For the Realm - Cover

For the Realm

Copyright© 2026 by Carlos Santiago

Chapter 7: The Weight of an Oath

Fan Fiction Sex Story: Chapter 7: The Weight of an Oath - Two years after Robert's Rebellion, three foreigners visit Tywin Lannister, Lord of Casterly Rock, during his breakfast and alter the course of history for the Seven Kingdoms.

Caution: This Fan Fiction Sex Story contains strong sexual content, including Ma/Fa   Blackmail   Coercion   Consensual   Reluctant   Romantic   Fan Fiction   Farming   Military   Mystery   War   Alternate History   Far Past   Magic   Cheating   Wimp Husband   RAAC   Polygamy/Polyamory   Cream Pie   Big Breasts   Politics   Prostitution   Revenge   Royalty   Slow   Violence  

“He did what?”

He had heard what his sister said, and for all of his training, breeding, and intellect, all Tywin Lannister could do was stare across the table at his sister.

At the very least, Genna had the good sense not to smile. For that peace of mind, Tywin let out a sigh of relief.

“Jon reacted as a Stark does,” she said. “He gave his word.”

Tywin withheld his temper by closing his closing right hand into a fist. He might have clenched his teeth and grimaced, but he knew that displaying his vexation would get him nothing.

The boy was eight years old. Eight, gods damn him!

He had spent the better part of a year teaching Jon Stark to think beyond the childish simplicity of honor that his uncle had given him. Tywin had taught him history, economics, warfare, reason, administration, and the logical nature of power.

The whole point of this education was to demonstrate to the boy that every decision carried consequences beyond the moment in which it was made. Could Aegon’s family have ruled the Seven Kingdoms for centuries? Yes! If the claims about the dragons were true, this could very easily come to pass.

However, not enough of that dynasty had taken succession seriously enough. They liked to think they were entitled to the power they were born into. When someone became lax, that was when mistakes were made, and that was how families fell. It only took one weak link to destroy a chain.

After all of that effort not to fall into that trap, Jon had thrown himself into the first political trap presented to him.

For a Frey girl.

“Did he understand what he was saying?” Tywin asked, pushing to know.

“Not entirely,” Genna replied, almost nervously.

That was new. Genna never got nervous.

“Then the matter is settled,” Tywin said. “We cannot bind this boy to an oath he made before he turned ten years old!”

Genna did not mean to contradict him, but she raised a hand.

“Is it, big brother?”

“Of course it is. No sensible lord would hold an eight-year-old boy to a marriage vow made after he defended a girl from a few indiscrete boys.”

“We both know that Walder Frey is not a sensible lord.”

Tywin paused.

Genna had him there.

“No ... he is not sensible,” Tywin conceded. “The man is a lecher, a miser, an opportunist, and possibly insane, so you might be right ... I have no doubt he is capable of hearing a child’s declaration and deciding it is the foundation of a marriage alliance somehow.”

Tywin looked down shaking his head.

“How could the boy be so stupid?”

“Those boys were picking on her,” Genna said as if that made everything all right. “It’s ingrained in him to do the honorable thing. For Jon, regardless of what you teach him, Tywin, he sees this as right and good.”

“I am aware,” Tywin found himself saying coldly.

“Then perhaps you should focus your anger with them rather than Jon.”

“I am angry with all of them, sister,” Tywin said.

Genna did not smile; she had the sense not to challenge his thought process.

“Jon did what he was taught to do by the Starks. No matter how much you want to change him, Tywin, you cannot make a wolf change its fur.”

Tywin found his facial expression hardening into a grimace. He had spent a year trying to teach the boy that the world was not governed by stories and drivel about knights and honor. A knight was a sword that was an extension of a lord. Kings did not rule because they were good. Lords did not prosper because they were honorable.

Men won battles because they understood the strengths and weaknesses of those around them. Superstitions like gods and supernatural forces were a joke. The idea of nobility winning the day was useless nonsense. It was as helpful as the notion that the common-folk had about Tywin himself.

They said he ‘shit gold’ when he was simply more productive with what he had.

Nevertheless, Jon had found one principle he refused to surrender regardless of what Tywin taught him: His word.

“Regardless of what is prudent, Walder Frey will hold him to his vow if he gets the chance,” Tywin said. “He will not care that Jon is a child, only that he is an eligible Stark, and all of the opportunity that accompanies him.”

“Much like you, then?” Genna asked, leaning on the table. Tywin had no answer, so she went on. “What will you do, then?”

