(There is nsfw writing at the end; I will flag it so those who don't like it can skip to the next chapter)

Recanting bit by bit Kathryn explained to the very first set of mewman ears ever the intricacies that laid out before her banishment. Star holy heartedly was a very good listener.

"You fought....but for the monster," Star digested that part somehow harder than the idea of falling in love with a non mewman. She did take it in stride and aimed for the best bypartisan stance she could, "Ransacking a few homes and mischief doesn't get one banished though. To send you to earth for that is way overkill, I mean my mom can't let that-"

"Toffee killed the thirty seventh Queen of Mewni-" Kathryn confided very abruptly. The generalization of murder hit the teenager but it was the slow count down from numbers that Kathryn slowly watched the recoil of her words sink into the girl.

"...that means..."

"Your grandmother Star," Ashamed of it more now than the actual time of the act, Kathryn averted her eyes down on the jacket she had been worrying, "...it was...not something I cared for..."

"But mom....and grandma went to live on a grandma farm, like all grandma's," Never had she'd known her maternal grandmother but a mixture of the lie her mother told her all fourteen years and hearing it so suddenly was a little chaotic for the girl. Holding onto the hem of her skirt for some sense of stability as it sunk in, Star knew she was still here to take the high road and prove all facts not just the ones that clearly made Kathryn look bad, "....did you kill her? Did my grandma die by your hands, or-"

Heart wrenching to look at Star, Kathryn was slowly starting to believe in just her own justification to rot in this cell or be tossed away to earth like some useless trash. Shoulders raising with the big swollen breath Kathryn ran her thumb along the seam of the tailored jacket, "Sometimes in war...you forget about the big things to celebrate the small selfish victories..."

Flashback

Thrilled clacking of teeth, claws and anything sharp on a monster's body could be heard like a low rustle on the darkest side of the Mewman's humongous castle. Three days before the break out of the woods and planting monster headquarters right in the median of mewni to monster territory caused quite the stir in moral as well as mewni discontent. Big brutes of all species set up as sentries scaring off any humane outreaching of the pathetic Butterfly counsel. Such restlessness on the vanguard of monsters made literally sneaking in the back far too close to child's play.

Kathryn sown in the only place she'd been since adopting the monster's fight, right at Toffee's side no matter the time of day. Cast in the shadow of the Butterfly castle the small bevy of attentive monsters stopped before the large brick wall meant to keep riffraff out.

"Pathetic," Rasticore, interestingly one of the only other septarians Kathryn seemed to find in the monster army, snorted at the shameful excuse for defense. His presumptuous nature over the commanders mewman had landed him a bit in unfavorable light. Kathryn a little more naive to forgive the alligator being but was strictly forbidden to even engage any monster, especially Rasticore, without Toffee present.

"How many," Toffee inquired towards the single avarius in the group.

Lanky, beaky and gangly, the bird being was good for recon but not much else. They clicked their beaks and counted on long feathered fingers, "Two on the south eastern end and only one coming from the west. The rest, are guarding the front."

"Good," Just as favorable as the clear night sky, Toffee was assured but not about to use his little secret, "Kathryn." The lone mewman looked up from her dazed look over the twinkling city, "Our plans."

"Yes," She nodded, aware of her job to provide the cover for the troup. Out in the field Toffee restrained from showing her much more than what he did of all his troops.

Under the collar though he promised far more than a successful mission if she did her part. Though it was clear to everyone now as he'd dawned her in matching armor to compliment his own. Deep, dark wine colored bodice lined on the collar with bright red and a matching sash, Kathryn adorn with the spiked knee braces and all. Except, the clearly mewman skull pauldrons Toffee worn with prowess. Some seeing the power indulgence of a monster with a mewman wrapped around their finger. Others more so disgusted in the disgrace. None of them brave enough to confront the general.

"Come on tiny one," Rasticore mumbled, he knew his job was to through her up high enough the fellow avarius could catch her and get her up the last seven feet he couldn't clear.

Taut about the entire plan Kathryn didn't move even as the large lizard crotched down for her to step into his laced fingers for the boost up. Seized in a bit of the moment Toffee whisked away his soldiers concern over the mewman blowing it. Stepping in front of Kathryn he tipped her face up with the telltale thumb brushing along her bottom lip.

Holding her worried gaze for a moment Toffee pressed his thumb against her lips and smiled briefly under his focused facade,"For all the injustice in the world, us meeting wasn't one of them."

