An Injust form of Justice (Injustice 2)

/N: An Injust Form of Justice was a commissioned one shot originally written back in April of 2021. Posting it up here and now for people to enjoy!

Themes: Dom/Sub, Master/Pet, Rough Sex

-x-X-x-

It'd been a rough decade for Earth, there was no doubt about that. First Superman had gone bad and turned into an all-powerful tyrant, and then just five years after Batman had managed to put down Superman and his Regime, the Society had cropped up under the control of Brainiac and nearly destroyed everything all over again.

Sometimes, it seemed almost hopeless. The relentless, never-ending tide of threats. The countless enemies who just wanted to hurt and destroy, who were just looking to do damage to whoever they could without a care for who got hurt in the process. Really, it was enough to drive a man mad.

Luckily for Bruce, he was already some form of insane, so he just kept soldiering on, turning his own brand of madness towards the productive task of rebuilding. Unfortunately, he didn't have the luxury of just destroying everything, or resting on his laurels while his sycophants handed him Earth on a silver platter. He had to, and always would, work for everything he had ever accomplished. And no matter what, the work was far from done.

At least for now, things had once again calmed down. Brainiac had been defeated and used to restore Earth's cities. Superman had been depowered with Gold Kryptonite and imprisoned in the Phantom Zone. All of their patsies, all of their subordinates, mostly monstrous villains in their own right, had been taken care of.

Things were actually looking up… but that didn't mean there weren't speed bumps along the way. And more than anything, Batman knew one thing for certain… he couldn't allow anything like what had happened with Superman to ever happen again.

The only problem with that was… Supergirl. Kara Zor-El, the young blonde Kryptonian who was supposed to be Kal-El's older cousin. Instead, her ship had gotten knocked off course apparently, and she'd shown up at Earth much later, long after her cousin had grown to be the man… and eventually the tyrant he'd ultimately become.

Kara… Kara hadn't done anything wrong. Of course, there was the fact that she'd been manipulated by Black Adam to free Superman in the first place and try and reinstate the Regime, but she hadn't understood her cousin's tyranny at the time. As evidenced by the fact that once she DID learn of his tyranny, Supergirl had ultimately turned against him.

More than anything, Bruce knew that taking action against Kara just because she had the potential to be as bad as Clark… would make Bruce himself just as bad as Clark. Striking Kara down, depowering her, imprisoning her when she hadn't done anything wrong… it would be the height of hypocrisy, and his own personal sense of justice wouldn't allow him to pull that trigger.

At the same time, his twisted fucked up mind wouldn't exactly allow him to go and leave such an obvious threat at his back either. Just as he'd done with the original Justice League, Batman had found himself making contingencies late at night in the Batcave, planning for the inevitable betrayal. Except this time, he couldn't be satisfied by even that. He needed to be actively deterring such an eventuality without compromising his morals.

It was impossible, of course… and in the end, he'd compromised his morals just as much as he was willing to. He'd bent, rather than break. And that… that had led to where he was today.

The Earth was on the mend. They were repairing not just the world, but the civilization that had so thoroughly taken a beating not once but twice in the last ten years. Rounding up criminals who were taking advantage of the chaos and using Brainiac to put things back where they belonged. It was a lot of work, and Batman found himself as the head of a new Justice League. It wasn't a position he'd ever wanted, but it was where he was most needed.

Kara, meanwhile, needed an identity. Not just as Supergirl, though he'd offered her membership in the Justice League and she'd accepted, but she needed a civilian identity as well. Especially given that there were still a LOT of people who were understandably traumatized by Superman's colors and symbol. The S did not stand for hope for most Earthlings any longer.

Given that Kara couldn't really go shopping in her Supergirl costume without causing an incident, it became necessary to manufacture an identity for her. And in doing so, Bruce had let his need for preemptive action… breathe just a little bit. He had control issues just as much as his enemies, to be fair, but unlike Clark and Brainiac, Bruce wouldn't let his control issues control him.

That said, Kara needed to be watched without truly being watched. She needed to be taught carefully and brought into the fold properly. Hence, Kara Danvers had been born. He'd essentially created her human identity out of thin air, and in the meantime, taken her on as his secretary at Wayne Enterprises. That had certainly been a tense moment… for him, anyways.

But he needn't have worried, not truly. By the time he'd presented the idea of her taking the job under him at Wayne Enterprises, he'd also already made her his second in command in the new Justice League. Having declared emergency Martial Law in the wake up Brainiac's attack, Bruce was very carefully toeing the line between keeping debate low and action high, while not actually taking over as dictator like Clark had done.

In the meantime, Kara was his second, his right-hand woman. Not only was she capable, but he wanted her to feel… needed. He wanted her to feel acknowledged. So he'd made sure she did.

