The two siblings continued struggling to get free of their parent's grasps and into each other's. Shining Armor and his father shouted at each other. Twilight and her mother continued to let their tears loose, but the former stopped when something popped into her head.

Twilight had an idea.

A risky idea.

Twilight had a wonderful, risky, incest assuring idea.

"Wait!" Everypony went silent at Twilight's shout and gave her their full attentention. "I have a proposition." She said as continued to try and free herself.

"What the hell could you possibly offer us, son stealer?!" Velvet demanded angrily as she held on.

"If you let us be with each other.....we'll do it with you without contraceptive spells."

"..."

"..."

"..."

Every pony was dead silent as they registered what Twilight had propositioned.

"Twilight" Night broke the silence "You know contraceptive spells are the one rule that every pony has to abide by when it comes to incest. Not even you could give us the go ahead."

"He's right" Shining contributed.

"Yes, but Celestia could."

"Are you sure?" Velvet asked.

"When I was crowned Princess, she told me I had ten freebies I could use. All I'd have to do is send her a letter saying I'm cashing one in."

"..."

"...just one letter?"

"Cross my heart and hope to fly, stick a cupcake in my eye" Twilight said as she went through the motions of the Pinkie Promise. Velvet and Night looked at each other with wide eyes, silently telling each other the same thing.

'She's serious.'

The married couple pondered on the matter, staring into each other's eyes. The were searching for an answer, an answer that could take hours, maybe even days to-

"Send the letter" they said in unison "Jinx. Owe me a rimjob."

Once the two released their offspring, Twilight charged her horn and summoned a quill, parchment and the now older, taller, fit bodied Spike.

"What the-? The old house? Twilight! You pulled me away from the party at the cas- My nap! From my nap."

"This will only take a second Spike" Twilight said as she wrote out the letter herself "You'll be back to getting Rarity and Sweetie Belle drunk on eggnog for a threesome soon enough."

"I-! That's not-! That's neither here nor there!"

"Not important. Here" she said as she handed Spike the rolled up parchment "Send this to Princess Celestia, ASAP, and I'll send you back when she replies." Spike shrugged his shoulders and breathed his magical fire on the message.

BURP

Immediately after it magically sped off, Spike belched out a message, much to everyone's surprise. Twilight took it in her magic and unrolled it. Her eyes widened as she moved her head back in surprise.

"That was....unnervingly fast. She said yes."

"FUCK YEAH!"

"PRAISE THE SUN!"

"ALL IN THE FAMILY!"

"What?" Spike said.

"Don't worry about it, Spike. Time to send you back."

"......Okay. Nice seeing you again sort of Mom and Dad. Sorry I couldn't come over this year."

"No worries, son. And go knock 'em dead" Night said with a wink, making Spike blush.

"I...I wasn't.....Thanks Dad."

"Oh Spike" Velvet sang to her adoptive son "Have a Happy Hearth's Warming. And not to spoil anything, but, I'm planning on a special visit for you next Hearts and Hooves Day." Velvet gave Spike bedroom eyes as she slowly licked her upper lip and slowly brushed aside part of her robe to reveal a bit of her bra-less cleavage. Spike's eyes widened and his face steamed red.

"Uh...g-good to know. Twilight, send me back now while I'm like this."

With a flash, Spike was teleported back to Canterlot Castle, totally not intending to ram Rarity and her sister.

"How is he by the way?" Velvet said after she leaned in to speak in her daughter's ear.

"Very good. His tongue work will make you temporarily blind."

"That is so good to hear."

"Not as good to hear as Celestia's go ahead" Shining said as he approached his mother and placed his hands on her sides, starting to stroke them up and down.

"Wha-?"

"I couldn't agree more, BBBFF" Twilight said as she stepped to her father and pressed into his chest, reaching a hand down to rub his stallionhood trough his pants.

"Wait, we thought you'd want to have each other first. You've been waiting so long" Night Light said.

"True, but it means so much to us that you gave your blessing that we thought we'd....show our gratitude" Twilight said as she shifted up and down, making a show of her pressed tits.

"Our hot, eager, first time without contraceptive spells, gratitude" Shining said as he stroked his mother's ass, briefly giving her horn a quick kiss, making her squeak. "Think of it as an early Hearth's Warming present."

