Mariposa and Meteora were spending the night over at Marco's home. It was, for the most part, a night just like any other. The girls had always been welcome in the man's house, where they seemed to spend more time than their own.

"Alright, so no funny business tonight. Got it?" Mariposa glared at her hybrid sister while the two made themselves comfortable on Marco's couch.

Meteora looked Mariposa dead in the eyes, "There's a reason my mother made my middle name Danger!"

The latina rolled her eyes, "Is it too much to ask you to keep it in your pants tonight?"

Meteora lowered her tube top to show off her "girls" while hiking up her thin, tight shorts, "You know I can't promise that. C'mon, would it really be so bad if me and Marco actually got together?"

"Legally? Yes. Morally? Even more, yes! Marco raised us since we were babies! Don't you think it's a little wrong to put so much pressure on him like this?" Mariposa waved her hand over Meteora's outfit and makeup.

"Hey, Mom and Aunt Star are cool with this. So what's your deal?" The two girls gazed daggers at one another.

"Oh, I dunno. Maybe because he's still with Auntie Star. Or it could be that I'm sick and tired of you, a fifteen year old, trying to put the moves on a man who's a bit over thirty. For crying out loud, you call him Daddy sometimes! They're only cool with it because they don't take this as seriously as they should."

Meteora giggled at the accusation, "Aww, is someone jealous that I'm taking their big brother away? Just like Auntie Star did?"

"Ugh, there's no reasoning with you! And just what do you think will happen to his marriage with Auntie Star? What is she gonna say when she gets back from her parents' place? Have you ever thought about that part?"

"Of course! I get to be his mistress and you and I will really become sisters! Oh, we'll bang sooo much all over this house!" The tips of her fangs peeked from beneath her sinister smile.

"Is that what you want? Just to use him for sex when Auntie Star isn't around?" Mariposa pointed accusingly.

"Why in the world would you even say something like that? You know I love him as much or even more than you! And I see the way you look at him. You know as much as I do that no other guy will ever compare to him!"

"That… we're- I'm not going to talk about Marco like that! He's my brother, you sicko!"

"You say that, but I've seen the way you look at him when he's not wearing a shirt." Meteora mocked as her eyebrows hopped suggestively.

She shot up to her feet from the couch with her face beet red, "Y'know what? I'm gonna go check on Marco!"

Meteora winked and smacked her on the rear, "I'll be here and tell Marco I'll be waiting for him with my legs wide open!"

Mariposa placed a hand over the sore area, "Ugh… you're a freak!"

As she walked out of the living room and into the kitchen, she heard Meteora singing, "But you love meeee!"

Marco was putting the last touches on his Super Awesome Nachos as his little sister walked in. He looked at his sister with a raised brow.

"The heck are you two having a screaming match over this time?"

The younger Diaz laid her rear on the counter next to Marco, "You know how she is. She's so frustrating when we talk about you."

"Try not to hold it against her. It's just a phase." Marco licks his fingertips and pulls off his apron.

"You say that, but she's really gunning for you tonight. Watch your ass, big bro." When Mariposa reached for one of the chips, Marco instantly slapped her hand. His sister quickly withdrew her stinging hand.

"Young lady, you know the rules. We all eat together as a family. You can wait a little longer."

"Ouch! You don't need to be so mean about it!" Her face was dark red, being scolded by Marco. She couldn't help but bite her lip at her older brother's reprimanding.

"Yeah, yeah go get the drinks. I'll see you in the living room." Marco picked up two large plates before making his way into said living room.

Mariposa couldn't hold back the need to check out his rear. Marco was tall and built like an athlete standing at a bit over six feet. Being a part-time karate instructor, the man kept his body in tip-top shape. Mariposa always liked his home attire, which consisted of well broken-in sweatpants and a tight white t-shirt.

"Nice…" She remarked to herself with hooded eyes.

