."

They didn't say it explicitly, though he caught himself letting out a breath, eyes half-closed even though his body had become electrified. He thrummed with desire, his hard-on pulsating softly, though it did not yet feel as if it was fully hard quite yet. That wasn't the most important thing, however, even as it was an outward demonstration of his enjoyment of the moment, how it throbbed and pulsed lightly, a smear of pre-cum cooling right at the tip.

For a moment, they were quiet, sexual tension charged and crackling in the air while the din of rain on the roof of the van filled the space around them. Yet it was not enough to cover the desire building, strung out between them like a cord that was just waiting to be snapped -- yet the moment in which it snapped would leave them with one another, facing the lust in the room that had been swelling without either of them acknowledging what lay there.

Mercy growled faintly and a shock ran down his spine, straightening swiftly against her.

"Okay," she said quietly, though her tail swept wantonly back and forth through the bed, stirring up the sheets, betraying her excitement still. "Then... Your safe word will only be safe word. If you want anything to stop, at any point, you will use the safe word. What is your safe word?"

He blinked, not sure what she wanted for a moment. Hadn't she already said it?

"My safe word...is safe word?"

Why did that make him tingle all over?

"Good boy," she said, her voice dropping into the hint of a purr. "Now... When do you use your safe word?"

Ah, now he understood. She was making sure that there was a clear stop for both of them, once again looking after him and proving herself to be someone that he could trust. After everything that he had gone through before, he had to run through that in his mind, making it clear to himself while Mercy did exactly the same.

"I use my safe word whenever or if things are going too far, if I want to stop at any point."

"Or even if you want to slow down or say something," she stressed. "Anything at all. And now..."

She moved over him, kicking the sheets aside, for they would not be needed as passion was allowed to roar between them. He caught his breath, but she was on top of him in but a moment as her paws slid over his shoulders, lightly pinning him in place. Even though Mark would have been able to wriggle free from her at that point...

Oh. No, no, he could not squirm free of her. His sister closed her powerfully muscled thighs around him and squeezed, letting him feel the inherent strength of her body, what she honed every single day of her life, her fingers curling around his shoulders.

"Ooof..."

He let out a low, needy groan, though his heart was pounding so heavily that he didn't know whether he was listening to his heart beating or the drum of rain on the roof. He didn't even know if it mattered anymore, not as things changed, the shift of desire between them not something that could ever again be put back as it was.

They had to see it through, especially as she pinned him in place, casually controlling him physically and putting him in the position that she wanted him without seeming to take a second thought about it.

"I'd tell you to strip but it's so much more fun to do this myself!"

Her words came with a twist of relish curling through them and Mark barely had a moment in which to gasp, though there was a moan wound through the depths of his cry too, as if his soul had to set it free.

"I'll take the lead."

He didn't say anything, wanting to see, though he felt as excited as he felt safe as she ripped his shirt off and over his head, though it felt as if he had not put it on all that long ago. Mark whimpered as he flicked his tail, wanting to be soft and amenable for her, even if the cougar never had to consider the hiding of his arousal anymore. No, his hard-on stood up hard and proud through his underwear, impossible to miss with the spot of dampness where the head of the shaft was.

"Ohhh..."

"There's a good brother, hm... You like this."

Mercy smirked and he caught the glint of her eyes in the low light. He loved how she stated things as facts, like there could be no question about it.

Mercy stripped his underwear off too, though she was rougher about it. She yanked them down quickly, which had the effect of making it so that his cock didn't catch in the cloth, for which he was grateful. It was almost painfully hard, springing up with a throb of desire, though Mercy did not touch him -- not just yet.

He'd never done "it" like that before but...it was different. For she was so much stronger than his ex-girlfriend and they would never be the same, even if Mercy came with a dominant, powerful brand of domination that Mark had never before even thought could exist. All as she pinned him forcibly with a hand on his chest, pressing her weight down into him until he whined and gasped.

She knew exactly where her own limits lay, bearing down on his chest enough to remind him that his ability to breathe could be compromised. Why, he could even feel the bruises forming even then, though Mark was sure that there would be no lasting damage either, but he could use his safe word if he was ever worried about anything.

"Unff..."

"You're going to be so good for me, brother," she purred, grinning widely, her purr almost disrupted by how big her smile was. "I can't wait to feel you..."

He didn't know just what she meant or how far she was going to go with him, though Mercy well enough led the way with her hand around his cock.

"Ohhhhh, fuuuuck!"

She smirked but he didn't catch what she said, not as need roiled within him. He had not known that something that powerful could twist in the pit of his stomach, although it was very much not desire. He twisted and tried to push back against her paw on his chest but it was the weight of her that kept him there, once again letting him know how small and insignificant he was in comparison to her.

