Write the fourth erotic chapter of a detailed story with a lot of dialogues based on this: (Smaug keeps pushing insistently inside her, until his spiny cock doesn't lock itself in her vagina, and now not even he can remove it until he won't cum. So he continues, enjoying himself greatly, as his withered cock slap against Kefra's meat. Kefra won't be able to free herself from him. And Gixcaririxen eventually dies)

The story so far is this: [Chapter 1: An Unexpected Encounter
Kefra fluttered her emerald-green wings, casting curious glances towards the Middle Earth below her. Gixcaririxen, her loyal husband, soared beside her, the wind rustling through his crimson scales with every sweep of his mighty wings. Their gazes were fixed upon the familiar figure of Smaug, the great fire-drake that had once terrorized the land and hoarded its treasures.
“Gix, tell me everything you know about this Smaug,” Kefra whispered as they studied the dragon from afar. Gixcaririxen obliged, recounting his knowledge of Smaug’s rise to power and eventual downfall.
As he spoke, Kefra’s eyes narrowed, her disdain for the dragon growing with every word. “He’s nothing more than a vile, greedy wyvern! Not worthy to be called a dragon. With our power, we could squash him beneath our feet like a mere insect.”
Gixcaririxen nodded in agreement, but just as Kefra opened her maw to challenge Smaug, a mischievous gleam flickered in her gaze. She remained silent, pondering her devious plan. Then, communicating telepathically with her husband, she revealed her intentions. Gixcaririxen smirked in anticipation of the fun they were about to have.
Before Smaug knew it, Kefra and Gixcaririxen had grown to the size of Godzilla, towering over the fire-drake as they loomed like storm clouds above him. Smaug snarled defiantly, flicking his tongue out and narrowing his eyes.
“You dare challenge me?” Smaug spat, his voice a guttural growl that reverberated through the air.
“No challenge,” Kefra sneered, looking down at the fire-drake with disdain. “Just an observation, you are unworthy to be called a dragon. You’re a pathetic wyvern that only deserves to be scraped off our feet.”
Smaug’s eyes flashed with fury, and his body tensed, ready to spring into action. However, Kefra had other plans. With a sly grin, she shrank to a size just smaller than Smaug himself. She pretended to have had a sudden revelation about Smaug’s life, and feigned admiration for his violent conquests and cunning deceptions.
“Smaug, my love, I was wrong about you,” Kefra purred, her eyes reflecting the fire-drake as they seemed to dance around him. “You are far more magnificent than my husband could ever be; a true dragon worthy of my adoration.”
Astounded by the sudden change in attitude, Smaug cocked his head, his yellow eyes filled with suspicion. But as Kefra sauntered closer to him, seduction rippling through her movements, she raised her tail, revealing her intimacy to Smaug. “See what you’ve been missing, Smaug,” she cooed. “If you would, claim me as your own, for you deserve far more than what Gixcaririxen could ever offer.”
Gixcaririxen watched the scene unfold, struggling to hide his grin behind a false scowl. Smaug hesitated, caught off guard by Kefra’s sudden advances. He glanced at Gixcaririxen, wondering if this could be a trap. Gixcaririxen held his breath, not daring to make a move that might give away their ruse.
But then, as Smaug turned back to Kefra, his pride and greed overcame him. He stepped closer, allowing himself to be drawn into their wicked game, ready to take what Kefra had offered