Velvet and Night looked to each other as their children waited for a response. "Kids! You shouldn't have!" the latter said first, innocently and with a smile.

"It's what we've always wanted!" Velvet mimicked in kind.

"We know."

Twilight lightly pushed her father against the kitchen island as they began to kiss, her wings beginning to rise. Shining did the same, pushing his mother to the table, which she placed her hands on to keep herself up as she sat. Light, pleased moans and smacking lips permeated the kitchen. All their mouths soon parted to begin tongue wrestling.

After a few minutes, Twilight slipped her hands beneath her father's shirt to feel his abs. They broke away so she could take it off and admire them fully. "Wow" she said as she bit her lip and rubbed her hands over them "No wonder Shining's such a stud. Like father, like son."

"I can attest to that" Velvet said as she admired and explored her own son's muscles before resuming their heated kiss. Twilight was a bit more creative, leaning in to give some loving kisses and licks to her father's torso before continuing their kiss.

"Mom, I wanna see your tits" Shining whispered into Velvet's ear after giving her a few pecks on the cheek.

"You know you don't need permission, sweetie. Go ahead and whip em out" Velvet said as she jutted her chest forward a bit.

"No, I mean, I want you to show them to me. Slowly."

"Oh" Velvet said, understanding her son's wish. She then lifted his chin by her fingers, gave him her best set of bedroom eyes, and gave him a brief kiss on the lips. "I can do more than that, honey." She put a hand to his chest and lightly pushed him back, allowing her to stand and turn him around to sit him on the table. She walked off and disappeared behind the doorway.

"Ooh, you guys are getting a show" Twilight said, reaching her hands into her father's pants, stopping him from questioning what she meant by 'you guys.' Night shuddered and bit his lip as his daughter teasingly traced the tips of her fingers along his engorged stallionhood with a giggle. "Keep your eyes open, Dad. You don't want to miss it" she said as she stepped to the side to give him full view while still teasing his member.

Slow sensual music came on a few seconds before a gray leg appeared from the doorway, slowly lowering to the floor, showing only up to the knee. Father and son watched with anticipation as the leg turned back and forth a bit, exposing more of itself by only a tiny bit. And then it retreated out of view.

Only two seconds later, Velvet slowly sauntered in, her legs only becoming slightly visible with each step thanks to her robe. She stopped and turned her head to the right to look at her audience with sensual eyes, mainly at the mesmerized Shining and Night. She then slowly turned to have her back facing them, but kept looking at them over her shoulder. She slowly moved her hips back and forth, waving at them with her tail, raising it slightly as if she had no robe on. She then raised a hand and brought it to her shoulder, slowly pushing down the fabric to expose her shoulder and a hint of cleavage. She quickly pulled the fabric back up and repeated it with the other shoulder. When she covered back up, she pulled out her trapped mane from the robe, shaking her head about to loosen it up. When she stopped shaking her head, she looked over her shoulder again, and gave a wink.

Shining was now slowly rubbing himself through his pants, while Twilight continued to tease her father, using her magic to hold his hands in place, unbeknownst to him.

Velvet then used her magic to pull a small stepping stool next to her. She turned to face the stool, her right side now to her audience, and slowly raised her right leg to rest on the stool. She managed to get her robe to only expose her leg to the shin. She leaned forward and used her hands to slowly expose the rest of her leg, to above the knee, to halfway up her thigh. Shining and Night twitched forward a bit when she briefly flashed them the side of her light blue panties, making her giggle.

Velvet used her hoof to move the stool, now putting her back to them again. She put her hands to her sides, swaying her body as she trailed them down to her behind. She brushed her hands forward, placing them out of view. The way she moved, the others could tell what she was doing. She placed her hoof on the stool again, giving them a side view of her leg, and proceeded to put her hands on it and trace them down, stroking her own leg as she leaned forward. As they could tell there was no distance between her face and her leg, they realized that's what she had begun to kiss when they heard the sound. They could also tell she was giving some licks from the slurping noise.

This coupled with her waving her covered rump at them, distracted them from her horn, which she had charged up to perform a phasing spell on a certain piece of garment, allowing her to pull it down by the covered leg. She straightened herself and put her hoof on the floor before sticking out her leg and pulling aside her robe to show it off, swaying her hips and bending her knees to go up and down like a belly dancer.