Renewed with the idea of what she was doing was right, Kathryn gathered her senses and stepped foot in the opposite septarian's vault up. On que Rasticore thrusted her much tinier body up as hard as he could. Free falling only a moment before the sharp notice of the bird's talons linked into the armor's shoulders. Mewman and avarius swallowed up in the dark night sky off to her ploy in all this. Toffee stuck staring up at the faded shadow she'd become in the sky.

"Really? A speech," Brave or dumb, Rasticore was the only one of the monster gang to point out the doltish slander out of Toffee's mouth, "There's hundreds more of them."

"Hmm," Toffee didn't lash out at his subordinates regaling. Instead staying locked up at the castle wall awaiting the signal, "True...but she's too useful not to keep under close wraps."

Kathryn had rehearsed the throw over a dozen times. Something about it being in an empty field verse into the talons of a giant bird was far more nerve fraying than practice. What was a very short flight at least as one flap and they were gliding towards the dark shadow of a guard tower.

"We part ways here miss," kind and gentle Kathryn found most of the monsters of Toffee's army were no less articulate and thoughtful than the mewmans she grew up with. A tuck and roll when they released her from their talons, Kathryn bounced up with more vigor than expected.

"Thank you," She mouthed in the dull light. Not even sure her comrade saw or understood. Regardless Kathryn slinked back towards the cold brick exterior and surveyed what she'd gotten herself into.

Just as reported there was only two stationary guards. With a third passing every once in a while and sometimes as far as Kathryn could see he wouldn't even come all the way down each round. Giving it more of a two to one offensive if she acted quick enough. Beneath the wall they stood on the mewman guards oblivious to the monsters below.

"Ok...you can do this...they're both smaller than everyone at camp..." Best of a pep talk she could muster, Kathryn knew she didn't have the leader spirit like Toffee did but tried her best as it was an army of herself, "...for him."

Sent off with conviction, Kathryn didn't let her mind think. Only her body react. Jeweled knives drawn there wasn't time for the first guard to react to the stabbing pain shoved up into his thoracic cavity. The faint gurgle of blood between his lips as his chest swelled with blood. Only the thud of the body tipping off the second guard to the imminent danger. All for nothing though as Kathryn through all of her body weight into her right hooking fist. Knocking the guard off his feet and right over the brick wall. His screams only audible for mere seconds before a juicy splatter took its place. Leading to a miscount on the third guard. Kathryn whipped around to see the third sentry either reaching for his weapon or about to turn tails and run. Not accounted for but the berserking bloodlust she'd whipped herself into was mania

No survivors.

Kathryn snatched the sword from the dead body and chucked it so hard there was no chance it wouldn't strike something. It certainly did when the sharp blade poked out of the fancy breastplate of the fleeing guard. Like in stasis the weapon lodged in their chest cavity peaked past the metal armor. A trembling touch reaching up to the blood dipped weapon but they couldn't even raise their hand to it before crumpling to the ground. Ragged deep breathes, Kathryn retracted from the distorted shape she through the sword in. Standing back up straight to come down from the blood frenzy it took a moment before the objective of her killing re-entered her mind.

Quick to reverse back to the ledge she made it over. Kathryn peeked her blood splattered face over the cobblestone barricade. Feeling a little silly staring down at the gang of monsters waiting for her signal. But they got it though when her eyes met with Toffee's and Kathryn waved down at them.

"Quick kill," one of the male feline band members gave kudos to the tiny mewman that had done as she was told in less than five minutes. The dead body at their feet a testament to the woman's intent as none of Toffee's men could discount Kathryn's darker side.

"Go, we have limited time," Toffee ushered the band to stop ogling the handiwork of the mewman and to do as they were told.

Everyone on the same page lurched themselves up the newly freed brick wall. No chance to be seen everyone scaled to the brick with natural affinity. Kathryn stepped back as each one lugged their body over the edge and back onto a flat surface. Falling in single file they stepped back into the castles shadows awaiting Toffee's arrival.

Coming up last just to make sure no stragglers jeopardized the mission, Toffee pushed off the ledge and wiped his hands on the dark hide of his pants. Everyone did wait expectantly for his next order but Toffee took a moment to look over at the blood stained mewman standing beside him like an obedient dog, "Good job." His slight bit of praise accompanied with his thumb smudging the blood on her right cheek. As fast as that came he turned to the rest of the party, "Move quickly and stay silent. Remember, when we reach the room, the target is mine."