And then he'd taken her on as his secretary, effectively subordinating her to him in both of her identities. If she'd noticed and was upset by this manipulation, she hadn't said anything. As far as he could tell, the alien woman didn't understand what he was doing. That was good, because if she'd figured it out, Bruce would probably have been in trouble.

As it was, he knew he was stretching his own morals… but he didn't see any other way to accomplish his goals. He wasn't about to lock Kara away just because she was a Kryptonian. But at the same time, he needed to know she wouldn't be a threat.

And so, while rounding up criminals as Batman and Supergirl of the Justice League, they were also spreading Wayne Enterprises across the world in a humanitarian relief effort as Bruce Wayne and his ever-present, wholly capable secretary Kara Danvers. To her credit, Kara really did take to the job like a fish to water. And all the while, the two of them had gotten closer and closer.

Bruce wasn't proud of what he was doing by any means, but he acknowledged the necessity of it all the same. It was an inevitability, really. Kara was young and unsure of herself, and he was a strong male figure in her life that provided her with security and a sense of belonging. The fact that she'd developed a crush on him over time hadn't been all that surprising… in fact, one might say Bruce had encouraged it. And in the end, when they fell into a whirlwind romance together, he'd encouraged that too.

Anything to bring Kara close to him… anything to bring her to heel. As Batman and Supergirl, they were Leader and Subordinate. As Bruce Wayne and Kara Danvers, they were Boss and Employee. And then they became something more, a third thing added on. They became lovers, and within weeks of Bruce accepting Kara's feelings for him and returning her affections, they could barely keep their hands off of one another.

Sometimes, Kara would even schedule a fake appointment for him just to have an hour alone together in his office. Bruce always knew about it of course, and always kept her from bumping anything too important while still allowing her to do it, a subtle reminder that he was in control, but that she was still free to act how her desires guided her to.

Sometimes, they would end up fucking right on top of the League round table, the two of them conducting League business late at night…

All in all, their romance, as well as both of their work relationships… Bruce certainly didn't mind Kara. She was a decent woman, and he appreciated her, for all that she had the power to cause untold amounts of damage to his planet. But he needed to rein her in. He needed to make sure she WOULDN'T cause that damage.

And so, Bruce had come up with a plan. A plan to condition Kara to be ready to submit, to be ready to accept his authority above all others. He'd started out gently, experimenting a bit with some light dom-sub play. He'd always been on top, and Kara had been happy to play around with some light bondage, mostly just a bit of rope that they both knew she could have broken free of at any time.

Now though… tonight was the night Bruce intended to take things a step further. Tonight was the night he was going to see about beginning the true taming of a Kryptonian…

-x-X-x-

The moment they're inside with the door closed behind them, Bruce is pushing her up against it and kissing her quite aggressively. Kara lets him. After all, why wouldn't she be willing to do this for the man who is superior to her in every way but the physical. For all that she's Kryptonian, this human man has proven capable of standing up to Gods and Titans, to Tyrants and Maniacs alike.

Needless to say, Kara more than looks up to Bruce at this point. She downright idolizes him, and to be able to say she's in a committed relationship with the man is one of her proudest claims at the moment. There's nowhere she'd rather be then right here with him, as his woman.

A moan leaves Kara's lips as Bruce gets handsy with her. They've just returned from a date… a date where Kara MIGHT have spent a bit too much of the meal teasing Bruce beneath the table with her foot, wanting to… well, antagonize him until he was all worked up. Needless to say, the handsome human man was certainly randy at this point, and as his hands slip into her dress, one going to her breast and the other betwixt her thighs, Kara makes sure to make herself available to him, presenting her body for him to play with to his heart's content.

When Bruce's hand curls in her hair, Kara moans and lets him tug her along. She allows him to direct her over to the couch, where they sit down and continue their fun, her in his lap. Once she's there, he goes even further, slipping three fingers into her already wet folds, playing with her hungering snatch even as their tongues dance with one another and they exchange spit.

Kara wraps her arms around his neck and laces her fingers behind his head as she bucks her hips into his questing digits, gasping and moaning into his mouth in equal measure. He's so good with his hands… he knows just how to make her moan, just how to make her sing. She's getting closer and closer to orgasm when he suddenly stops and pulls his hand back.

Blinking, Kara disengages from their kiss and pulls back as well to look at him in confusion. Had she done something wrong?

"I want to try something new tonight, Kara."

A shiver runs down the blonde Kryptonian's spine and she bites her lower lip at the reaction that his 'authority' voice has on her. That's the tone of voice he uses when he expects to be obeyed, and usually he keeps it out of the bedroom and their relationship, reserving it solely for their encounters as Batman and Supergirl, or in the office at Wayne Enterprises.

