A/N: Just a little warning, this is really really fluffy. Like, I almost made myself sick from the fluffiness when I read through it again. But, I liked the idea, so I'm ok with how it turned out. Fluff isn't bad from time to time. Hopefully you enjoy!

Prompt: (word) festive

Christmas Spirit

Sirius looked around at the newly decorated common room. Marlene had received a box of decorations from her mum that morning and had immediately set to putting them up. There were wreaths on every wall, stockings hung above the fireplace, strings of garland wrapped around the railings leading up to the dormitories and draped around the portrait hole, and sprigs of holly and mistletoe hanging here and there.

"It looks great, darling," he said, wrapping an arm around her. "Very festive."

"I'm glad you like it," she said, smiling up at him. Her gaze drifted to a spot above his head. "You know where you're standing, right?" Her eyes met his once more, sparkling in the light of the fire.

He didn't have to look up to know what was there. "I find myself under the mistletoe with the most beautiful girl in Hogwarts in my arms. What a terrible situation," he said sarcastically.

"I just ate," James chimed in. "I'd rather not see what my food looks like when it's partially digested, thanks."

"You know," Marlene said, pulling away from Sirius and kneeling in front of the box the decorations had come in, "I asked my mum for a very special decoration. It's just for you, James. Would you like to see it?"

James looked at her warily before approaching her. "Um, sure?" He looked to Sirius for some help. Sirius only shrugged, trying to keep a straight face. He'd caught a glimpse of what was in the box.

Marlene stood and placed felt reindeer antlers on James's head, the tiny gold bells attached to them tinkling. "Perfect," she said, smiling mischievously. James stared at her in shock. Sirius had the feeling that he hadn't expected that from Marlene.

Sirius grabbed her hand, still trying not to laugh. "We'd best run before he tries to kill you." He led her quickly out of the portrait hole, the antlers flying out at them just before the portrait swung closed. They laughed all the way down to the Great Hall, stopping just outside the entrance.

"Did you see his face?" Marlene said when she'd caught her breath again. "It was priceless!"

"He's going to get you back for that you know," Sirius said. "I told you he didn't like to be called a reindeer."

"I know, that's why I did it. That's what he gets for making comments like that. He obviously doesn't realize how sugary sweet he is when Lily's around."

"Oh yes, we were in the middle of something before he interrupted us," Sirius said. He tapped his chin thoughtfully. "I'm having trouble remembering though..."

"Well then, let me remind you." Marlene stood on her tiptoes and kissed him.

"I think I'm going to enjoy Christmas with you around," he said when she pulled away. "Especially if there's mistletoe involved."