She covered up her leg before turning and quickly bending the knee of the other one to throw it back and up. A small, light blue ball sailed through the air, expanding as it did, and caught on Shining Armor's horn by one of the holes. Shining's eyes widened as he recognized the aroma on the fabric and quickly pressed it to his nose, taking a deep whiff.

"Hm hmm" Velvet laughed amorously, catching her son's attention and making him take off the panties. Shining and Night's eyes widened further, if that was possible, at the sight of Velvet. She had pulled back the lower part of her robe, while still managing to keep the upper part closed, exposing her whole lower half. Legs, marehood, and all. A thin string of fluid slowly dripped from Velvet's folds, carrying with it a dehydration inducing aroma.

Velvet trailed her eyes up and down her son before slowly licking her lips, making the young stallion's cock and ears twitch. She slowly strutted forward, closing the distance between them, her son and husband drooling at the sight. She looked over her son again, biting her lip as she rubbed the spot over her dripping pussy. She made a shooing gesture, getting him to stand and allow her to retake her seat, sitting the same way she had before, but with her legs crossed.

Velvet gave her son a smoldering look before bringing up a hand and curling her finger at him in a come hither gesture. As he approached, she uncrossed and spread her legs, exposing herself once again. As she did this, she reached up to the sash of her robe and slowly loosened it. Once the sash was undone, she slowly pulled at the sides of her robe, exposing her bare breasts. Shining wasted no time in getting his hands full of his mother's mammaries, gently massaging them.

"Ah" Velvet moaned in approval. Her husband and son knew just how to handle a mare's breasts. Rough or gentle when they wanted. "Mmhm" Velvet moaned as Shining thumbed her nipples, engaging him in a kiss before he started gently pinching them.

"Ah!" Night Light exclaimed, gripping the edge of the kitchen island with his now free hands. He was broken out of observing his son and wife by the feel of a tongue slowly trailing up the underside of his cock. "Ha, ha, haaa."

Twilight ended her lick by trailing her tongue up the topside, getting a taste of her father's pre. "Mm, full, thick, and firm. Just the way I like it. Thanks, Mom."

"No problem, sweetie" Velvet said, momentarily breaking her kiss with Shining.

Night Light shuddered as his daughter lapped at his throbbing erection, stopping every few seconds only to deliver some kisses along it. "You...you tease." Twilight only hummed playfully. She then decided to appease him by repeating her first lick, but this time ending with her engulfing him entirely, making him gasp.

"Mm" Twilight moaned in approval, the vibration making Night shudder again and place a hand on the back of his daughters head. Twilight slowly drew her head back, her father's hand offering no resistance, and coming back down to give her father's cock it's preffered resting place in most of her throat. She started to suck off her father, her pace increasing with every few seconds, her lips going along his cock while her tongue stroked at the underside.

"Oh baby" Velvet moaned, Shining now having switched to suckling one of his mother's breasts like he was still feeding while he continued handling the other. Velvet rubbed her pussy as her son suckled her, hoping he'd soon do the same downstairs. Shining rightly suspected that with one hand occupied, his mother was getting tired of holding herself up. So he removed himself from her breasts and placed a hand behind her back, catching her attention. He took her other arm in his hand and relieved it of it's duty, before leaning forward, having her lay on the table.

Shining briefly looked at his mother with caring eyes and leaned down to give her a quick kiss. The kiss made her smile brightly. And then she smiled excitedly when he delivered some kisses to her breasts and started traveling downward. She rested her head on the table and bit her lip in anticipation, her legs beginning to twitch as he kissed her thighs. He kissed her inner thighs and began trailing up to the spot so hot and wet it put summertime Florida to shame. Then he seemed to go out of his way to avoid the actual spot, kissing around it. She was about to beg him to attend to her directly.

And then he placed his whole mouth on her marehood, making her gasp deeply. These lips weren't meant for making out, but Shining seemed to believe otherwise. He moved his mouth about in a passionate kiss, lightly playing with the outer lips with his tongue. Velvet wrapped her legs around her son's head, pleasurably whining as he serviced her. And then the guttural moans came when he stuck in his tongue and did his best to have it imitate a seizure.