But she has to admit, recently he's been using this tone with her in this sort of setting more and more. They've been experimenting with a bit of roleplay, even tying her up a bit in rope. Kara can't say she hasn't enjoyed it. It's a fun enough distraction, and hearing his tone, she smiles, assuming she knows exactly where this is going.

"Mm, yes sir? Whatever sir desires…"

Her sultry tone brings a fond smile to Bruce's face, but then he shakes his head.

"Don't agree until you've seen what it is. That said, I want you to keep an open mind, alright?"

Kara furrows her brow at that, a little more concerned. In the end though, she has no reason not to trust Bruce… or Batman. In every possible way, he's been there for her where no one else has. She'd thought she could trust Black Adam, but only in the aftermath of Brainiac's attack did she realize that the man was in league with her cousin… her cousin, who had become a tyrant and who had done terrible things in the name of his 'justice', in the name of power.

Batman, despite having no real powers, despite being an admittedly brilliant baseline human, had ultimately been the one to defeat Kal-El. Not once, but twice, and in the end, Kara didn't fault Bruce for his choice to use the golden Kryptonite to depower her cousin and exile him to the Phantom Zone. And in the wake of all of that, she wouldn't have faulted Bruce for distrusting her on principle as well, just as most of the human race did.

She may not be her cousin, but she was Kryptonian, and Earth did not have good memories of her people, not anymore. And yet… Batman had seen the good in her. Bruce had given her the opportunity to be more, to be a hero. She would never forget that.

"… Alright."

Smiling at her and nodding, Bruce reaches down over the side of the couch. Kara watches as he unclasps a lead container that she'd missed before, and her eyes widen as he pulls out a Kryptonite collar. Immediately, she feels her strength being sapped as she rears back as if struck. It's not Green Kryptonite though, thankfully. It's Red Kryptonite, with the same properties as a Red Sun Lamp, stripping her of her Yellow Sun-given abilities. Unbeknownst to Kara, it has another lesser known effect that her cousin never got around to telling her about. Namely, it loosens up her inhibitions.

Staring at the Kryptonite Collar wide-eyed and wary, Kara darts her gaze to Bruce, only to find him watching her with a measured look.

"Bruce… what is this?"

Smiling softly, he holds the collar aloft.

"An idea. An… expansion of what we've been trying out recently. It will only be temporary, and this particular brand of Kryptonite can't kill you. Only weaken you enough that you won't be able to break free of any rope I put you in. We both know you could have snapped your way out of the bondage we've been playing around with of late any time. It removes some of the intensity from the encounters, don't you think? With this… we can go all out."

Kara flushes, as he patiently and calmly explains his reasoning to her. On the one hand… she'd taken some solace in always knowing that she could snap her bindings if it really came down to it. On the other hand, he was right. It did remove any potential risk for her if she had the full extent of her abilities while tied up. Likewise, he could never really manhandle her so long as she was fully empowered by Earth's Yellow Sun. She always had to be careful to watch how he was moving and move with him, lest she become harder than a concrete wall, rather than the malleable woman he so loved to make love to.

As if to prove his point, Bruce reaches out with his free hand and casually gropes one of her tits through her already disheveled dress. Kara gasps, her eyes widening slightly at the sensation. It's so much… more with the Red Kryptonite right there. His fingers dig into her breast, and she lets out a wanton little mewl as she in turn pushes her chest out into his touch, shivering in delight.

"Trust me, Kara. We'll have fun together, you and me. And if you ever want me to stop, all you have to do is say so."

Believing him, believing in him more than anything, Kara hesitantly nods. With her agreement, she pulls her hair out of the way and presents her neck to him. With a smile on his lips, Bruce places the Kryptonite collar around her throat, locking it in place. She shudders as it settles like a heavy weight around her neck. In all honesty, it's probably the heaviest that anything has ever felt, due to her current lack of strength and power.

She feels as weak as a kitten as he takes her wrists in his hands and brings them together in front of her, his eyes aglint with desire and arousal, even as he slowly pulls her from the couch towards the bedroom. For the first time, Kara is forced along by his superior strength, stumbling a bit in surprise at how easily he manhandles her. She blushes as his smile grows wider, and then they're in the bedroom and the rope comes out.

He strips her out of her dress first of course, and then takes her arms behind her back and begins to tie her up. It's nothing new at this point, and yet at the same time, it's a wholly unique experience for the blonde Kryptonian. On the one hand, he's already tied her up before… on the other, this time it's different. This time, she knows without a shadow of a doubt that she can't break free, even if she wanted to.