Chapter 2: A Twisted Embrace
As Gixcaririxen lay snoring on the cold floor, Kefra struggled to come to terms with her sudden loss of power. The fear and vulnerability she now felt was a sensation she hadn’t experienced in centuries.
With Smaug towering over her, Kefra’s heart raced. The fire-drake’s elongated, withered, and spiny cock emerged from the shadows, and her eyes widened with terror. Chained and powerless, she knew there would be no escape for her.
“Such a helpless creature you are now, Kefra,” Smaug hissed, his voice dripping with venomous mockery, the waves of heat emanating from his body washing over her. “Once a proud and powerful dragon queen, and now nothing more than my plaything.”
Kefra clenched her teeth, gripping the chains that held her captive. She refused to give in to Smaug’s taunts, even as her body trembled with fear.
“And to think,” Smaug continued, lowering his snout closer to Kefra’s face, “your husband sleeps while I claim his precious queen for myself. How pathetic he is.”
Tears of anger and humiliation welled up in Kefra’s emerald eyes. She searched for any trace of her powers within her, but found nothing. Utterly helpless, she stared him down as Smaug inched closer.
With a sickening grin, Smaug slid his throbbing, grotesque appendage against Kefra’s slick, trembling entrance. Her jaw clenched tightly as a rebellious fire still burned in her soul, glaring at him with defiance, despite her terror.
“Are you ready to fulfill your promise to me, Kefra?” Smaug growled, pressing his length against her unwillingly. “To be taken as my prize, to serve me as a true dragon queen should?”
Kefra tasted bile in her throat as she answered between gritted teeth. “You may have me now, but you will never break me, Smaug. I will never submit to the likes of you."
A sinister laugh erupted from the depths of Smaug’s chest as he stared into Kefra’s rebellious eyes. “We shall see if your spirit remains so unyielding once I claim your body.”
Without any more warning, Smaug pushed his monstrous cock deep into Kefra’s body, a gut-wrenching scream escaping her otherwise valiant resolve. Her voice, however, was no match for the sound of Smaug’s triumphant laughter echoing in the chamber.
As every inch of him invaded her, Kefra’s body and mind were wrenched with pain, caught between a relentless barrage of overpowering sensations and her fierce determination to remain unbroken. Yet, as his relentless thrusts continued, the sheer torture she felt began to push her to the brink.

Chapter 3: The Battle Within
Determined to not give Smaug the satisfaction of her agony, Kefra gritted her teeth, barely containing the maddening sensation washing over her from the foreign invasion of her body. Her breaths turned ragged, unwilling to admit that the dragon she despised had managed to elicit any form of pleasure from her. However, with every dominating thrust from Smaug, the reality of the situation became all the more undeniable.
Silent tears streamed down her emerald-green cheeks as Kefra tried to regain her will. Clinging to the memories of her husband, Gixcaririxen, she remembered the passionate nights they had shared together. The strong, red dragon’s embrace was filled with love and pleasure, but more than that, there was a profound level of trust between them. Her devotion to Gixcaririxen had never wavered, even in the darkest of times.
In this state of despair, Kefra registered a horrifying realization: unlike her devoted and caring husband, Smaug’s vile, withered cock was touching points within her that Gixcaririxen had never been able to reach. The unspeakable truth dawned upon her, that her body was slowly betraying her mind and heart, finding carnal pleasure within Smaug’s embrace.
“No, this can’t be happening,” Kefra cried out, her voice hoarse and broken. Gritting her teeth, she clenched her eyes tightly, attempting to block out the sensations that threatened to break her will completely. She silently prayed for her beloved Gixcaririxen to come to her aid, to save her from this torment.
Through the haze of her anguish, Kefra sensed a dull, distant feeling wash over her. The once-vibrant life force of Gixcaririxen seemed to be fading, as if the red dragon’s strength and vitality were being drained from him. Smaug, meanwhile, kept pumping aggressively within her, determined to claim the dragoness and her womb, so that she may lay his vile eggs – the offspring of a wyvern unworthy even to be called a dragon.
“No!” Kefra screamed, desperation adding potency to her denial.]

The description of the two characters is this: [Gixcaririxen and Kefra are fictional characters often showcased in various fictional multiverse scenarios, most prominently in the Dragon Ball franchise. They are two western dragons, each possessing unique powers, abilities, and personalities. Despite their vast differences in age and origins, Gixcaririxen and Kefra form a strong bond, eventually leading to their marriage.