"OH. OH Shiny. Eat me out."

Siblings seemed to be working in tandem, giving their respective parents quality oral with the trimmings. Twilight would sometimes suckle on Night Light's tip before taking him in full again, and then gently stroking his balls. Shining wriggled his tongue inside his mother, keeping it in during the brief moments he separated his mouth, exposing her to the air. He also began to rub the spot above her clit, giving it a few flicks and light rubs every ten seconds.

Both parents took hold of their children's heads as they neared their peak, gasping as they got closer and closer. Twilight gave a last descent while using a wriggling motion with her tongue, and Shining pressed down and rubbed on his mother's clit with his thumb at the right pressure.

"RNGH!" Night Light grunted as he came, pressing down on his daughter's head, who gladly helped by grabbing onto his behind. The first few shots went right down her throat, and the rest went into her mouth as she drew back to actually taste the substance.

"Ah! Ah!" Velvet yelled as she came, tightening her leg hold on her son's head as her hips bucked. Shining drank the few bits of liquid that squirted out of his mother, suckling her marehood as her screams died down to pants. It wasn't the most she could produce, but it was not unappreciated.

"We have....the best kids" Night Light panted.

"Yeah we do" Velvet panted.

"And now, we move on to the main course" Twilight said.

"You guys aren't too spent to keep going are you?" Shining asked.

"Is that even a real question?" Velvet replied "Get over here, and Twilight you get on there so you can start conceiving me some grand foals to spoil."

"Yes ma'am!" the now naked Shining exclaimed as he jumped on the table and hovered over his mother. He lined himself up and began inserting himself into his mother. And then her legs wrapped around him and forced him in. "Whoa!"

"Ngh! None of this nice and slow business. Get to it soldier! That goes for you too Twilight."

"Whoa!" Twilight exclaimed as she found herself pulled up, turned around, and forced to lean on the kitchen island. The sweats she was wearing were pulled down quickly and her father grabbed her hips and lined himself up behind her. "Wait! Spike's only tongued and fingered me while Shining's been awa- AH!" Twilight jolted forward and her wings flared out as her father's cock plunged into her. "Ah! Nev- Mm. Never mind."

Night Light smiled as his daughter took him, gasping with each of his thrusts. He removed his hands from her hips and pulled her shirt off, slightly difficult with her rigid wings. Once it was off, he began fondling her perky tits with a smile that she returned as she looked back at him.

"Oh! That's it sweetie. Pound your mother" Velvet moaned as she continued using her legs to push him in, though by this point, he was contributing half the force. Shining kept a steady rhythm as he rammed himself into his mother's steaming wet pussy, the remains of her earlier orgasmic fluid acting like a pleasure enhancer. The table soon began to creak and shift from the strong movements.

"Oh Daddy" Twilight moaned as Night Light fucked her, nuzzling his head as he kissed her neck. After a few minutes, she placed her hand on his chest. "Wait, oh....don't stop, I mean stop. Just really quick. I want to turn around. I want to do this facing you." Night Light nodded and removed himself from his daughter, who very quickly turned around. She leapt onto him with perfect accuracy, impaling herself on him with a gasp as she wrapped her non erect limbs around him. "Okay" she said with a nod. Night Light resumed pumping into her as she leaned back, hanging on by his shoulders and her legs still wrapped around him. She brought herself forward to kiss her father, who gladly returned the favor. "Mm."

"Oh Shiny! That's it. Right there! Keep doing that." Velvet groaned as Shining pumped her with an upward thrust, causing the topside of his dick to brush right against her G-spot. This brought back memories of their best times. This was now surely to rank at number five. It was a rare and treasured occurrence when he made contact with her cervix, and he was just brushing it right now, sending familiar jolts through her. And this time when he let loose, she could actually get pregnant. Which could very well bump this up to the top three. "Mm! Yes! Fuck a baby into me!"

"Mm, Daddy. Fuck me" Twilight moaned as she hugged her father, resting her chin on his shoulder. "What?" she said when she noticed they were moving, her father's thrusts now more spaced out but made more impactful by his steps. She looked at her father questioningly.