There comes a point of no return, and then she's trapped, helpless. The only way she's getting out of the crisscrossing rope bondage that he's restrained her in… is if Bruce lets her out. The realization makes her begin to pant, her breathing turning uneven as her thighs rub together. Kara has to admit, the complete loss of control… it IS a little intoxicating. She wouldn't trust just anyone with this sort of power over her… but she trusts Bruce.

One hand slides through her hair and pulls her in for a fresh kiss that Kara happily returns. The other wanders her body, playing with her tits and her rock hard nipples at first, before diving down betwixt her thighs, feeling up her dripping slit. Everything he does to her feels amplified, but Kara understands that that's just because all previous sensations were muted by the powers gifted to her by the Yellow Sun.

Thanks to the Red Kryptonite in the collar locked around her neck, she's as powerless as a lamb, completely at Bruce's mercy… and honestly loving every moment of it. Until, of course, he doesn't let her cum. She's bucking her hips against his hand, grinding her quim into his palm, and moaning up a storm as she nears the point of no return… when he suddenly pulls back and holds her firmly in place until she calms down.

As she stares at him, feeling a little betrayed at the sensation of her ruined orgasm, Bruce just smiles at her, his gaze flinty and hooded.

"Not yet, pet."

Blushing at the nickname, Kara can only lower her gaze and respond in a demure tone.

"Of course, sir…"

But then he keeps doing it. He keeps… toying with her. It's torturous for poor Kara. Normally, it's hard enough for her to cum. Bruce is an attentive and fit lover, all things considered, but he's only human. He STILL managed to bring her to orgasm before he himself cums, but usually it's only the one orgasm, unless he's feeling particularly vigorous.

Now though… now Kara feels like she could have cum a good half a dozen times by this point, if only Bruce would let her. But he doesn't, continually stopping right before Kara might have cum, right before she can reach her peak.

After a number of completely ruined orgasms, feeling like she's a teapot about to boil over, Kara whines to Bruce, looking at him with plaintive eyes.

"P-Please… please let me cum, sir! I need it… f-fuck, I need it so bad!"

She's never felt so… aroused before. She's never felt so damn needy either! Bruce just smiles at her and raises an eyebrow.

"And do you think you've EARNED the right to cum, pet?"

Kara blushes at that and hangs her head. 'earning' things like being fucked was something he'd introduced to their sex life of late as part of the BDSM roleplay. Normally, she would pay basic lip service to begging while on her knees tied up. There was always a hint of amusement to it for her though, a hint of… play acting. Now, Kara feels like she's experiencing the real deal. Panting like a bitch in heat, the Kryptonian shudders and squirms in his grasp as she shakes her head.

"N-No sir… not yet sir. Please… please may this worthless slut s-suck your cock?"

Bruce lets out a noise of approval from the back of his throat at her request and gives her a nod, letting go of her hair and body and sending Kara crashing to her knees in relief. She looks to his crotch expectantly, eagerly, but he takes his time, causing her to whine and squirm on her knees until finally… FINALLY his cock is out of its confines and right in front of her, throbbing and pulsating as his thick prick comes to rest against her lips.

She's sucked his cock plenty of times before, and in all sorts of settings as well… but as Kara looks up into Bruce's eyes while kissing his cockhead, she knows without a shadow of a doubt that this time… this time will be different.

-x-X-x-

There's no denying the change for Bruce as he slowly pushes forward into Kara's mouth. For the first time since their… romantic rendezvouses had begun, he actually feels like he's taking charge, rather than the Kryptonian allowing him to take charge. It's good, an important step to his plan… and at the same time, leaves him with a heady feeling of power that causes his cock to throb all the more insistently as it disappears into her mouth.

Flushed and blushing up a storm, Kara swallows his cock without complaint, though he can tell even she is surprised by just how easily it pushes against the back of her throat. The young alien woman is unused to being so easily manhandled. It's her first time having the strength of a human woman, and thus being weaker than a human man.

Bruce groans as he forces his cock down the back of Kara's throat, and though she chokes and gags on it, he doesn't let up, doesn't stop until he's hilted himself in between her lips.

"Gluuuughk!"

Only then does he pull back, slowly, languidly, watching as her blue eyes stare up at him in wide fascination. She's just as interested by this new dynamic that he's introduced as he is, Bruce can tell. That's good, because tonight is either the first night of the rest of their lives together, or it's the end of his plans before they can even truly begin. Bruce is going all in on this hand… and he's not going to stop until he's sure he's got what he wants.

"Gagkh! Gagkh! Gagkh!"

Back and forth he goes, sawing in and out of Kara's throat as she chokes and gags on his cock. Gurgling around his member in a way she never has before, the blonde Kryptonian experiences true domination for the first time in her life. Her naked tits, wrapped in rope, bounce and jiggle up and down. Meanwhile, her tongue writhes along the underside of his cock, still trying to contribute even in the face of her utter helplessness.

