tony/pepper celebratory kiss
Pepper punched her code into the keypad outside Tony's workshop. "Tony? Tony are you down here?"
"No, Tony's not here, go away," he replied.
His voice was coming from what looked like a pile of junk, and Pepper rolled her eyes. "Tony, you've been down here for more than 72 hours and I need your signature."
"You can sign it, Pep, I'm in the middle of something-- AH HAH!" he crowed, straightening up and beaming at her. His face was liberally streaked with what she assumed was engine grease and his hair stuck up haphazardly from him repeatedly running his fingers through it. "I did it! Pep, come here, come here," he said, circling the table to grab her arm and drag her bodily to whatever it is that he'd been working on. "Okay, watch," he said, and flipped a switch.
At his command, seven tiny explosions went off around the room, and Pepper ducked, covering her head with her hands and the leather folder she'd brought down with paperwork for Tony. "Tony!" she yelled, "what was that?"
Tony grinned at her and pulled her in to kiss her soundly on the lips. He pulled back, his maniacal grin still in place, now smeared with her lipstick. "That, Miss Potts, is the preliminary guidance system for a new type of missile, one with multiple detonation sites that will all explode simultaneously. I call it the Jericho Missile."
Pepper pursed her lips. "Don't do that again."
"What?" Tony asked, all faux-innocence. "The kiss or the explosions?"
"Both," she answered sharply. "Now, I need your signature, Mr. Stark."
Tony winked at her and took the pen she was holding out. "Of course, Miss Potts. Anything for you."