She shook her head vigorously, trying to get the naughty thoughts out of her mind, "Down girl! Remember, that's your older brother. That's tall, handsome, covered in muscles and hot when he's shirtle- Oh God, I'm a perv just like her!"

"What took you so long? I've been waiting here like a good girl for you to feed!" Meteora watched as Marco leaned over and placed the plates on the coffee table.

He looked down at her once standing back up, "Making my nachos is an art, you don't rush it. Don't be a brat or I'll have to punish you."

Meteora grinned as she rotated her body on the couch with her knees in the cushions and rear in the air. Her tail swayed side to side as if to tantalize the object of her affections. "Oh, Daddy! I've been a very, very bad girl! You should teach me a lesson and put me in my place!"

Marco covered his face with his palm, "Ugh, this kid I swear…"

The hybrid rocked her hips to show off her growing ass, as she was about to make another sexy comment, "Put that small thing away, my butt is way bigger!" Mariposa snapped as she walked over beside her sister and placed the drinks on the table. While still bent over, she bumped her hip into Meteora and the girl was rightly toppled over.

"Hey! Watch it with that thing! Mine is still growing. Anyways. Marco is a boobs man!" Meteora was laying on her back now as she puffed out her chest and squeezed her budding, yet sizable tits together.

Marco was more than familiar with this kind of talk between the girls, but could never find himself completely comfortable with it. "Uh, girls? Can we not have this conversation during movie night?"

That didn't go well with the hybrid as she stood on the couch and tried to get in his face. It didn't work with Marco being a foot taller than her still, but that didn't stop her from digging one of her claws into his chest, "Oh, yeah? Well… if I wanna keep it going? What are ya gonna do then?"

Marco merely raised an eyebrow at the young hybrid before placing a hand on each of her shoulders.

The simple contact shouldn't have done anything, but the moment Marco's strong hands gripped her flesh, Meteora's nerves came alive. Her tail swished behind her, gently and erratically.

She was pushed with her ass onto the cushions. The teen pouted and crossed her arms as Marco grabbed the remote and booted their movie streaming service. He dropped his whole body weight onto the couch with the girls at each side.

As he scrolled through the menu, Meteora got the bright idea of sitting on her would-be lover's lap. She stretched her limbs out, yawned like a kitten, and reclined against Marco's chest. The older man briefly looked down and shrugged, as such an act was commonplace among the girls.

Mariposa met eyes with her horny best friend for a moment, both glaring at one another with partly open eyes that spoke different messages. While Meteora's was smug and sly, Mari's was suspicious and annoyed.

From there it was a completely normal movie night. The three had their fill of nachos while they went through some cheesy horror movie trilogy, consisting of some extended narrative about a guy wearing a burlap sack on his head killing people with a shovel and burying them.

About a quarter of the way through the third movie, Marco and Meteora had their attention grabbed by faint snoring coming from the other end of the couch. Mariposa had her head on a pillow, drool streaming off her lip and her eyes shut.

"Aww. She fell asleep again." Marco pointed out, smiling. "Looks like it's just you and me tonight, Meteora."

"Mmm, yeah it is." The girl purred dreamily. Her tongue dragged across her lip at the possibilities opened up to her.

While Marco kept his eyes glued to the TV screen, Meteora kept hers low and half-lidded, focused on the prize she sat on. She rolled her hips back and forth to get the reaction she wanted.

The increasing friction crept into Marco's attention and the pressure pushing onto his lap manifested into a slowly pitching tent in his pants. He looked down at the girl, wide eyed and gasping.

"Meteora!" He whispered loudly. His eyes darted to Mariposa. "The heck are you doing?"

"Mmm, what's it look like I'm doing?" Meteora continued her insistent grinding unabated. Her smile widened as she felt the fruits of her labor blossom and poke her rear.

"Does it hafta be here? Now?" Marco asked.

"Please. I've been dyin' for it aaall daaayyy." The young hybrid purred as she began digging her claws into Marco's legs for leverage.

