A/N: Saw the Thor 2 preview. This popped into my head, for the loki-in-jail scene.
"When you betray me," Thor said clearly, "I will kill you. Believe that, Loki."
His brother rose slowly from his seat. Walked up to the glass. "Oh, I do," Loki said. "And I accept – on one condition."
Thor swallowed. "Name it."
"The list of people you have obliterated with Mjolnir is almost endless." Loki was quiet and unhesitating. "You kill them without a thought, and then later on as you clean your armor you wonder where the bits of skull and hair have come from. I don't want to join those inglorious ranks, Thor. When you kill me, I want you to remember it."
Thor frowned at him but did not know what to say. Loki went on. "I want you to do it with your bare hands," he said. "Around my neck. I want you to choke the life out of me with your own body. I swear I won't resist you. But I want to feel my death coming over me – and I want you to feel it too. Looking into my eyes. That, I think, you won't soon forget."
An even longer silence. Then, suddenly, he stepped back and flashed a wide grin. "Do we have a deal?"
"Loki..." Finally, Thor found his voice. "Brother, I don't understand..."
"You don't have to. Those are my wishes – and you will agree to them, or I won't take one step towards helping you. It's the end of my life, Thor, the last thing I will ever know. I think I'm entitled to have strong feelings about it."
Loki might be mad, but about this he was clearly in earnest. Thor palmed the lock and let the glass wall melt away. "Come here, brother."
Loki stepped forward, and did not resist when hands settled gently around his throat.
Thor shifted to find a grip that was comfortable. He applied pressure until the sound of Loki's breathing grew a little harsher, looking unblinking into Loki's eyes.
"Very well," he said after a moment. He let go and moved away. "I can and I will: I swear it."
If Loki was surprised, it did not show. "Good," he said lightly. "Then, let's get started." As they left the hall together he matched his stride to Thor's, as always. "And let's look on the bright side, brother: perhaps I'll keep faith with you, and you won't have to kill me at all."
Thor would not turn to look at him. "Perhaps."
The End.
For those of you curious about Family, new chapter is about half done and I'm planning to get it up this weekend.