Okay, so this is a request from an awesome person on here, Marina Ka Fai, a one-shot of a family fic between Jaime and Lancel. Enjoy!

Jaime rolled his eyes as he heard Robert shout for the breastplate stretcher and saw his coz, Lancel hurry out. He grabbed the boy by the arm as he hurried past the tent and stopped him. Lancel jumped and looked at him. "Ser Jaime."
"Hello Coz, looking for the breastplate stretcher?"
"His grace-" Jaime led him away from the tent by the arm.
"Is a drunken fool who likes to play tricks." He walked away with him. "We haven't spent much time together, you and I."

Lancel walked with him. "I must get back to his grace." Jaime sighed and stopped, before sitting down on a barrel.
"Oh please, he has dear old Ned with him. He will be fine." He winced a bit. "Get this armor off me, I've had it on all day." Lancel nodded and began taking it off. Jaime hissed a bit as his shoulder part was removed. Lancel looked at his shoulder.
"You're hurt."
"You can thank Robert for that. Fetch some warm wine." Jaime nodded his head to a flagon, which had been standing in the sun. Lancel did so, whilst Jaime removed his shirt. He took the wine and cloth, putting it on his shoulder. Jaime looked at Lancel.
"You can sit down you know." Lancel nodded and did so. Jaime closed his eyes for a moment, before looking at his cousin.

"Did I ever tell you about the mad king?" Lancel looked at him and Jaime was reminded how much they looked like each other for a moment.
"Everyone knows-"
"How I killed him, yes. But do you know why?" Lancel shook his head. Jaime dipped the cloth again and held it on the wound again.
"He had wildfire all over the city, everywhere... Robert came, and he said to burn them all. Burn them in their homes, burn them in their beds... My father arrived before and Aerys let him in. My father sacked the city, never one to pick a losing side. I begged the king, to surrender. You know what he said?"

Lancel shook his head silently, too wrapped up in the story to speak. Jaime continued.
"He told me to bring me my father's head if I wasn't a traitor. All the while, he kept screaming to burn them all. I had enough I suppose, I don't know. Maybe it was a moment of madness or clarity. I killed the pyromancers, then... As the king went to flee, I stabbed him in the back. He was still screaming to burn them all. I slit his throat and sat down on the chair his family had held for years."

Lancel gulped a bit. "Why haven't you told anyone?"
"Who would listen to an oathbreaker, kingslayer... A man without honor. The mad king is dead, his son is dead and his legacy lies across the narrow sea with a Dothraki hoard from what I heard. What difference would it make to the people of flea bottom to learn I had saved their father or grandfather?" Lancel frowned a bit and nodded.

Jaime stood and put his shirt back on Lancel caught sight of a scar running along Jaime's back. Jaime paused, seeing him look and then put the shirt back on, followed by the inner layer of the armor. "A last gift from the king. Help me with my armor, need to look my best after all." Lancel got up and began to put the breastplate and back plates back on.
"What happened?" Jaime looked at him and sighed a bit.
"A long story coz. The short one is a dragon tooth met my back." Lancel froze before he continued.

A while later, Jaime was outside of Robert's room, glaring at the space in front of him. He saw Lancel approaching with more wine. Lancel looked at him. Jaime looked back. "Thank you coz."
"For what?"

For a moment, Jaime's stony mask slipped and there was a man there, that had not been seen by many.
"For listening."