A/N:
Harry Potter Halloween Collection Prompts: (food/drink) marshmallows
"Here you are, love." Sirius set a steaming mug of hot chocolate on the table in front of Marlene. He sat across from her, his hands wrapped around his own mug, soaking up the warmth.
Marlene stared at the light brown liquid, her brow furrowed. "You expect me to drink this?"
"Why not?" He took a sip from his mug. "It tastes fine to me."
"I'm sure it's fine," Marlene replied tartly. "Except that you've forgotten the marshmallows."
Sirius sighed. "Excuse me, madam. I forgot you won't drink hot chocolate without marshmallows." He got up and dug around in the pantry for a moment, finally finding the bag of tiny marshmallows. He set it down in front of her before sitting once more.
"That's more like it." She grinned as she took a few from the bag and placed them in the mug. She finally took a sip. "Perfect," she sighed.
"What difference do a few marshmallows make, anyway?"
"It just isn't hot chocolate without them. That's the rule." She put her hand in the middle of the table, palm down, and he covered it with his own.
"You're mental, you know that?"
"You're just irritated because I won the snowball war." She stuck her tongue out at him and giggled.
"You got lucky, McKinnon. Next time, you won't be able to touch me."
She downed the rest of her drink quickly and stood. "Challenge accepted."
"Right now?" He looked at her in amazement. "I just got warm again!" She ignored him, grabbing her coat off the hook by the door.
"Would you like to forfeit?" She looked over her shoulder at him, an eyebrow raised, smiling mischievously.
He finished his drink, slamming his mug back down on the table. "Not on your life. Loser makes more hot chocolate?"
"Deal." She reached for the door handle, pausing to look at him again. "Don't forget the marshmallows this time, loser."