"That's it, pet. That's a good girl. Choke on my cock… show me how much you want it."

As if reminded by his crass language that what she's hoping for out of all of this is the chance to cum, Kara's efforts redouble, and Bruce groans as his cock sinks into her vacuum of a mouth again and again. Her cheeks suck in, and she does her absolute best to contribute to the face fucking he's putting her through, even as involuntary tears streak through her makeup and eyeshadow and drool and slobber coat her chin and drip down onto her breasts.

With a lust-filled growl, Bruce begins to force her further down his cock, every single thrust turning into a hilting as he proceeds to push Kara to her limits, as he looks for said limits in the first place, his eyes narrowing. Her gagging and choking reach a crescendo in this moment, his cock slamming home into her esophagus again and again until finally, he lets out a hoarse groan and begins to cum without warning.

Kara's eyes widen at that, even as her nostrils flare and her cheeks puff up. She is in no way prepared for his load, especially not with her reflexes and reaction times slowed down to that of a mere human's. She chokes quite mightily on his cum, gagging in fits as he holds her head down to his crotch all the same.

Her entire body spasms and shakes, and Bruce has to marvel at it just a little bit, well aware that normally this gorgeous pale figure has enough power to tear him into pieces with her bare hands. Right now, however, she's no stronger than your average human, and all too defenseless in the rope bondage he's tied her up in.

Finally, he lets go of Kara's head, letting her pull back off of his cock with a rasping, gasping hack. She doubles over, coughing a bit as his cum drips down her face, coming out of both her nostrils and her mouth alike, making an utter mess of her. Bruce just stands before her, watching and waiting to see what happens next.

Slowly, bit by bit, Kara recovers. When she raises her head again to look him in the eye, she licks her lips cautiously, almost trembling with emotion.

"Did I… did I do g-good sir? M-May I cum now?"

Letting a smile grace his face, Bruce responds with actions instead of words. It's the first time he can really do so after all, before he would HAVE to have outlined what he thought and what he wanted so that Kara knew how to act, how to move when he moved. But now that she's so very weak, weaker than him, he can just grab her by her blonde hair and yank her up to her feet before spinning and tossing her onto the bed behind him.

She lands with a yelp, but before the weakened Kryptonian can recover, Bruce is already atop her, grabbing her by her hips, sinking his fingers deeper into her gorgeous ass then he ever has before, and spreading her thighs to access her sopping wet pussy. His cock slides up against Kara's slit and she lets out a heartfelt moan, arching her back beautifully as her head tosses up.

"What do you think, pet? Do you think you've earned it?"

This time, breathless and whining, Kara nods her head enthusiastically.

"Y-Yes sir! I was… I was your good little cum dump, wasn't I sir? I gave you my mouth! Please sir, please give me your big fat cock!"

His member jumps at her words, and with a grunt, Bruce thrusts forward. Before Kara can fully register the sensation of his penetration, he quickly speaks up.

"You can cum now."

Whether it's his words that send her crashing over the edge, or whether it's the fact that he's suddenly buried inside of her snatch in a way he's never been before… it doesn't matter. What matters is that Kara will come to associate his permission with her orgasms, if he lines them both up often enough. With a sharp cry, Kara climaxes all over his cock as he impales her cunt with his meaty member… and without hesitation, Bruce begins to fuck her, harsh and deep thrusts into her pussy as he fucks her from behind as hard as he can.

Needless to say, the Red Kryptonite collar that Kara is wearing more than facilitates the pleasure of this part of the encounter. The blonde Kryptonian finds herself far more sensitive to Bruce's affections then ever before, and soon enough she's cumming her brains out on his dick, orgasming time and time again when previously, it took all of his effort just to eke one orgasm out of her before he himself blew his load.

Grinning just a little, Bruce fucks Kara long and hard, pounding into her from behind and driving her to distraction with his cock. He fucks her senseless, watching as she moans and squeals, as her hips push back into his own until she loses all strength in her lower body, watching as she eventually slumps forward, face down on the bed, shuddering and trembling and shivering.

There's sweat clinging to her naked, bound form in a way that there never has been before, not in any sexual encounter they've ever had together. Bruce has put that sweat there, has made Kara glisten with exertion as he fucks her fast and hard, ruthless and relentless in his goal to teach her what pleasure can be had when she lowers herself to be mortal like the rest of them.

This is an important part of everything, there's no denying that… but more important is what comes next. And so, Bruce doesn't cum inside of Kara, still not entirely confident of their species' incompatibility, or whether any normal forms of birth control would even work.