Just as anticipated the slight of hand trek deep within Mewni's castle was far managale than most the monsters had thought. Most worried they'd die on the futile mission and why only a handful of fools agreed to accompany their leader and his pet. Buried down the grandest of halls and further into the castle than any monster had been. Toffee's warband met with little resistance he was not prepared for. Each monster filling a niche they needed to make it into where Toffee intended to be.

The Queen's quarters.

More than a dozen unconscious or rightfully dead mewman bodies laid strewn leading up to the closed chamber door. A deafening crack as Rasticore snapped the already limp neck of a guard.

"What," He found all eyes on him after the loud echo, "I was making sure."

Toffee exhaled slowly through his nostrils and shook his head at the unpredictability working with others still brought. Kathryn on the other hand. Performing ideally down to every last action and reaction she had breaking into the royal keep.

Toffee turned around to look on at his soldiers and down at the mewman beside him, "Kathryn with me. The rest of you," Toffee made sure to make eye contact with every last set of eyes on his monsters, "Leave, now."

Urgent concerns that what was behind the Queen of Mewni's door was more than even their methodic leader could anticipate, "General but what if-"

"That is an order," Toffee did not allow the spur of the moment righteousness to loiter, "Leave."

Difficult grumbles and disdain for the order was fulfilled but not with vigor like breaking in had. Each one of them darting off and spreading out to escape the clearing in the castle. A moment alone Toffee looked down at the mewman who did not question staying by his side.

"My dear," His silken deep voice dropped back to the hypnotic tone she drowned it. Kathryn looked up at him. Both of their bodice armor and leather trousers splattered with assorted blood stains. The fraying tips of his normally kempt hair curling out from the perfect slicked back matter he normally wore. She no better as the sweat and blood frizzed her curls ever so slightly.

Amidst even the tipping point of Mewni and monster lives, Kathryn couldn't help the self assured side quip, "You owe me more than just being the big bad monster in the woods after this."

Even if he wanted to fight it, she succeeded in making the corners of his mouth curl up in a petty smirk for the woman's words.

Kathryn proceeded forward swinging open the chamber doors letting herself in a grand entrance, "My Queen! My Queen!"

Baffled for what was a woman holding a particularly ordain rolling pin like a wand, stood shocked when a fellow mewman came hailing into the room, "Oh my! A girl?! Child what are you doing?!" Lowering her weapon the Queen rushed towards the frantic girl heading into her chambers, "Are you hurt?! Are you-"

Nothing would ever mask the expression of a woman's face as the life drained from her. Kathryn stopped just out of arm's reach and watched. Not in horror or sadness. In placid nothingness as Queen Comet's eyes glassed over, her grip on her wand fluttered before it fell from her hand. Losing the form it was and turning into a circular stick with nothing special about it as it rolled to Kathryn's feet. Those adorable butterflies on the Queen's cheek that only moments before glittered with magic, slowly faded. Lilac in color until they drained to a dark black. From her chest peaked the blood coated tip of Toffee's dagger. Precisely where it was meant to be.

What little energy the dying woman had was used to turn her head to the horror behind her. Taken down by a monster in cahoots with a mewman. Tears welling in the foolish woman's eyes, "B-But...my, my daughter-" All the breath she had in her as the Queen buckled down with a gentle collapse to the marble floor between the mewman she faced and the septarian behind her. Dagger lodged in her back Kathryn stared at the jeweled handle she knew too well, and when she saw Toffee staring back at her just behind the collapsed Queen knew he'd done just as planned.

Before them the dead Queen of Mewni pooling in her own blood. Just as the crimson liquid was about to touch her boot, Kathryn and Toffee were alerted to the sound of guards stomping through the halls directly towards them. Somehow entrenched in her body staring at the dead Queen at her feet, Toffee reacted for both of them. He nabbed Kathryn by the arm and pulled her to his chest. Tail looping around her torso and her body at least mindful enough for the mewman to through her arms around his chest, Toffee darted out of only light cascading into the room. They were out a window and down the into the royal gardens running on foot before the guard's could be heard screaming and laminating over finding the body of their dead Queen.

The elation from her last kill lagged, Kathryn felt an almost overwhelming nothing ness as her and Toffee escaped into the backdrop of the Mewni night. Until the torches and lanterns of the monster army could be seen. Like what they just did really settled in. Kathryn achieving something she didn't think she could. It hit her like a warnicorn she burst into sadistic self pleased laughter.