Gixcaririxen
Gixcaririxen is a red, immortal western dragon who stands at 40 meters tall. With millions of years of experience under his belt, he is incredibly intelligent and kind-hearted. Gixcaririxen is known for his spectacular dexterity, which he demonstrates using his dragon hands. Although he appears to have a greedy nature, this trait is vastly overshadowed by his affable personality.
Having traveled through numerous universes, including those in the Dragon Ball series, Gixcaririxen has gained a plethora of powers and techniques. These include regulating his size, the Ultra Instinct technique, and the ability to use magic to create any object he desires among many others. Despite having unlimited power, he consistently chooses to hold back in confrontations with characters like Goku, Lord Beerus, and Dr. Manhattan, as he doesn’t want to hurt them. However, this self-restraint vanishes when he faces evil gods, dark celestial monsters, or other evil beings.
One pivotal aspect of Gixcaririxen’s life is his relationship with his wife, Kefra. He cares for her deeply and loves her unconditionally. His affections are focused solely on her, and he doesn’t display any attraction towards any other creatures. Even before meeting her he never felt attraction towards the likes of mammals, considering them mere children and feeling uncomfortable at the thought of having relations with them.

Kefra
Kefra’s origin stems from a multiversal party attended by characters from various universes, including those from the Dragon Ball Super series. It is during this party that Caulifla and Kale fuse into Kefla to defeat Goku Black. Due to her dissatisfaction after a sexual encounter with Cabba, Kefla decides to seek out Gixcaririxen after witnessing his powers in battle.
Their interaction, however, causes Kefla to mutate into a green female western dragon with green eyes, now standing at the same height as Gixcaririxen. Determined to find a solution, she collaborated with Gixcaririxen to use the dragon balls to separate Caulifla and Kale from herself, allowing her to remain as a separate entity known as Kefra.
Kefra retains the memories of Caulifla and Kale along with the potara earrings as a symbol of her past fusion. Having acquired her husband’s powers and abilities, Kefra has grown into a playful, often perverted, yet wise and humble figure to those who deserve her respect. At her core, she is a colorful and doting partner to Gixcaririxen.]

Smaug's additional informations: [Smaug was a fire-drake of the Third Age, considered to be the last "great" dragon of Middle-earth. He was drawn to the enormous wealth amassed by the Dwarves of the Lonely Mountain during King Thrór's reign. He laid waste to the nearby city of Dale and captured the Lonely Mountain, driving the surviving Dwarves into exile.
For 171 years, Smaug hoarded the Lonely Mountain's treasures to himself, staying within the mountain, until a company of Dwarves managed to enter the Lonely Mountain and awaken him from hibernation. Correctly believing that the Dwarves had received assistance from the men of Lake-town in entering the Lonely Mountain, Smaug left the mountain to wreak destruction upon Lake-town, nearly destroying it before being slain by Bard the Bowman.