Instead, he pulls out of her cunt… and spreads her ass cheeks wide with his hands, pressing his cockhead into her back door. Kara tenses up of course, having never experienced anal before. Bruce didn't dare try before now, after all, he could easily imagine how… vice-like a Kryptonian ass would be. He didn't need to learn the hard way what it was like to have his dick snipped clean off.

"W-Wait… that's not the right hole. S-Stop. Bruce, not ther-guuuh!"

Right here is the critical moment. He's pushing Kara past her limits, and in the heat of the moment, the blonde lets her fear of the unknown get the better of her. She tells him to stop, she tells him not there… and Bruce ignores her. It's a breach of trust, and he knows it. It's something he would never ever do with a woman under normal circumstances.

But these aren't normal circumstances, and Kara Zor-El is NOT a normal woman. Bruce thrusts forward into her ass, taking the time to ply it open with his well-lubricated cock, but not stopping for anything. Kara whines and begs him not to go any further at first, even squirming in his grasp, but they both know she can't escape from him. Bound up as she is, collared as she is, she's helpless against his desires.

And so Bruce fucks the blonde's ass for the first time, taking her anal virginity right then and there. Kara starts out whimpering and begging him not to, but once she realizes that the pain is minimal and quickly replaced with a strange sensation of pleasure, the begging stops. Bruce is no neophyte when it comes to anal sex. He knows how to make it just as good for a woman as a man, and that's what he does.

Even as his cock is pressing deeper into Kara's bowels, his fingers are playing with her clit and cunt. As he drives himself into her ass, he frigs her clit in a way he's never been able to do before. If he'd tried before the collar, his fingers would quite literally have worn themselves to the bone before he'd have even made a dent in Kara's libido.

As it is now, she's soon squealing and shrieking in louder and louder volumes as he takes her to pound town, this time anally, while also providing so much pleasure to her cunt that she's soon squirting all over the bed beneath them. Her entire body seizes up, contracting and spasming as he fucks her, her toes curling, and her hands tied behind her back clenching and unclenching.

She whines and whimpers along with the moans and cries of ecstasy in equal measure, and Bruce… Bruce just enjoys her unbelievably tight ass for what it is, escalating to ramming into her as her back door becomes more and more shaped to his cock with every thrust.

Finally, with a loud groan, he cums. Filling Kara's ass with his seed is a much better proposition then filling her womb, as Bruce has no intentions of fostering a half-human, half-Kryptonian baby at this time. He fills her up all the same, and then pulls out of her and drops to the side, tugging her with him so she's laid back against his chest, both of them panting from the exertion.

It's the first time that they've BOTH ended an encounter exhausted and covered in sweat along with each other's fluids. It's the first time he's REALLY been able to take Kara to task and make her his woman, his bitch.

Slowly, Bruce begins to untie her, pulling away the rope that holds her arms skillfully tied behind her back. He rubs her wrists and her breasts and every bit of her body that was tied up, knowing well how to handle a human woman who'd just spent time in bondage, plying Kara with aftercare that she's never actually needed before now thanks to her Kryptonian physiology. And then, as she's shivering and trembling from the exertion in his arms, he gently asks the million dollar question.

"How are you feeling, Kara?"

-x-X-x-

Perhaps if she was in her right mind, Kara would have noticed that Bruce asked that question after untying her… but BEFORE removing the Kryptonite collar. As it is, her eyes heavily lidded, her body quivering in exhaustion, she's very much not in her right mind. She's still coming down from all of the pleasure that Bruce had forced upon her, panting heavily as she considers his question before eventually answering it.

"That was… the most intense sex we've ever had, Bruce…"

"You're not mad?"

Kara blinks at that and bites her lower lip as she thinks back to telling him to stop, only for him to ignore her. But even as she considers that the blonde just shakes her head.

"N-No… it was… you knew best. You just had to show me. It was amazing…"

And truly, it was. Kara had never… had never experienced such carnal delight before. She honestly couldn't even begin to put it into words, just how good it was.

Seeming pleased, Bruce casually reaches around and massages the feeling back into one of her sensitive breasts, causing her to moan breathlessly. With his other hand, he removes the Kryptonite collar finally… and it's almost maddening how the sensation she's experiencing from his fingers dulls back to the muted feeling from before as her powers reassert themselves.

"Perhaps we can do it again then. Collar and all."

Kara only hesitates for half a moment before nodding her head, not seeing the harm in it. It was fun… more than fun, it was a whole new experience. Really, she could see herself growing addicted to being as weak as a kitten for Bruce. She'd enjoyed it more than she could ever have imagined.

