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Castiel stands there, clutching the microphone in both hands as he looks at all the people who came for his and Dean’s wedding reception. He’s nervous, he’s never liked making public speeches. This time, though, he’s prepared. He stands up straighter, narrows his eyes when light shines brightly at him, and says, "I always looked at Dean like he was the sun."
The crowd awws.
He continues, "I hated him with the righteous fire of thousand suns, after all."
The silence that follows is one of surprise.
"That's true,” Gabriel, the best and worst best man, at the same time, pipes in. “He despised that bastard."
Cas glares at Gabriel because he's the only one who can talk like that about Dean. "Anyway. I hated him," he says and turns Dean. "No offence, my love."
Dean stares at Cas with tears in his eyes—from barely contained laughter and shakes his head. "None taken, babe."
Cas nods and looks back to the crowd. "However. The Dean everybody but me knew... somehow seeped into my life. With time, his light grew softer and less intrusive. And I saw how lovely it was.” He looks at Dean and smiles, smugly proud of himself that he’s slowly reducing Dean’s tears of laughter into ones of emotion.
Dean glares at his husband half-heartedly, fully aware that right this moment he’s losing the bet they have made before the ceremony. Dean vowed not to cry.
Castiel’s smile turns softer, then, and he stares at Dean like they’re the only two people in the room, “I looked at your light, and I haven’t stopped looking ever since."
In the end, nobody cares about the bet.