Biography
"I AM FIRE. I AM...DEATH." - Smaug, The Hobbit: The Desolation of Smaug
Smaug is presented with a long, serpentine neck; a crest of spurs on his head; a crocodilian facial shape; a compact torso with a streamlined shape; spines and spikes along his back and the back of his neck; stocky hind-legs; a very long tail; mostly dark-red scales which turn dull-golden on his underside; and gleaming, orange-yellow eyes coloured like fire, with slit-pupils which possess an intricate, keyhole-like shape. He has a deep, resonant voice with an underlying growl.
He appears in the prologue of the first film, The Hobbit: An Unexpected Journey, described as a "fire-drake from the north" before taking residence in the Lonely Mountain. Only small parts of him are glimpsed throughout the film: his legs, tail, a small part of his head, and his wings as he flies over Dale, and his eye when he is sleeping in his mound of treasure, in the final scene. In addition, he is a topic of discussion amongst the White Council as Gandalf cites his reason to support Thorin Oakenshield's quest.
When Thorin and Company arrive at the Lonely Mountain and send their burglar Bilbo Baggins to find the Arkenstone, the Hobbit unwittingly causes a landslide amongst the mountainous pile of treasures, uncovering the dragon. Smaug stirs from his sleep, suspicious that someone is in the chamber with him. Although Bilbo is forced to use his Ring to keep out of sight from the dragon, Smaug is immediately aware of his presence by his scent (whilst the smell of hobbit is unknown to him). He begins to search for Bilbo, beckoning him to come out from where he is hiding and when Smaug gets too close, the Hobbit is overcome with fear and attempts to run, only to alert the dragon, who chases after him through the chamber. Bilbo evades him and hides behind a massive pillar, still under the cloak of the ring. Smaug continues his search and claims that he is aware of the Ring in Bilbo's possession and that he sensed that Bilbo has something "made of gold, but far more precious," which in turn forces the Hobbit to remove the Ring. Smaug is amused by Bilbo's knowledge of who he is, and begins his conversation with the Hobbit in order to deduce his origins.
During their conversation, Bilbo then tries to lie to Smaug by claiming that he is no more than a simple traveler who came to the mountain alone to see the dragon, as he didn't believe the tales about him. The dragon asks Bilbo if he thinks flattery will keep him alive, and asks who he is and where he comes from. Bilbo responds in riddles, claiming that he "came from under the hill and over hills and under hills his path had led", and through the air he was "he who walks unseen". Smaug hardly believes him but asks Bilbo what also did he claim to be and the Hobbit answered that he is the "luck-wearer", "riddle-maker", and "barrel-rider". The dragon then reveals that he knows that the Dwarves are outside of the mountain, although Bilbo (whose eyes are on the Arkenstone) tries to deny it, with Smaug not taking the bait. Soon, a cat-and-mouse banter begins with Smaug and Bilbo, as he makes unfavorable comments about Thrór and boasts about his armor and invincibility. Smaug then realizes that Thorin, Thrór's grandson, has sent Bilbo for the Arkenstone and reveals to him that he found out about Thorin's goal "some time ago", and says that it doesn't matter because the quest is ultimately futile, as he is aware that Sauron was preparing to openly declare himself once more.
Later on, Smaug tries to break Bilbo's friendship with Thorin by lying to him, claiming that the Dwarf is using him and finds his fate worth nothing, but the Hobbit refuses to believe him. Smaug is intrigued by his word and wants to know what reward Thorin is willing to give him if he succeeds in finding the Arkenstone, before stating that he will never give away any of treasure, not even a single coin. During the game, Smaug discerns the Hobbit's attempt at stealing the jewel and keeps Bilbo from catching the Arkenstone, boasting about his superiority. During the chase, Smaug shows Bilbo his underbelly, coated in gems, and the Hobbit catches a glimpse of a single missing scale. Smaug then spots Bilbo's eye on the jewel and claims that he is almost tempted to let him take it, only to let it consume Thorin to madness just like it did Thrór. At that point, the dragon ends the banter with Bilbo and attacks the hobbit. Bilbo uses his ring to escape and manages to get the Arkenstone while Smaug flies around in rage and unleashes a torrent of flames around the treasure chamber in an attempt to roast the Hobbit alive before he can escape.
When Smaug sees Thorin pointing his sword at Bilbo, asking if he found the Arkenstone, the dragon charges. The other Dwarves with Thorin appear to defend their friends, and Smaug charges after them, summoning his fire to attempt to burn them to death. However, the Dwarves manage to elude him, and Smaug begins to silently stalk the abandoned halls in search of the hidden Dwarves.
"I am King under the Mountain!" - SMAUG, THE HOBBIT: THE DESOLATION OF SMAUG
Upon realizing the dragon is blocking their only path out of the mountain, the Dwarves hatch a desperate plan to lead Smaug to the Lonely Mountain's forges in hopes that they can trick him into rekindling the smelting vats with his fire breath. They reveal themselves to Smaug, initiating a perilous game of cat-and-mouse through the halls of the mountain, doing everything in their power to encumber the pursuing dragon as they race towards the entrance to the Lonely Mountain. As Bilbo leads the dragon into the Gallery of the Kings, he is quickly overrun by Smaug, who deduces that Bilbo and the Dwarves were aided by the men of Lake-town, and leaves to destroy the town, and when Bilbo protests Smaug cruelly and gleefully tells him that now their deaths will be on their heads. As he is leaving, Thorin appears and taunts him, unveiling an enormous, freshly cast golden statue of a Dwarf, which distracts the greedy dragon long enough for the statue to melt into liquid gold and engulf him. However, Smaug survives the scalding gold and erupts from the molten pool, roaring that he will show the Dwarves what revenge really is. He then breaks through the walls of the mountain, shakes off his gold coating, and takes flight toward Lake-town. The film ends with him uttering "I am Fire, I am.....Death!" as he soars towards the unsuspecting town, leaving Bilbo and the others dumbstruck at the horror they have unleashed.
In the opening of the third film, The Hobbit: The Battle of the Five Armies, Smaug, after reaching Lake-town, proceeds to destroy the town for their part in aiding the Dwarves. Bard, having escaped imprisonment by the Master of Lake-town, climbs atop the bell tower and begins firing arrows at the dragon, though each attempt fails, harmlessly bouncing off Smaug's armor. Eventually, Bain, Bard's son, arrives to aid his father with a Black Arrow. Unfortunately, as Smaug flies over, he claws at the tower, toppling most of it. With the bell tower now half-destroyed, Bard is forced to make a makeshift crossbow using a rope that held the bell, some pieces of broken wood, and Bain as a stand. Smaug lands, and looks towards Bard, sneering at his attempts to stop him. Ignoring this, Bard notches the arrow, while Smaug charges him and his son. Bard looses his arrow, which hits Smaug straight in the chest, the shaft sinking into the missing scale. The dragon stumbles, knocking Bard and Bain off their perch, before flying back up. Clawing and biting at the sky, his internal glow fades as he dies in mid-air. Smaug's body, upon falling to the water, lands on Lake-town's corrupt master, killing him.
Even after his death, Smaug's influence is felt throughout the movie. Aside from the damage he inflicted on Lake-town, driving the residents to try and stay in Dale, as Thorin falls under the influence of the dragon sickness, Bilbo begins to hear him speak in Smaug's voice, and Thorin experiences a hallucination of Smaug while walking on the golden floor that they created while trying to 'drown' the dragon.
Smaug was considered the highlight of the second film of the series. with several critics hailing it as cinema's greatest dragon incarnation. Universal praise was also given to the visual effects company Weta Digital and the vocal and motion-capture performance of Cumberbatch for bringing a fully realized personality to Smaug.
The Extended Edition of The Desolation of Smaug confirms Gandalf the Grey's fears of Smaug being in league with Sauron as Thráin reveals in Dol Guldur. Should the Dragon have survived its attack upon Lake-town, then the Dark Lord would have used him to devastating effect against the Free Peoples in the North.

