There will be a lot of differences in this fan-fiction... I think it qualifies as an AU. Most importantly; Joffrey will not exist and Cersei and Jaime will not have any sexual relations. Also, some events will happen at different times than in the books or show for a few reasons.
It was just another day. Ser Jaime Lannister and another member of the Kings Guard stood outside of the King's chambers - doing their job. Jaime Lannister was fortunate enough to be the Queen's brother, and the son of the most powerful man in Westeros, Lord Tywin. Any man with any sense knew that he was even more powerful, and definitely richer than the King himself, Robert Baratheon.
It was quite late in the morning when Queen Cersei appeared from the room, looking content. Before she'd been happily married to the King, she hardly ever looked like that, she'd always generally been quite versatile. That had changed, especially after she'd given King Robert twins - a boy and a girl, like she had been with Jaime. The joy continued when she'd given him two other children - two more boys.
"He was good to you wasn't he?" Jaime asked the usual question, he had always been overprotective of his much loved sister.
"Of course. You must stop worrying about me, dear brother. As my duty as your sister, I must tell you that you worry too much." She smiled.
He frowned slightly. He'd begun to notice the jealousy he had of his sister and her family. It almost angered him, he was brooding. He was a part of the king's guard. He didn't have time to couldn't deny though that he had started to notice the little things that Cersei shared with her family, and found himself wanting to be able to share that too.
Cersei noticed the frown, which was unusual of Jaime; he'd always keep the brave face.
"What ails you?"
"Nothing, nothing. I was given the message that Roslin asked for your assistance in her chambers as soon as you were available."
The sullen tone made Jaime's problem clear to Cersei, and she suddenly felt for him, because before Robert, it's what she had experienced herself.
"You long for a family." She stated, looking him in the eye.
Jaime stayed silent, but he knew that she was correct. "Gods,no. I'm a man. It's a woman's job to brood."
The Queen gave him a stern look - she was quite a strong woman. She counted herself as equal to men.
"It's only natural. Every man will at some point. It's the way of life."
"I couldn't anyway. I lead the King's Guard. I serve for life."
"I'll speak to the King. You should find someone Jaime. Father will be pleased. He's desperate for you to be his heir, and for you to produce one."
Jaime nodded, before shaking his head - shaking away the mood. He couldn't now, he was on duty.
"Now, I'll go and see to Roslin. Do let my husband know if he asks."
Roslin, the only girl born into the family, was the second eldest, but only by a few minutes. Her twin brother Lukas was the heir to the Iron Throne. He was an out-going child, he wasn't afraid to speak his mind, but he was compassionate, and could show mercy. He was well-liked through out the seven kingdoms. Both were fourteen years of age, and Cersei doted on them.
The third eldest, another boy, Petar who was a mere 11 years old was rather different. He kept to himself, he was very shy but very smart, especially for his age. He always seemed to have a book with him. The final child, a boy, aged 8 was Torren. He longed to be a knight, like his Uncle Jaime. He wanted to save damsels in distress and fight for the King. He loved play fighting, with wooden swords. He was a keen rider too, and even at the age of eight, he'd insist on going with his father on hunts.
He gave her a swift nod, before she walked off, her dress dragging on the floor behind her. In the next few days they headed north, to Winterfell. Jaime was dreading it. He hated the cold, and it was a long journey... a month's ride without a proper bed.
It was bad enough to think of it.
The king had ordered this not long after the murder of his previous hand, Jon Arryn. In a vicious attack, he'd been killed by a couple of outlaws. He needed a new hand, and the first person he'd thought of was his old friend, Eddard Stark.
"Do we have to go to Winterfell mother?" Lukas asked once again, sighing.
"Yes. It's polite. Your father wants to ask an old friend to be his new hand." Cersei explained, "Besides, Eddard Stark had a daughter a year younger than you. The most likely situation is that you'll be betrothed to her."
"Is she pretty?" He sat up in his chair, raising an eyebrow.
"I have not had the privilege of meeting her." Cersei answered.
"I am not marrying her if she's ugly. I can't be seen with a ugly Queen when I rule!"
"I am sure that the future Queen will not want to be seen with an ugly king!" Roslin threw at him, earning a glare.
"Shut up! We're twins. That means you're ugly too!" He retorted.
"Both of you, enough. Behave. If there is any of this in Winterfell you will stay in your rooms for the duration of the stay." Cersei threatened.
"I'm not ugly am I mother?" Roslin panicked, looking worried.
"Of course not, my love. You are the prettiest girl in the seven kingdoms."
The twins stuck their tongues out at each other one last time before Lukas left the room.