"I thought we should give them some company" Night Light explained as he moved to the table. "Plus, I wanna change things up now." Night Light managed to pull his daughter off of him and turned her around. He repeated what he had done before, but this time Twilight was hunched over, holding herself up by her hands on the table. They were right next to Shining and Velvet.

"Hello honey."

"Hey sis."

"Hey guys. So I guess we're here now- Ah!" Twilight's wings curved as they grew more rigid, a response to her father plunging into her much like Velvet had made Shining do. She began to pant as her father rammed into her from behind.

"Ooh, your father's never mounted you like this, sweetie. Should be a great endurance test for your arms and legs."

"Well this is one, ah, test I actually wouldn't mind faaaaaaaiiiii-!" Twilight ended in a high pitch as she felt lips begin to nibble and suckle along her wings. Only Spike had pruned her in this manner before, Shining not yet having taken the chance, but he had to be gentle with his sharp, dragon teeth. Night Light had no such issue. "EEP! Mm!"

"Ngh. I definitely have to do that next time" Shining said as he observed his father and sister with his mother.

Twilight released a high pitched "Mm hm!" as she furiously nodded her head.

"God, that's so hot" Velvet said "I've always loved watching you fuck our daughter. It turns me on so much."

"Ditto. You know, with you and our son."

"Who told you to stop preening?!" Twilight screamed angrily. "Sorry. It's just really good. EEP! Oh yeah, Daddy. Preen me while you fuck me."

"Seriously, that's fucking ho- Oh ho!" Velvet exclaimed as she felt her horn enveloped in magic and tugged on. "Ooh, stepping up your game with a horn job, son? Atta-boy- Ah!"

The table was now a good foot from where it had been. Twilight panted with her tongue out like a dog while her mother began mimicking her father during his blowjob. Shining and his father fist bumped each other as they kept their heads up. Then mother and daughter looked at each other and silently communicated a way to speed things up. They nodded.

"Oh boys" Velvet called lustily "I think Twilight wants to say something." The two stallions looked at Twilight questioningly as she nodded.

"I wanna kiss mommy." The stallions' eyes bugged out of their sockets. This was actually new. "If that's okay with her."

"Of course it is, sweetie. Come here and give mommy a kiss."

Shining and Night Light's paces increased slightly as Twilight moved herself over and hovered over her mother. They both looked at each other with bedroom eyes, and then Twilight gave her mother a light peck on the lips. They giggled.

The stallions were outraged. It was still good to see, but a cutesy kiss was not the best thing at the moment! They wanted very much to voice their objection.

And then they kissed for real.

"Mm" Twilight and Velvet moaned into each other's mouths before moving them about, looking as if they wanted to eat each other. They seperated only to show their tongues batting at each other as they gave husky laughs. They reconnected, and their movements made it clear the tongue action was continuing, also because their tongues would come out a few times. This successfully pacified the stallions and increased their pace to maximum, fulfilling the mare's goal.

"Ngh! I'm close!"

"Same here!"

"Oh yes! Harder! I want you to do it. I want you to cum inside me, Daddy. Try to knock me up!"

"Oh Celestia, yes! Your cock feels so good inside me, Shiny. Your thick cock is gonna make Mommy cum!"

Shining and Night Light gave one last thrust, hilting inside their respective partners before finally releasing their loads.

"Ah! Yes! Daddy's cum! I'm being filled with Daddy's life giving cum!"

"Yes, Shiny! Fill me up! Fill me up with your babies!"

The stallions emptied themselves before falling forward and catching themselves, hovering above their partners. All four panted as they came down from their orgasm highs.

Velvet pulled her son to her to give him a passionate kiss. "Mm. Good job making giving our blessing worth our while."

"Very good job" Night Light agreed as he leaned down to give his daughter a more chaste-ish kiss. "Congrats you two. You are now the first sibling lovers in the Sparkle family."

Twilight and Shining looked at each other with smiles on their faces, silently cheering.

"Well go on then, kiss. The suspense is killing me here" Velvet said.

The siblings gave a light chuckle before leaning in and connecting their lips in the most loving kiss they'd ever had, knowing that their love could finally blossom, and with parental approval. It was much like the kiss Shining shared with Cadance when they wedded.

"They do make a cute couple" Velvet admitted.

"That they do."

"And a hot one."

Author's Note

I swear TwiShine sex is gonna come

Giggity