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Instinct and Nature by awhispycloud
Fandoms: Fullmetal Alchemist (Anime 2003), Fullmetal Alchemist - All Media Types
03 Oct 2023
Tags
Summary
At some point in the springtime, in the middle of a green field on a mission far away from Central, it hits Ed.
It has to be divine retribution, he decides, because at that exact moment, his vision spins, and he lurches forward. Al cries out in surprise, and he splays his massive leather-clad hand across the span of Ed’s back. Ed shudders violently at the contact, and hugs his arms around himself as he breaks into a cold sweat.
“Brother?!” Al asks, panicked and fearful. “What’s wrong!?”
Ed’s not sure, and he fucking hates it. All he knows is that his fever just got infinitely worse, something's causing shivers to run all over his body, he’s making pitiful noises against his will and there’s something wet sliding down his—oh.
Fuck.
—
“Brother, please,” Al says softly, sitting just a few centimeters away. “Tell me no and I’ll leave you alone, but I—I really want to help you feel better.”
Ed doesn’t reply to that. He doesn’t even think. Instead, he lets instinct and nature do what it intended, and spreads his legs.
(Or: Three different times Ed goes into heat, at three different points in time, with three different versions of the same person.)