A/N: Because everyone mentions Budapest with this couple, but no one seems to have written a fic for it yet. So, here's my stab at... wait for it... What Happened in Budapest. Dum dum duuuum.

:D

Budapest

Chapter 1

When Clint strolled into the briefing, he was fifteen minutes late and had a smear of lipstick on the corner of his mouth. Natasha did a double-take and barely refrained from rolling her eyes. This was getting ridiculous.

He took a seat and leaned back in his chair as Fury folded his arms, "So nice of you to join us, Agent Barton."

"Nice to be here," he replied amiably, smirking. Natasha felt her irritation grow. She was happy he had a girlfriend, but there was a time and place.

Fury shook his head in disapproval, but wisely decided to move on with the briefing. He tapped the screen behind him, and a large picture of an old warehouse appeared. "This is Budapest."

"It's changed since I was last there," Clint said, glancing at Natasha in amusement. She didn't return his humor. Instead, she raised an eyebrow and scratched the corner of her lip. He blinked and felt the spot, glancing at the lipstick on his finger. He wiped the rest off and turned back to Fury, who was looking at them gravely.

"This is no laughing matter, agents," he said, even though Natasha hadn't uttered a word. "What we have here is a potential nuclear crisis. We need to ensure that we won't have to take extreme measures to prevent war."

"What are we looking for?" Natasha asked, leaning against the conference table.

Fury turned back to the screen and tapped a few more times, showing grainy footage of long, cylindrical tubes. Clint straightened, brows furrowing. Natasha understood his concern; those were early-stage nuclear bombs. If this intel was accurate, there could be a big problem.

"We captured these images two days ago, in the shipyard by Petroleum Street, District 21 of Budapest. They were moved inside shortly after. Now we need you two to infiltrate the warehouse by any means necessary and confirm these weapons," Fury said.

Clint nodded shortly, lips pursed in a thin line. Finally, he was taking this seriously. "How are we getting there?"

"I have a plane ready and waiting. Pack your things and report up top," Director Fury handed each of the agents a folder thick with extra information. Clint flipped his open and started scanning the contents, but Natasha didn't move towards hers.

"And if they are nuclear weapons?" she asked, frowning.

Fury stopped short of the door and glanced at them again, his tone grim, "Those weapons cannot be used against the general public. Do what you do best." Without another word, he strode from the room.

Clint rotated his shoulder, stretching his arms as if preparing for a sparring match, "How should we infiltrate?"

Natasha opened her folder and skimmed the first page, her eye catching the proposed enemy—Paradigma. She snorted. A paradigm was a model, an example. They probably thought they were quite clever.

"We need to check their security, but time isn't exactly on our side," she said carefully, considering the intel before her with a practiced eye.

"In-And-Out, you think?"

"Maybe. Or a General's Daughter."

"Nice," Clint smirked, and this time she returned the expression. He slid his folder under his arm and headed towards the door. "All right. Let's go to Budapest."

A/N: This will be a multi-chapter fic (obviously). I'm trying my hand at suspense, so you all should let me know how I do. :)