Mercy could really do anything to him and yet...she wasn't going to. And his cock was so hard, so very hard, all as she languidly stroked him, feeling out his body, exploring him. She was as firm as she needed to be, squeezing his cock, her fingers easily going around him, though he was a comfortable size.

Yet she slumped over him, her arm across his throat as the feline struggled for air. She did not bear down too much but the exact right amount for him to feel the restriction, able to claw at her, to fight back, to do something -- all while she kept him right in place, exactly where she wanted him to be.

"Oooofff... Nnnggghhh..."

He groaned deeply, though his attention was purely focused on his cock, how it felt throbbing in her paw, his head spinning and spinning. Passion was mounting and Mark feared that he was going to blow right there and then, even if that didn't seem as if it was going to be anything of a problem, not anymore. It was not as if she was going to do anything bad to him or say anything bad to him, for his orgasm was for her, however Mercy wanted to take it from him.

Her arm across his throat though, putting pressure on the side of his neck, bore down, making him gulp, his chest tightening, the urge to breathe leaping forth. And she knew the effect she had on him too.

His mind didn't know where to go, jumping between his cock and his throat, how every breath of air felt as if it was hard-won, needing it more and more, even though he had just enough air to keep himself going. His shaft ached as she pumped her paw over it, though Mark could not have said what was going on in the cougar's mind, no, not at all, even if it did not matter either. As hard as she was being with him too, his cock seemed to throb even more, his throat sore, the pressure there simply exquisite.

Yet the feel of her arm across his throat, cutting off and restricting, even if only partly, his ability to breathe came with an intoxicatingly dangerous edge to it too, an edge that had his chest rising and falling sharply, making him wonder if he was okay there, if he was in the right place. He could have clawed enough air into his lungs to speak if he'd needed to but...he didn't need to use his safe word. Not with her thumb smearing tenaciously over the head of his cock, pulling a bead of pre-cum down to teasingly lubricate his length, her paw working him over, gripping him even as her teeth danced in an open-mouthed grin.

"You're so hard for me already, brother," she said, seeming to take a thrill from calling him her brother, even then. "Damn... Since you turned up here... I've only wanted to drag you back here and get you eating me out, riding you..."

"Unnff..."

He squirmed and blushed hotly, heat crawling down his neck as if it was determined, one way or the other, to make itself known. Mercy felt it that time, his body aching for her, rolling up, losing control. He didn't need to concern himself, not even as pre-cum drooled down his cock and he realised that he was grunting and thrusting, that she was having to increase the pressure on his neck just to keep him in place.

Yet, of course, Mercy had to turn the tables on him, right at the point of orgasm.

"Come here!"

Her growl ripped through him and, suddenly, he was not on his back on the bed anymore. He was tangled -- tangled with Mercy! And the bigger, more powerful cougar was wrestling him, grabbing his arms, pinning them back behind his head while she caught his legs between hers. Instinctively, he thrashed, struggling back against her, though that was only because his body thought that something was wrong. It took him a moment for his mind to catch up with what was going on, bucking and arching, even though the hardness of his cock still begged for something that he should have been able to give himself.

She handled him as if he was just something to be shoved into position, her elbow in his stomach, wrapping around him as she loomed over him. The bed may have been soft under him but everything about Mercy was hard, even down to the predatory lash of her tail, back and forth back and forth.

Something in Mark lurched and he wanted to see what would happen if he pushed back, if he tried to get her to use her strength against him even more. He forced the issue, bucking his hips, growling, though the light in his eyes suddenly dared her to do it, to put him in his place.

"Brother, you are testing my patience..."

He shuddered bodily. That was all fine, within the limits, all as she grabbed his throat. But he bucked back harder against her, the cat's lips parted, wanting to feel more, to see what mercy was truly capable of.

"Unff... Brother!"

She snarled and his heart turned over, passion rising. Her fingers tightened around his throat, holding him fast, using her strength against him rather than her weight as need surged. Fuck, how could it be so hot that she was grabbing his throat, holding him down, forcing him to submit? Yet that was what he had never truly known that he had wanted. Sure, Mark could willingly submit, but where would the true pleasure be in that?

No, he needed her above him, her muscles bulging, her tail lashing, looking so predatory, so devastatingly beautiful that he would have honestly dropped to his knees and served her right then and there. He heaved and tried to kick her off but she locked her legs around his as her grip on his throat tightened, forcing him to wheeze, tears pricking in the corners of his eyes from the pressure.

It should have been terrifying and, surely, her strength thrilled him in a scary way. Yet the hardness of his cock betrayed him and he leaned heavily into him, her grip strength measured only to the point that she would not harm him.