Little did Kara know that her thoughts on addiction weren't far off from what Bruce had in mind for her…

-x-X-x-

Needless to say, Bruce rapidly turns that 'bit of roleplay' into the new normal. He even gets Kara a stylish choker that can hold a sliver of Red Kryptonite for her to wear at work. He sells it to her as a way to further distance her 'human' identity from her Kryptonian identity. After all, the loss of her powers makes her more of a natural klutz at work, and no one would think that the klutzy bespectacled Kara Danvers is actually the Kryptonian heroine Supergirl, right?

She takes to it with ease, and honestly, she takes to being his Super Pet with ease as well. At work, she calls him sir, which of course she already did as his secretary. However, as Supergirl and Batman, she'd taken to calling him Master, whenever they were alone. Bruce hadn't even had to suggest that… in the end, it was apparently something she'd come up with all on her own.

Their 'work' lives definitely changed, in the wake of the Kryptonite collar. More and more, their interactions became based in the 'roleplay' of her being his Alien Pet, and him being her Human Master. Bruce had to admit, there was nothing quite as enjoyable as being in the middle of a boring conference call and sliding his hand down into his lap to place it atop the bobbing head of a certain blonde he'd put under his desk.

Kara Danvers spent almost as much time under his desk between her legs as she did at her own desk in the following days, leaving him to always be able to glance down and see a pair of beautiful blue eyes framed by black-rimmed spectacles staring up at him as she happily and greedily bobs up and down his member. Swallowing his cock, slurping and slobbering at his balls… Kara was as ever, eager to please. She wanted nothing more than to make him happy.

And of course, this expanded to their roles with the newly reformed Justice League as well. He'd made Supergirl his second in command as Batman, both to satiate any need for power she might have had, and to keep a close eye on her. He both gave her authority as Supergirl, as well as subordinated her under him, leaving her subordinate in both of her identities, to both of HIS identities.

Needless to say, having Supergirl wearing her full costume and bouncing up and down on his cock in the League command center late at night was certainly enjoyable. Hearing her call him Master as she rode his member while wearing her collar, weak but still clad in her Supergirl persona and so very eager for more, was a treat.

She lowered herself to being nothing more than Batman's cocksleeve on the regular, spending practically every night after debriefing him on the evening's activities riding him or being ridden in turn. Bending her over the League Round table and flipping up that cute skirt of hers to fuck her from behind… yeah, Bruce had to admit, he enjoyed it quite a lot. Not that it was about his enjoyment. At the end of the day, all of it, every last bit of it… was to keep the world safe.

Still, there was no denying that, somewhere along the way, Bruce had come to feel deep and lasting affection for Kara. She was in love with him, of that there was no doubt, and while Bruce wasn't sure he could say the same, he certainly liked her well enough. She was… malleable in a way her cousin had never been. Initially, when Clark was still Clark and had Lois to ground him, that was fine. Superman as he'd been before the destruction of Metropolis could not be swayed, could not be manipulated, could not be changed.

That was all well and good… until the Joker had broken him, and Superman had become a tyrant. Then, that intractability and all around stubbornness became monstrous in nature, and Bruce had known from the start that there was no talking to Clark, that there was no reasoning with him.

Kara was different though. Kara was… special. Young and impressionable, he'd taken her under his wing and brought them both closer together. And now the blonde looked to him for every important decision, she bowed to his knowledge in any situation where her own was lacking, and she accepted his commands, both in the bedroom and out, without hesitation and with an eagerness and enthusiasm that pleased him as much as it relieved him.

That all said, Bruce couldn't stop at just a half-measure. He had to do more… he had to finish what he'd started. And so, clad in the cowl of Batman, fucking Supergirl over the League round table one night, he grunts and reaches out to grab hold of her blonde hair, pulling her head up even as he rams into her.

"Supergirl."

"Y-Yes Master?"

"I'm tired of pretending this isn't what we both want full time. I'm tired of acting like you aren't my horny little slut, even outside of this… roleplay. It's time to make things official."

A shudder runs through Supergirl at that, and she twists her head to look at him, blinking owlishly. The Kryptonite collar is currently around her neck, keeping her weak and sensitive so he can properly fuck her silly.

"I… w-what do you mean?"

With a growl, Batman speaks in his normal deep baritone, even as he slows his fucking of her clenching quim to a standstill.

"Be mine. Swear yourself to me as my pet, my property… my slave. I want to own you; I want to control you in every way. Give yourself to me entirely, right here and now… or we're through."

He doesn't really mean it, or at least, Batman has managed to convince himself that he doesn't. He doesn't actually want a sex slave (except he does, so long as its Kara), he would never willingly debase a human being by forcing them into such a role (except Kara isn't human, now is she?), and he really doesn't want to own ANYONE (but that's not entirely true anymore, now is it?).