NSWF Addon (DO NOT read if you don't like)

Her and Toffee heaving deep winded breathes as they burst into the commanding tent from the none stop rush back to camp. Canvas flaps fluttering shut in the middle of the night air when the returned into the tent. Kathryn a laughing mad man not fathoming what she just aiding in doing, "I-?! We?! Just pulled it off, Toffee we-!?"

Immediately Toffee leveraged her close to him with his tail and mashed his scaly mouth into hers. Undoubtedly even the normally collected septarian's heart beat rapidly in his chest as Kathryn raised her hands flush against his body. Crazed thumping in their chest as their hearts wanted to burst from their rib cages. Unhinged both mewman and septarian running on pure euphoric adrenaline tearing into one another like heathens.

Unrelenting Toffee hooked his claws into the neck of her armor and tore it right down to the front of chain link bodice. Allowing it to fall with a thud on the ground and he didn't eve ask before gnashing his teeth down into her shoulder. Pain mixing with pleasure as the smaller mewman did her bodily best to grind up against him in the frenzy. Nowhere near being able to tear away the mesh chain link, she did the next best thing slipping her small mewman hands up under and against his scaly muscles.

More than happy to earn a throaty growl from the lizard as her touch pleased him, making it even worth it as his teeth sunk deeper into her. Not even caring if he did draw blood, there wasn't enough going anyplace but her loins that mattered. Toffee pushed himself between her legs. Savoring the way her hips rocked pathetically on his thigh. Beaded up under his teeth blood from the woman dribbled down her chest when he unhinged his jaw. Down it rolled between her breasts. Toffee's yellow eyes mesmerized until his maw parted and he washed his inhuman tongue between them on the soft mewman skin.

Licking the line of blood mixed with sweat, achingly slow, from between Kathryn's breasts following the delicious line of blood all the way back to his teeth marks. Primal groaning from beneath him as his tongue made contact with the bite wound. Interested in the relation of her hips grinding harder each time Toffee teased even the littlest bit of pain.

Done with the pestilence of standing Toffee untightened his tail from around her waist and pushed her down onto the neatly unused cot. Little time he did spend sleeping never included the mewman in his direct space. But with bursting adrenaline filling both of them Toffee wasn't above giving into the more monster side of his desires.

Kathryn yelped a little when she was thrown to the cot. Not out of pain but pure surprise for being thrown like a rag doll with no weight to her. Toffee's strength and size something she never really considered. Now he was using every inch and muscle advantage he had on the female.

Barely thinking her shoulder didn't even feel like it had been bitten but the trickling sensation of blood down her naked torso was otherworldly. Toffee's tongue intermittently indulging and licking up the crimson rivers only made it harder for Kathryn to keep it together. There was no use for a word when Toffee looked down briefly at the trousers she still had on. Fast to disrobe Kathryn worried the buttons until she was free of her pants. Not wanting to miss the show as Toffee stood above her taking his own moment to peel off the dirty armor. No ounce of shame to gobble up the monsters broad defined chest as his muscles twitched with each movement and the definable bulge in his pants was not hidden anymore the moment he ride himself off the pesky too tight pants.

Toffee crawled on top. A bloodthirsty predator finally getting to do what they wanted with their prey. Kathryn willingness beyond that of a victim, a willing morsel. She looped her hands behind his thick neck and laced finger fingertips up into the septarians dark hair as he bowed his face down to hers. Taking for himself a kiss with the faint of blood but not caring she kissed him back urgently if not in need. Satiated with heavy petting and make out, it wasn't until his cock rubbed against her inner thigh as Toffee grazed her neck did Kathryn have a dead set need that was going to be fulfilled no matter what.

Bucking her hips up against his pelvis Kathryn found a pitiful release for the knot in her stomach. Positioned just right she could grind her cunt along the length of his cock in one fluid motion. Pleasure from the wet folds of his mewman companion slithering her way up and down his shaft but it was watching her defile herself without his instructions that made Toffee lick his lips and watch with narrowed yellow eyes down at her. Kathryn in a world of her own reveling in the twinge of pleasure every time the tip of his cock grazed over her clit and only sent a cascade of shivers over her body.

