This one is a prompt! Princess Prettypants asked for "Loki needs a hug, you should have a chapter where he gets hugged, especially tight by Thor." So that is what she'll get! 'Is chuffed about finally getting a prompt'.
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Past
Loki was sitting all by himself in his cell, cradling a cup of very nice tea Pepper had brought him, when there was movement at the door. He sighed. Different from what he would have expected, it was Thor, his... Not his brother, he firmly reminded himself.
Before he could think more closely about it, the norse god had stepped through the room and was hugging him very tightly, not whispering, though perhaps it could be counted so for his very loud - not - brother, as it did not deafen him. "You will always be a brother to me".
Present
Walking through his kitchen, yawning and pouring himself a bowl of cereal, Loki sighed. He might have all the power now, but he still felt as alone as ever. Worse, now, when he was not fighting for his survival.
As he sat down at the bar table with a jug of milk and his bowl, he was surprised by a glimpse of his brother, no; scratch that, his false brother, before a hand clapped him strongly on his shoulder. While no fan of Thor's sometimes painfully exuberant affections, Loki involuntarily found himself smiling, before swiftly quashing that expression. Very irritating and respectless, that was what this was. Yes. Mhmm. That's it.
Future
Shocked at first, Loki had tensed, but as he was not let go, he slowly closed his eyes and lowered his head slightly, leaning his forehead against his brother's shoulder, letting his own hands rest on the strong forearms of his brother. Yes, he felt better now. He did. And perhaps even... not quite so alone?