Tywin was silent because his sister was right. While she had no idea about the dragon-connection, there really was no changing a wolf’s fur. He could teach Jon logic, history, tactics, economics, and politics, but in the end, no matter the foolishness of allowing sentiment to dictate policy, Tywin Lannister could not turn a Stark into a Lannister.

As such, he let out a sigh and decided to pivot. One could not win a war by simply battering away at a front door. If one piece of the plan did not work, then it was best to go elsewhere for success.

“This girl? The one you call Fat Walda,” Tywin said. “Does she have any potential?”

“Well, she is a Frey,” Genna replied, lip twitching. “Unless she decides to become a Lannister overnight, I doubt she will suddenly develop the qualities that would make her a remarkable bride by your standards.”

“You have a thought. Do you not?” Tywin asked, frowning.

“I have an idea, yes,” Genna said.

“That sentence does not bring me comfort,” Tywin remarked through narrowing eyes.

Genna ignored him.

“If Jon is serious about keeping his vow, then perhaps there is a way to make the arrangement useful. We work with what we have, not always with what we want,” she said.

“I have no intention of allowing an eight-year-old’s declaration to determine the next decade of his life.”

“Then don’t,” Genna replied swiftly and concisely.

Tywin stared at her, confused.

“Cersei’s daughter was your intention for Jon; was it not?”

“Yes,” Tywin said slowly with a nod to continue.

“She may prove to be a better match when the girl is older. Myrcella is a Baratheon princess and a Lannister, so I believe that would suit your tastes.”

“Exactly the point, Genna. If Jon continues along the path I have set for him, he will be an excellent prospect for Myrcella, and he could prove to be a worthy Hand of the King for a time.”

“Then keep his options open,” Genna said. “If the time comes when he must marry Walda because his honor demands it, you can decide then. However, he won’t be eligible until he’s fourteen, but knowing the Starks, they will want him to marry at sixteen or even eighteen. That gives you time, Tywin. From there, Walder might ship his granddaughter off somewhere else, or perhaps, Myrcella will not take a liking to him.”

Tywin considered her words. Despite how intelligent they were presented, he disliked the proposal involved his pet dragon with a common Frey girl.

More than that, he disliked that his carefully constructed plans had been disrupted by an eight-year-old boy who had decided that a promise made in a training yard mattered more than political calculation.

Was the boy so blind and foolish? Of course he was. He was eight. Nevertheless, impatience only favored the witless or the one taking advantage of the unwise, and for that alone, Genna’s suggestion had merit.

“If it proves necessary,” Tywin said slowly, “and Jon must marry the girl because of his honor, then I will consider your idea. You should prepare as the time comes nearer at hand in case we do need this Frey girl.”

“That you listened is all I ask, Tywin,” she said. “I will keep an eye on the girl.”

Tywin found himself harrumphing at the notion.

“You should be grateful I have not had the boy thrown into the stocks and allowed the peasants to pelt him with rotten fruit.”

Genna laughed.

“You would never do that.”

Tywin frowned.

“Oh? And why would I not?”

“Because Jon is your last chance,” Genna remarked quickly.

“At what?”

“At having a son who doesn’t disappoint you.”

With such a declaration, she rose from the table.

Tywin said nothing.

Genna walked toward the door, leaving her brother alone with the fire, the wine, and the thoughts he would never have admitted aloud.

A son.

Tywin looked toward the corridor where, somewhere beyond the walls of these damned towers, Jon Stark slept.

Jaime had disappointed him when he became a member of the king’s guard.

Tyrion was the worst reminder of every failing a Lannister could have; he was a drunken little lech of a toad that could not control his base instincts. By every measurement possible, he was a catastrophe of a failure.

Even Cersei, for all her lauded beauty and personal ambition, had become a source of complications he had never anticipated.

But Jon—

As he thought, he was a Stark boy in name and temperament despite his Targaryen lineage. He was a political asset and potential ally in the years and wars to come. He would be a lesser lord and a weapon.

Tywin had called him all of those things and more when he was by himself. And yet, as he sat alone, he found himself considering Genna’s words. A son who did not disappoint him.

Tywin stared into the fire. He had never considered thinking of Jon in such a manner. Nevertheless, this problematic observation had a nugget of truth in it.

He realized, with no small measure of irritation, that somewhere along the road from Casterly Rock to the Twins, Jon Stark or Aegon Targaryen, Sixth of his name, had begun to feel like the heir life had denied Tywin.


Catelyn had expected the evening to be difficult.