Lured to the idea of what she might do if her actions got a little carried away, Toffee shifted his hips just enough so one more gyrate of Kathryn's hips and suddenly to her she pushed herself down on the length of his cock. Torn from the passion trance she'd found herself in, Kathryn's eyes shot open unsure of what even just happened. Toffee smirked and lowered his mouth to her ear, as he did so his cock pressed deeper into her even as she'd taken as much of it as bodily possible, his low silky voice came from between scaly lips, "Tiny mewman....trapped by the evil monster~" The sweet fleeting serenade only a moment before Toffee pulled back just enough to tease her entrance before slamming his cock back inside.

Back arching up and nails digging into grey shoulders, Kathryn only let a pleasurable sigh leave her mouth when she melted into the monster. The only invitation he needed before Toffee began fucking his desirable little treasure. Kathryn in place by both his arms on either side of her. She pulled her feet up allowing him to reach angles she didn't even imagined belonged inside her. Distinctly shaped cock unlike that of a mewmans, Toffee's thicker head and ridges only caused the most embarrassing gushes as her juices coated him. The wetter she got the more self indulgent he got.

Propped up on his left hand, the free right hand came to grab a fistful of her hip. Claws sinking into the squishy sides of her fleshy body. The more her jiggly little rolls showed from her position the harder Toffee fucked her. Bite marks on her neck had stopped bleeding only for a mere second as Toffee dropped his hand off her hip and put nearly all his body weight on her. Thrusting a tad bit slower but much deeper as his breath tickled her neck before his telltale need surpassed.

Gnawing down harshly right where he had before. Toffee savoring the taste of her blood flooding into his mouth as pleasure rippled through his own body. Kathryn shrill gasp in pleasure was a pathetic mix of her voice cracking and panting trying to retain herself. But even Toffee could feel the tightening around his girth was not meant to last long.

In a shock, laying pretty content on her back just to be fucked, Kathryn was sudden wooshed in broad arms and before she knew it was on top instead of bottom. Shifting her legs into a better straddling position only meant she sunk down further on his cock. Moaning lowly goosebumps pricked all over her skin feeling the tip of Toffee's cock meet her deepest parts. The twitching muscles of her cunt on overload. Bringing her back down was the gentle hand against her cheek. Kathryn followed the arm down to meet those reptilian eyes. Toffee gorging himself of the sight. Mewman upon him, feeble and at his whim. Those trickles of blood beading off the teeth marks he'd reopened. The thumb on her lips pressed into her barely parted lips. Obliged Kathryn didn't even think of it as she took his thumb into her mouth and sucked the iron taste of blood on it. Not faltering eye contact his hips began to move up and she got the rhythm.

A slow rock forward and back on his cock. Face held down to look at Toffee as she nursed on his thumb. Doing the best to muffle the moans escaping past her as the humping became more frantic fucking. It didn't take long before the constricting feeling of her building orgasm was coming right back to a head. Wanting to shut her eyes and ride it out, Kathryn found Toffee refused to allow her look anywhere else but down at him.

Embarrassed and exhilarated at the same time. Kathryn muffled noises as she quivered and felt it coming like a train wreck. Toffee pulling her face to look directly at him as she rode onto both their orgasms. Unsure she was even able to climax a little shy. A moment more and Toffee bucked his hips up with the dirtiest smirk faint on his mouth. Right over the edge as she seized on him and Toffee's cock twitched in time with the orgasmic waves of muscles wracking her cunt. Noises blurring out to nothing and only this piercing yellow eyes the only anchor she had as her orgasm stole every bit of energy and the warm feeling sensation of his cum dribbling out around his cock.

No one moved. Toffee took his thumb from between her lips and let it set tenderly on her pouty bottom lip. Still in a bit of ecstasy Kathryn felt her hands up up his chest steadily. Every bump and groove of Toffee's chest as she found her body following suit with her hands. Leaning down into him with every last ounce of energy gone from her bones. Toffee no hurry to move either he quite enjoyed the soft petting of her hands and allowed her to come to rest on his chest.

Ear pressed to his apex Kathryn remained on top and Toffee inside. While both of her hands were reached up and swirled around in his hair, Toffee laid only his right hand over her back. Fingertips at the nape of her neck just so he could wrap one dirty blonde curl around his index finger. Kathryn in her own little world nearly passed out on top of the larger septarian. For all that had gone right, Toffee allowed himself a long slow exhale. She only sunk in closer and the feeling of her warmth around and on top was allowed for the victory. A deep rumble against her ear as his words filled the silent night air, "...Mewni's finest, and you belong here, with me my dear."