"Padfoot, old friend," said James, "I need you to do me a big favor."
"Name it, Prongs." Sirius knew better than to promise his best friend anything without first hearing what it was.
"I need you to be best man at my wedding."
"What?" Sirius yelped. "No way! James, you son of a Skrewt! She said yes?!"
"She did," grinned James.
"How did you ever manage that one?"
"Well, the details will have to remain between me and Lily," said James smugly, "but we are certainly getting married. In about four months. So will you do it, Padfoot? Be my best man? Please."
"Absolutely," said Sirius, with a grin to match James's. "Nothing could make me happier. You know what being best man entails, don't you?"
"Yeah, it means you'll be wearing a suit and tie and looking respectable for once."
"Nooo ... it means I get to marry the bride if you somehow fail to show up."
Sirius whipped up his arm just in time to block a pillow, as James grabbed one and tried to hit him with it. He seized one for himself and dealt his friend a solid whack on the head, and in a moment feathers were flying everywhere.
"Don't – even – think it –" puffed James, in between swings.
"You'd better be on the lookout, Prongs," Sirius laughed, ducking. "You're going to have one hell of a stag night before the ceremony, just you wait and see."
"I'm inviting Remus too, you know," said James, dodging as Sirius aimed a blow at his side. "And Peter, of course. They'll keep you in line."
"Hah! Moony's going to be my reluctant accomplice, same as always." Sirius danced backward, using his pillow as a shield, and bumped into the table. He risked a glance behind him and James landed a thunderous pillow punch right in his stomach. "Oof! Okay, okay, truce, man! You win!" Sirius dropped his own pillow and held up his hands.
James tossed his pillow aside, laughing. "Isn't it amazing, Padfoot? She said yes! She said she'd marry me! I still can hardly believe it! I feel like I woke up this morning and the whole world was different somehow ... I'm engaged now!" His tone was filled with wonder, as if he could not believe his good luck. "I'm engaged to the most beautiful girl in the world ... Sirius, what did I ever do to deserve this?"
"Good question, mate. I've no idea. But why worry? You're Lily's problem now." Sirius mussed his friend's hair, not that it made much difference as James's hair was perpetually messy.
James laughed again, absolutely delighted.