And yet, he doesn't see another way to finalize things with Kara. He needs her subservient to him, he needs her obedient and loyal. He needs to know she will never betray him (like her cousin did, like his SON did). He needs that, and this is the only way he sees to get it… or so he tells himself.

Shivering, Kara hesitates for a moment, but that hesitation turns out to only be some initial shock. As soon as she recovers, she looks him right in the eye… and nods her head.

"Y-Yes. Yes, I'll be yours. I'll be your property, Master. I'll be your s-slave…"

With a lust-filled growl, Batman goes back to fucking her, pounding Supergirl into the Justice League table with all his might. This was the same table that the original Justice League had been officially formed around. It was the table that they'd planned out their missions around, that they'd used to tell each other of the important things going on in the world.

Some might say that he was defiling it and Clark's memory by enslaving and fucking the man's cousin atop it. But Superman had ruined all of that himself a long time ago. Batman was just the only one left to pick up the pieces and hold everything together the only way he knew how.

Finally, with a hoarse shout that's accompanied by an orgasmic squeal from Supergirl, he finishes inside of her, not bothering to pull out or go anywhere else this time. He creampies Kara's womb, too caught up in the moment and damning the consequences. He fills her and fills her, and then once he's done, he pulls out and removes her current Kryptonite collar.

He doesn't give his new Sex Pet a chance to recognize or acknowledge that fact before he's putting another one on her, a specially made collar. Pulling her to her feet and back against his chest, Batman turns Supergirl to the nearest reflective surface, letting her see her new collar with the name 'Superslut' emblazoned on the outside.

Meanwhile, on the inside, he's allowed himself just a little… greed. Emblazoned on the inside of the collar, resting against her throat, are the words 'Property of Batman'.

"You will always have this on when we're in private, do you understand me? You belong to me now, even if we can't tell anyone."

"Y-Yes sir… I understand, Master."

-x-X-x-

There's a knock at his door, so Bruce calls out.

"Come in."

The door opens… and Kara walks in to his office. But not as Kara, and not really as Supergirl either. Instead, she's dressed as 'Superslut', his own personal fuck toy and love slave. The modified version of the Supergirl outfit leaves her tits out, having completely removed the big S that had apparently stood for hope… until her cousin had tainted the symbol's meaning. Meanwhile, her red skirt is barely a microskirt at this point, and more of a belt, showing hints of her dripping wet pussy lips with every step she takes towards his desk.

And finally, completing the entire ensemble is the collar around her neck, with the words 'Superslut' emblazoned on the outside. Only the two of them know that 'Property of Batman' is emblazoned on the inside of the collar, always brushing up against her throat.

Raising an eyebrow at his well-trained Super-Pet, Bruce waits… and isn't disappointed.

"No need to worry, Master. No one saw me, I made sure of it."

"And how did you do that without your speed, you hopeless slut?"

Shivering in arousal at his degenerating words, Kara licks her ruby red lips.

"It was dangerous… scary, even. But I came in today as Kara, wearing a coat over this. And then once I was at my desk…"

She leaves the rest unsaid, and Bruce sighs, chuckling as he shakes his head and rises from his chair. Circling around his desk, he reaches out almost casually and grabs his Superslut by her hair, yanking her down and bending her over the nearest chair without any difficulty. Not only does Kara move with him, but she also doesn't really need to… like this, they both know he's stronger than her.

Kneeling in the chair, bent over the back of it, Kara wiggles her exposed, bare butt in his direction, mewling like the lusty little kitten he's trained her to be. Instead of fucking her right away, Bruce brings his other hand down on said exposed ass and delivers a harsh spanking to her.

SMACK!

"What are you?"

"I'm your Superslut, s-sir!"

SMACK!

"You belong to me, do you?"

"Y-Yes Master! This worthless Superslut belongs to you!"

SMACK!

"You're hopeless, aren't you?"

"U-Utterly, Master! I need it! I need your big fat c-cock to discipline me and put me in my place!"

SMACK!

One final spanking, and then he yanks Kara back out of the chair… and promptly sits down in it himself while forcing her to her knees.

"Earn it then, Superslut."

"Gladly, Master~"

Breathless and excited, Kara happily extracts his cock from his pants and then wraps her naked tits around his dick while bending forward to suck the tip of his member in between her lips. Bruce lounges back, his fingers sliding through her blonde locks as he groans in enjoyment of her tongue and tits on his cock. His plan to turn Earth's last Kryptonian into a subservient loyal pet, to keep her from ever betraying him like her cousin did… has gone off without a hitch.

The Last Daughter of Krypton has accepted her place as the Caped Crusader's Love Slave wholeheartedly.

-x-X-x-

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