"Can't it just wait till like… after the movie?"

"But I want it nowww!" She whined, giving the object of her affections her pouty lips and sad eyes.

Marco always found that face hard to resist, and nine times out of ten, he found himself conceding to it. But this night he was extra resistant considering they were literally within waking range from his sister.

"Meteora… Mariposa doesn't know about us yet! Nobody does!"

"Mmm, maybe it's the best time for her and everyone else to find out."

Meteora hopped gently in place, feeling the bulge beneath her tap the center of her concealed ass.

"C-can we at least take it to the room?" Marco's breath hit Meteora's pointed ears, sending a chill that sent her smaller body shivering.

"Like I said, Marco. I want it now." Meteora reached between her legs to grab the treasure she desired hidden beneath thick cloth.

"And I think you do too."

"There's no talking you out of this, huh?"

"Nope."

Marco looked towards Mariposa once more. She laid on her side in a near fetal position. Her chest gently rose and fell as she breathed softly.

The older man sighed in resignation. It seemed there was no way out of this one. The girl had him bound like a mouse to a glue trap. Wouldn't have been the first time, but he could never find a good way out whenever it happened.

Meteora laid back onto Marco's chest as his hands held her hips in place. He whispered hotly into her ear.

"Then you better keep your voice down."

Meteroa grinned as the male brushed his five o'clock shadow along her soft neck. His hot breath and scratchy face ran along her smooth, pale skin making her nethers tingle and her tits stiffen.

"Oh Daddy… you know I love when you do that!" Meteora softly purred.

Marco's hands made their way under her tube top and cupped the young girl's developing C cup breasts. His fingers instantly latched onto her erect nipples, pinching and pulling slightly.

"I know you do, I know everything there is to know about you."

"I know that Daddy, and I know you like this…" Meteora nearly tore his pants off to fish out Marco's massive cock. It sprung out and smacked her wanting pussy, making her squeal.

"Hmmmm? Didn't wear any underwear today?" The man asked, feeling her juices already leaking onto his lap.

"Of course not. How else can I give you easy access and save us time?"

"Mmm, well aren't you a real go-getter?" Marco praised as he nibbled on the tip of her ear.

"Ohhhhh gosh… keep doing that, Daddy! I told you, I've been waiting all day for this!" She wrapped her tail around his cock and slapped it onto her pussy some more. The tip of her tail flicked at his head, drawing a bit of pre-cum.

Marco grinned as she squirmed under his grip, "That's a good girl..."

They continued their little fun as the movie rolled on, every so often checking up on their sister, who remained sound asleep.

With her tail completely wrapped around the base of Marco's cock, she gradually lowered herself, her soaking snatch slowly swallowing every thick, veiny inch of his man meat.

Marco grunted through his teeth and his fingers squeezed his partner's hips much more tightly as he bottomed out inside her.

"You like that tight little pussy, Daddy?" Meteora looked up and over her shoulder at her human chair, who squirmed a little bit as he tried to adjust to their new position.

"I can make it even tighter if you want. I am a size shifter after aaallll." The young hybrid sang out. Her tongue childishly stuck out between her sharp toothed smile as she gave Marco a sly wink.

"Uhh, no that's. That's fine." Marco gulped as his eyes darted towards his sleeping sister once more. "Let's just make this quick."

Meteora giggled behind her palm. "No promiseeess…"

With her Daddy's help, she raised herself up, her moist muff sliding up his pole partway up before gently falling back down, but not quite onto the base.

They tried to be as quiet as possible as they kept a moderate pace. While there wasn't a loud slapping of flesh, Meteora's moist stroking was still audible.

Marco tried to slow things down a bit to mitigate the noise, but his spunky little partner wouldn't have it. Every so often, the younger girl would stop just short of landing back on her lover's lap, and on occasion even succeeded in doing so.

