Alec doesn't need to spring from his chair and go in for a hug for Reid to understand he's happy. Emotions may, as a general rule, be subdued in Alec, but that doesn't mean he doesn't feel. Seeing him so upset over Magnus had been distressing not just because of the situation but because it'd spoken of the magnitude to which Alec had been hurt. Now, watching him try to find the right words, Reid knows it means something to him to be asked. That, beyond any kind of jumping or clapping or squealing, is what Reid had hoped for.

"I think a best man is supposed to wear the powder blue and pale pink suit we picked out for you because it matches our color scheme so well," Reid says, though it's too absurd a lie for him to keep a neutral expression for more than a couple seconds. He breaks into a grin, rolling his eyes at himself. "That was Luke's idea, by the way, he said I should throw something wild like saying you had to dress colorfully out there so you can blame him next time you see him."

He pauses to take a sip of his coffee, momentarily studying Alec from over the rim of his cup as his smile softens. "Thank you, though, really. It means a lot that you'd say yes. I have no doubt you'll be a fantastic best man."