The negotiations with Lord Walder had been tiresome, the food at the Twins was worse than she remembered, and her brother had spent most of the day trying to appear more confident than what he was capable of being.

Still, dinner with Edmure was preferable to another conversation with the Lord of the Twins. Walder Frey could test the patience of the most humble septon.

Despite how stressed she was, Edmure seemed to have a smile on his face all evening long. When she had barely finished her wine, Edmure began laughing.

Catelyn looked at him.

“What is so amusing?”

“Don’t you know about what’s happened with Jon?” Edmure asked.

“Jon?” Cat wondered.

Edmure nodded, struggling to contain himself, which was the definition of unbecoming.

“Apparently, the boy has gotten himself into quite the predicament.”

Catelyn placed her cup upon the table, and she gave her brother a look so stern that he was warned of the danger of not answering her.

“What predicament?”

Edmure leaned forward.

“Three boys were bullying one of the Frey girls. Jon was witness to this poor behavior and decided to play the knight.”

Catelyn’s brow furrowed.

“Which girl?”

“Some girl called Fat Walda, I believe.”

Catelyn’s expression changed at the insult, yet she recalled a happy chubby faced girl from earlier.

“That is a cruel name.”

Edmure shrugged.

“The Freys have never been particularly kind to one another. The only people they are worse to is outsiders, as you well know.”

“That does not explain why Jon is involved,” Cat said, annoyed by this story.

“Jon defended her and bloodied his nose for the trouble.”

Despite herself, Catelyn felt admiration stir within her. Jon had always been a stubborn boy, but he was a well-behaved child.

He had always been too willing to defend those he believed were being treated unfairly, especially since (as far as he knew) he was a born-bastard. That sense of justice could prove to be troublesome; after all, to her, such a quality made him like Eddard.

She remembered Robb and Jon playing together. She remembered them running through Winterfell. She remembered Jon standing beside her trueborn son, as though the two were brothers without distinction.

Shaking her head, Cat thought of how cruel she had been for sending him away.

“Apparently,” Edmure continued, “the girl thanked him for being her knight, and then Jon told her that if she could not leave the Twins until she was married, then he would marry her.”

Catelyn stared at him.

“Excuse me!”

“Oh yes,” Edmure said, through weak laughs. “He swore on the gods, old and new, and apparently on the people of Westeros, high and low.

“He’s eight!” Catelyn shouted, affronted.

“Eight years old and already making marriage vows,” Edmure said.

“This is not funny, Edmure. You cannot mean to tell me you think this is serious,” Cat said.

“I do not know. It sounded very serious. I heard Walder Frey means to make a marriage pact with Tywin or your husband, whichever is amenable.”

Catelyn looked down at her hands, and she thought of Jon. The secret and his true parentage, coupled with the years of deception, were all thrown away for the image of a little boy.

She had spent years telling herself that sending him away was best for everyone. Best for Robb. Best for her children. Best for the North.

Yet now, hearing what he had done, she wondered if she had made a mistake in her own selfishness. If Jon could still be such a good young man after everything she had denied him, what might he have become if she had simply loved him?

Catelyn reached for her wine.

She did not drink.

“Edmure.”

“Yes?”

“I will want to speak to the Late Lord Frey before your meeting with him, and I am sorry for any problems it causes.”


The next morning came quickly enough. Lord Walder Frey invited Tywin Lannister to share in the breaking of their fasts.

Tywin accepted because refusing would have been needlessly insulting, but that did not mean he enjoyed the privilege he was given.

Much still needed to be done and economic negotiations were the definition of tedious. A problem existed though. If Tywin did not do this exchange, money would go to another portion of Westeros, increasing the influence and power of another family. Then, their authority could challenge his.

What was the acquisition of wealth if not prudence mixing with preparation for war? Whomever had the most had the largest advantage at the start of a conflict. The person that utilized their assets in soldier, armor, weapons, and formation would then win the battles ahead.

This all started with commerce, so boring as it might be, Tywin paid attention.

The meal was served in one of the larger chambers of the Twins, with the long table set beneath banners bearing the Frey arms. Tywin sat across from the old lord. Servants brought bread, eggs, salted meats of some kind that Tywin did not recognize, and enough wine to drown a small village.

Walder ate as though he had not seen food in a week.

Tywin found the sight distasteful, so he had a modest plate of food and poured himself some wine but asked the servant if there was any chilled, honey-milk or maybe some cold Northern beer.

“Does my meal displease you.”