He would be fortunate the chest day, his chest heaving for breath that would not come, that she knew how to hold herself back. She could have really hurt him, if she had wanted to, though that would never have crossed Mercy's mind. She wanted to claim him, to use him, to dominate him -- but that, of course, meant that there would never again be any lasting damage made to him.

In the interim, however...

He fought and gasped and yet...it was glorious to submit to her paw around his throat. To know that she was strong enough to handle him that roughly, even though it should very much have been something that scared him. He could be scared and he could be aroused, both at the same time. That was definitely new to him, but all in a way that left the cougar wanting more, hungering for more.

Only when he went slack, submitting completely and utterly to him, did she relinquish her hold on his throat, where she had been putting pressure on his windpipe, allowing him to drag in full, deep gulps of sweet, clean air. He needed it, yes, all so very badly, yet he needed Mercy more, all in a way that he could not have envisioned craving before he had reconnected with Mercy that weekend.

Things were different, very different, though she nipped sharply at his throat. His paws were up above his head and there was a weight on his wrists, pinned there, though he was giving in to it. He needed her, needed that control even as her lips, suddenly, came roughly down on his.

He'd never had a kiss like that before, one that felt like it was sucking the life out of him, making him dizzy with sin. Oh, Mark knew that she was his sister and he should not have felt like that, but he still kissed her back just as deeply, just as passionately, heaving and grunting, her tongue dominating his mouth. It jabbed into his mouth forcibly and yet the force of her lips on his bruised them, her teeth grazing his lips.

If only he knew just how rough Mercy was willing to go with him... Maybe he would have crossed that line with them sooner, though Mark could rest assured that he had his safe word, if ever needed. That gave him a kind of security that he had never felt before, even as his cock throbbed and Mercy rolled her body sensually down against his, letting him feel the brush of her fur along the hot length of his cock, how she moaned and how he panted heavily into her mouth.

Yet her lips broke from his harshly, not paying attention to where her teeth were going. She growled and it took him a moment to realise what was happening as she bit into his neck. Yet it did not last long enough for him, too fleeting, almost like a love bite rather than the sinking, deepening crunch into his flesh that he had not realised that he had ached for. If she could wrestle and pin him into submission with her superior strength, by far so much greater than him...that meant that he could lean into his fantasies.

The fantasies that had darkened the seductive reaches of the back of his mind. He had not delved deeply, but he needed more.

But Mercy did not sink her teeth into him again, instead pushing over him, keeping his arms roughly pinned up above his head and out of the way, ignoring how his tail flicked back and forth. She spared only a moment to rip her underwear off, for it was not as if she had put all that much on either, lifting her arms to drag her T-shirt off too with such force that the seam split on one side.

He was gifted with her glorious outline, the light from outside the van in the late afternoon and early evening still illuminating the edge of her, though it was still a grey light with all the rain outside. But her thighs closed around his head as she loomed over him, grinding the sweet heat of her sex up to his muzzle.

"Lick."

She would have forced his head in so that he was forced to, though Mark was more than willing. It was too easy for him to sink into it, to feel everything, even knowing that she was his sister. He couldn't even move his head from one side to the other with the force that she put around his head, muscles bunching and contracting.

Mark didn't need to move, not as he ate her out. And, yes, it needed to be a crude term that time, for she was his sister.

"Mmm... Deeper, brother!"

The order was snapped and, still, Mark found himself leaning into that for security. He had all the physical security that he needed, even though it was hard to breathe. Why was it hard to breathe? He couldn't see, not then, that Mercy had rolled her weight back a little more so that she rested on his upper chest and collarbone, her tail sweeping across his stomach, even brushing his dick. And yet he didn't need any help at all to remain hard, no, not with the tartness of her pussy on his tongue, his lightly raspy, feline tongue driving up inside her.

Her folds parted beautifully around his tongue and Mark knew that his only will, right there and then, was to serve her, to please her. There was nothing more at all that needed to clod his mind or worry him in the slightest, though she shifted her weight so that her legs came down around his arms. Mercy so very easily pinned his arms to his sides so that he could not even use them, being squeezed from either side, gasping and heaving.

Yet the light air deprivation drove him on, forcing him to fight and claw mentally to please her, to need her, to show her that he was there for her -- submissively, of course. He would never have imagined that eating out his sister could be so intoxicatingly hot, not like that, but he lost himself in it, in the tight push of her thighs, closing around his head like a vice.

And yet Mercy did not hold him so tightly that he could not please her, hissing out her pleasure as her tail lashed and lashed. He dipped his tongue even more deeply inside her, plundering her pussy as she had swept her tongue around his mouth, yet they were both very different things. One was in submissive bliss and the other was in dominant glee, though they went hand in hand.