Personality
Smaug is malicious and cruel. He takes much more pleasure in psychologically tormenting Bilbo, making suggestions that Thorin was just using him, that flattery wouldn't keep him alive, choosing to spare Bilbo so that he can watch Lake-town burn and showing pleasure that Bilbo cares about the people of Lake-town, telling him that their deaths would be on his head, and sarcastically asking him how he would like to die. Smaug shows himself to be intensely sadistic, contemplating out loud that he would allow Bilbo Baggins to bring the Arkenstone to Thorin if only to watch the stone wreak havoc on Thorin's mind the way it did Thrór's. During his attack on Lake-town, Smaug goes out of his way to mock and sneer at Bard and Bain. He is also aware of the return of Sauron, and was apparently intent on joining forces with him (although there was some amount of confusion as to whether the dragon's motives for an alliance with Sauron were).
Though intrigued when encountering a hobbit for the first time, Smaug despised Dwarves intensely, seemingly considering them wretched and bottom-feeding creatures in spite of how they'd be naturally urged to come after his treasure (ironically, some of the unfavourable remarks he made about them could be used to describe himself, showing off the self-contradictory aspect of his personality); but he seemed to hold a grudge towards Thorin in particular, possibly in spite of suspecting the dwarf-prince's greed or knowing about his royal claim on the Lonely Mountain and its treasure. Smaug likewise upon realising the people of Lake-town had been in league with the Dwarves displayed a mix of hatred and paranoia towards them, in spite of viewing them as snivelling and wretched and in spite of their ancestors' usage of black arrows.
Smaug is extremely arrogant, and the mere implication that he may possess a weakness made him visibly angry; being insulted by Thorin was also quick to earn his anger. Smaug was supremely confident in his own powers, shown in his famous speech about how certain components of his body were weapons of destruction. He was utterly ruthless, completely capable of committing genocide in pursuit of his goals, but more likely for the sheer horrific pleasure of it. Due to his overwhelming hubris, Smaug clearly suffers from a superiority complex, believing himself to be King under the Mountain on account of how he had destroyed the original kings; Smaug's obsession with gold and his own possession of it would be startling enough for Bilbo to realise later when Thorin started to show the same kind of sickness.