"C'mon Daddy…" Meteora, with her arm wrapped around Marco's head, whispered in his ear between breaths. "...why... aren't you go-going faster, huh?"

"You-y'know already why!" Marco sharply yet softly, keeping a furtive glance towards Mariposa.

"Aww, but I want her to wake up." Meteora picked up speed slightly. "I want your little sister to see her stud of a brother fill this slutty young pussy up."

Unbeknownst to the two, Mari stirred. Eyes rapidly fluttered till they completely opened.

When her murky vision cleared, she was greeted by the sight of Meteora, stripped of her shorts, hovering above her older brother, whose pants were pulled to his knees and his cock sucked into her sister's waiting snatch.

As Meteora gripped Marco by the base, she met the wide, shocked gaze of Mariposa who remained frozen on the other side of the couch.

Meteora blinked, frozen in place as she found herself caught. Though part of her longed for it, she was surprised at how quickly it happened. She was even more surprised by how quiet Mari was, all things considered. With a toothy smile followed by a wink, Meteora sunk the entirety of Marco's length into her in an instant. Her gaze shifted immediately towards the ceiling as she fought back a moan she'd been waiting to let out.

Before Meteora could even think of letting that happen, Marco plugged her mouth with his palm and brought a finger to his lips.

"Shhh! Not so loud!"

Meteora rolled her eyes. She smiled from behind Marco's palm, acutely aware of Mariposa being awake unbeknownst to her partner.

While the larger Marco held the smaller Meteora in place, he thrusted up into her in an agonizingly slow pace. There was a lack of power in his movements that the horny hybrid just couldn't tolerate.

"Meteora, what the f-"

Summoning enough strength to overpower her bulkier lover's own, Meteora freed herself from Marco's grip before pinning him beneath her monstrous hands, her hips taking over the work while she rode him cowgirl style. She raised herself high enough for Marco's entire length, lathered in her juices, to be put on display for their unwilling audience.

"A-are you nuts?" Marco quietly cried out as frantic eyes looked up at his suddenly dominant younger partner.

"Yup. You already know."

Meteora looked over her shoulder, meeting face to face with her sister once more. Her jaw went slightly agape at the sight of Mariposa's face scrunched up and strained while a busy hand buried itself beneath her pajama shorts.

With a nod, Meteora fully understood what she needed to do, and the glint on her determined eyes told Mariposa all of her debaucherous intentions.

One loud clap burst through the air as Meteora slammed down on Marco's bare hips. That punch to her cervix was exactly what she needed to push her off the edge and into the sexual abyss. Over and over, Meteora hopped roughly on her lover's lap like a rabbit in heat, her pace rapidly picking up in spite of Marco's resistance. And even then, he rapidly grew powerless to Meteora's pussy gripping him ever tighter with each passing second.

Eventually the pleasure caught up to Marco and he found himself forgetting about the "sleeping Mariposa" entirely. His hips decided to act on their own accord, trapped in Meteora's ravenous rhythm.

During their sex-hungry romp, the two found themselves flipped into opposite positions, with Marco laying into Meteora in a mating press. Every time his hips rose, Meteora could see Mariposa's hand futilely trying to keep up with their pace.

Meteora's tail snaked around Marco's waist before wrapping tightly against him to propagate his thrusts. Her heels dug into his lower back to pile onto this support while her claws dug into his shoulders. She had essentially left Marco little to no window of escape nor any hope of pulling out.

Mariposa watched on, fighting much harder to suppress her squeaky moans as her fingers continued working to get herself off. Her pupils rose and fell along with her older brother's hips and his massive balls wetly spanking Meteora's ass. Occasionally she met Meteora's burning, insatiable eyes. Even though she was getting plowed hard by Marco, she took fleeting moments to shoot a stare at her sister that loudly said, "Yeah, I'm fucking your big brother. What're you gonna do about it?"