“I would rather like to know why you have brought me here,” Tywin said, cutting into his meal. “I assume that you have not invited me to discuss the quality of the meal.”

Walder laughed.

“Always straight to business, Lord Tywin. You always were this way.”

Tywin did not dignify him with a response. Rather, he allowed the silence to allow Walder to keep speaking rather than be uncomfortable.

“You think I have been charging too much for the tolls.”

“Obviously,” Tywin said drolly, cutting into his meat. “You’re turning necessary trade into extravagence, and I will not allow that.”

“High talk from a man whose fleet has been burnt.”

“I would offer caution as to what you say next, Lord Frey,” Tywin said slowly.

“Oh yes! You’re nice and safe as long as you’re a guest in my home,” Walder retorted. “Despite knowing how much you loath me, Lord Tywin, and how much you find my tolls to be a problem, here you are.”

“Your bridge is a necessity for now,” Tywin countered. “The lords and merchants pay your fines because of this fact, but you know as well as I do that you exist out of convenience, not necessity, Walder Frey. If you disrupt my goods, I will simply not use your crossing.”

“Spoken like a lion, making sure to threaten me while also showing you, the great Lord Tywin, have the upper hand,” Walder said with a laugh. He sipped from his goblet and went on. “My Twins are useful enough that the other high and mighty lords will pay for the pleasure, no matter how much they look down at me and complain about the price.”

“That may work for them,” Tywin said. “But this current arrangement is unacceptable for the Lannisters.”

“You Lannisters do like to think everything has a price,” Walder said with a laugh. “And maybe it does, and maybe you coming here is a sign of that. Very well.”

“Very well?” Tywin asked.

“I will return Lannister goods back to the previous price,” Walder said.

“What then? This whole event was for theatrics?” Tywin wondered. “We both know I do not enjoy my time being wasted.”

“Certain events have occurred under my roof that changes things. I believe that the Stark boy with you made a vow, and like any little wolf, he is likened to keep his word.”

Tywin almost laughed. A Frey could not help themselves, Walder most of all. When he had an advantage, he wished to press it, or else he would be afraid to lose it altogether.

Such was the foolishness of the Freys. This fact, accompanied by the Late Lord Frey’s impatience, told Tywin all he needed to about the situation.

“What of him?”

“I do believe that I have heard he’s promised himself to my granddaughter.”

“Children make foolish promises,” Tywin said, putting down his eating utensils.

“Perhaps,” Walder conceded. “But I do believe Stark men are made of sterner stuff and keep their promises.”

Tywin said nothing for a moment.

“The boy is eight years old. He is not a man-grown. You cannot expect him to take such a proposal seriously when he has not spoken with his own father on the matter.”

“Nevertheless, if the boy keeps his word,” Walder said, “I would be willing to offer her weight in silver.”

For one moment, Tywin simply stared at him. The absurdity of the circumstances broke all of his decorum.

The laugh that exited his maw was a quiet sound without a single morsel of humor in its reverberation.

“You mistake the situation, Lord Walder.”

“Do I?”

“You cannot purchase a Stark with silver, especially while he wards with me.”

“Purchase? What a dirty word, Lord Tywin. I mean to reward him for such a vow.”

“You are offering silver for the marriage of a boy I have spent time educating, and I would sooner feed him to the sea itself than allow him to be forced into a marriage simply because he righted a wrong in your home.”

Walder did not reply right away. For a moment, he seemed like he might turn irate, but then, he simply shrugged before nodding.

“I do believe offering Fat Walda’s weight in silver would be a valuable gift to a boy learning commerce from the great Tywin Lannister.”

“Flatter as you might, I would sooner offer him my granddaughter, a knighthood, and my granddaughter’s weight in gold to prevent him from entering into a union with your family.”

Walder’s smile faded, and a frown replaced it.

Tywin lifted his wine since no beer came.

“Are you saying my granddaughter is worth less than a Lannister?”

“I am saying that I would offer more than you, Lord Walder, and as you know a Lannister always pays their debts.”

The old lord leaned forward.

“Then I will offer her weight in gold as well as her weight in silver!”

Tywin’s eyes narrowed at the contest occurring in the moment.

“Regardless of what you would or would not offer,” Tywin said, implying poverty through skepticism. “Jon is my ward, not my son. The person you would need to convince would be Lord Eddard Stark. Seeing as Jon is my ward and fostering at Casterly Rock, which of us would he be more likely to win over the Warden of the North?”

Walder’s smile did not return. He looked at Tywin as though he were his greatest enemy.

 
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