Size
Smaug's size is twice as big as a Boeing 747, indicating each wing could be more than 60 to 70 meters in width. These indicate that Smaug ranged from 130 to 152 meters in length and from 120 to more than 140 meters in width.
Smaug is covered in dead and flaking skin like an old reptile, causing slight variations in his scales' colour, and facial scars from past battles - debatably the most noticeable scar in the finished film is one on the left side of his lower-jaw.

Appearance
The dragon has four limbs (two hind legs, and two bat-like forelimbs which act as legs/arms for crawling and as his wings); each of Smaug's winged forelimbs possessed six digits in total; a thumb, two taloned fingers separated from the wing membrane, and three long phalanges joined together by a bat-like wing membrane to form his wings.
Smaug's underbelly is heavily armored as the rest of him. The bare patch that Bilbo notices is a single missing scale, broken off during his attack on Dale, by one of the Black Arrows fired by Girion.


Trivia
-His fire is not magical, but 'fuel-based'.
-Smaug in the movie was somehow aware of Black Arrows with their proper noun. It is possible due to his recognizing them that he may have encountered the weapons at an unknown prior point in the film continuity or that he remembered their use against him in his attack on Dale.
-Smaug seems to have a will of dominance, as he was shown capable of forcing Bilbo into revealing himself.
-Gandalf wanted Smaug to be destroyed before the War of the Ring began, because, had Smaug allied with Sauron, it would have meant almost certain ruin for the Free Peoples; the forces of Rohan and Gondor would not have been able to bring him down without suffering enormous losses. This idea is reinforced in the extended version of An Unexpected Journey when Gandalf meets with the White Council at Rivendell, as he expresses concern at the possibility of Smaug allying with the new darkness, the Necromancer that Radagast had encountered (although Saruman dismisses this as nothing more than some human sorcerer playing with black magic rather than recognizing it as Sauron).
-The Extended Edition of The Desolation of Smaug confirms Gandalf's fear of Smaug and Sauron working together to conquer Middle-earth. This explains his vast knowledge of Sauron and the Ring, as he alludes in the theatrical version.
-It is possible that Smaug's taking of Erebor might have been encouraged by the steady return of Sauron. Gandalf carefully planned the Quest for the Lonely Mountain and the attack on Dol Guldur so as to prevent the two from assisting one another. Therefore, it can inferred that there might have been a possible (loose) connection between Smaug and Sauron, or that the Dragon was potentially open to taking the latter's side.]