Mari nearly jumped out of her skin when Marco suddenly jumped to his feet and carried Meteora out of the living room while she remained impaled on his dick.

The younger sister immediately shot out of the couch like a bullet after the two. She kept her steps as quiet as possible so as to not give away that she was in hot pursuit.

She came upon Marco's room, where the two maintained the same position as before. Mariposa was on her knees, moist fingers thrusting and flicking away at her sex as her climax was fast approaching.

"Heh. What are we doin' here?" Meteora asked between gasps as she ran a claw down Marco's rugged face.

"Didn't wanna stain the couch." Marco responded huskily. His face strained as he maintained his pace from earlier.

Meteora couldn't hold back all the moans that escaped her. Since they got to his room, Marco was no longer bound by etiquette to keep quiet. He went as hard as he truly wanted to, making sure that his little lover could feel every inch of his bitch-breaking cock bashed her womb over and over like a series of colliding freight trains. Meteora wouldn't have it any other way. This was how she always loved Marco, unchained like a hungry, rabid dog, acting like more of a monster than she ever could.

Meteora's claws went under Marco's shirt, and dug into his bare back. She pulled down, leaving burning red lines in her wake. She managed to draw a bit of blood, but it didn't cross his mind the least bit. Even though he grunted from the pain, his thrusts remained strong and fast, his lust overpowered the agony. Though soon, they started getting a bit sluggish in their rhythm and the arms that propped him up began to quake beneath the pleasure and pressure building in his loins. The sudden change in pace and energy wasn't lost on Meteora.

"Oh? Is Daddy about to cum?"

Marco simply nodded as his eyes screwed shut and his brows furrowed.

The horny hybrid simply giggled, before her legs and tail wrapped around him even tighter. One arm wrapped around his neck while the other brought his head down closer to hers.

"Fill me up, Daddy!" She begged huskily into his ear. Her insides stroked him harder. Velvet flesh caught his throbbing member in a death grip which Meteora knew was a surefire way to push Marco off the edge he struggled to cling onto.

At the same time, Mariposa had flicked her clit the right amount to be right there with them. Her body stiffened and shuddered as her orgasm washed over her in overwhelming waves. She had to bite on a finger to keep herself from making a sound loud enough for the actors in her peep show to hear.

Like a valve that had been turned, the floodgates opened wide as a torrent of cum gushed forth into Meteora's hungry pussy. Her size shifting abilities allowed her to expand her cervix wide enough to take every single glob of cum and leave not a single drop wasted. Of course, a few white drops had seeped out between them, racing down Meteora's ass cheeks for Mari to see, then some more immediately followed, as if the two conspired just to rub in how much her older brother seeded her.

Both of their bodies released all the tension that had built up over time and they were left in a limp, sweaty pile. Though Marco was much bigger and heavier, Meteora's monstet strength kept her from being crushed under his weight.

"Oh gosh, there's sooo much." Meteora spoke loud enough for Mari to hear. "You're gonna knock me up."

"No, I won't. Your mom made sure of that."

"Heehee. I know. But I like to pretend you do."

Marco finally rolled out of Meteora, his limp, yet large cock unplugged from his partner's pussy. Immediately, his seed had started flowing out in bubbly globs and pooled beneath her ass.

"I thought you usually just 'swallowed' it all." Marco pointed out as he saw the full extent of the mess he made come pouring out.

Meteora shrugged. "What, don't you like seeing your creampies gushin' outta me?"

Marco simply stayed silent, shaking his head as he laid in bed on his side.

"Just, uhh…" Marco's words were cut off with a deep yawn before he continued. "... tell her I went to bed early. Clean yourself up and go back to the living room. She'll want to know where we went."

"Oh, I don't think it'll be that big of a problem." Meteora responded while looking dead into Mari's tired eyes and licking cum off her claws.

She smiled and threw up a thumbs up to Mari, who immediately ran to her room with a mind that ceaselessly raced with all that she bore witness to that night.

...

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