Natasha made her way into the gym at seven in the morning, yawning and rubbing her eyes. She had forced Steve to watch Disney movies with her the night before, and the coffee pot was broken that morning. The sight before her in the gym, however, was more than enough to wake her up.

Steve was furiously punching a punching bag, topless and super sweaty. Natasha watched the muscles in his back and arms working until the bag broke and flew across the room. She hoped the arousal she felt wasn't visible as she spoke up.

"What did that poor punching bag do to you?" she said, startling him. She smirked and continued. "You know, those gray sweatpants are really working for you. So is the lack of a top. You're like a Greek god or something."

Steve blushed and said, "Erm—Thanks, Nat."

He picked up a new punching bag with ease, put it on the hook, and started punching again. Natasha just stood where she was, admiring him.

"Are you going to actually work out, or did you come here just to blush like an idiot?" Steve paused his punching and turned around, crossing his arms.

"I don't blush, Rogers."

"Really? Because you should see your face right now. Do you want me to go get you a mirror?"

"Oh, so we're playing this game," Natasha replied. When Steve smirked, she held eye contact with him and slowly lifted her tank top over her head. When that was gone, she stepped out of her sweatpants so that she was just in Nike Pros and a sports bra. She kept her eyes locked on his as she made her way over to the nearest treadmill. She broke eye contact when she got there as she turned it on and started running.

The next thing she knew, Steve was at the one next to hers, powering it on and immediately setting it to its highest setting. Natasha glared and bumped her speed up a bit to match his.

A few miles later, Steve turned off his treadmill and stepped off, a little breathless. Natasha, meanwhile, slammed her hand down on the power button, put her feet on the sides so that she wasn't moving, and hunched over.

"You know, standing up straight will help you breathe better," Steve said cockily.

"Fuck you, Rogers," Natasha responded harshly, holding her head up to look at him and glare.

Steve chuckled and said, "Oh, you wish you could fuck me."

Natasha's jaw dropped, but he didn't see it. He was too busy making his way over to the punching bag.

Steve had to turn away from Natasha quickly. Natasha's breathlessness and heaving chest was doing things to him that he didn't need Natasha to know about. It didn't help that she looked like she was staring right into his soul when she glared at him, her eyes darker than normal for some reason...He shook his head and started rewrapping his hands.

He didn't get very far when Natasha spoke up again.

"Wanna spar?"

He looked up and saw her walking towards him. She didn't give him time to answer as she took the tape from him and chucked it across the room, and then she grabbed his hand and pulled him over to the mat.

"Was that really necessary?" he asked, glancing over at the tape now lying against the wall it had hit.

"Yes," Natasha said, reaching the mat and dropping his hand. "Yes it was."

The next thing Steve knew, he was pinned underneath Natasha. Not a bad position to be in, he thought.

"I didn't know we were starting!" he cried. Natasha laughed.

"You always have to be prepared, soldier." They got up, and this time when Natasha made a move, Steve actually fought back.

Their match went on for several minutes, but even though Steve has an advantage in physical strength and stamina, Natasha was smaller, faster, and smarter than him. The match ended with Natasha wrapping her thighs around his face, taking him down, and then straddling his hips. Her hands were on either side of his arms and their faces inches from each other.

Natasha's eyes flickered down to his lips, but then she felt him and smirked.

"You know, I'd offer to help you with that," she punctuated "that" by grinding her hips into him once, making him groan (it was really more of a grunt), "but we have a meeting with Hill about a mission in a little bit."

Natasha pushed herself off of Steve, extremely glad that all outward signs of her arousal could be passed off as a side effect of working out. She noticed him trying to adjust himself to hide his boner out of the corner of her eye.

"Don't bother," she said. "Are you forgetting that I was literally on top of you a few seconds ago, grinding on you? Normally I'd be all for dry humping — or more — on the gym floor, but we have a meeting to get to in half an hour, and I would like a nice, long shower."

Steve blushed and opened his mouth to most likely stammer out an apology, but Natasha turned on her heel and started to leave. When she got to the door, however, she turned back around.

"But no, seriously, you should go take care of that before seeing Hill. I know I will," she added, nodding down towards her own crotch. She winked and left for real that time, leaving a slack-jawed Steve alone to deal with the implications of what she just said.

"It's a simple undercover recon mission," Hill said, handing Natasha a file. She opened it and started glancing over it. "You're posing as newlyweds. Get in, get information, get out. No need to fight, and you should be back by dinner."

"Newlyweds?" Steve asked.

"Yes, Steve," Natasha said, still immersed in the file. "Newlyweds are people who—"

"I know what newlyweds are," Steve snapped, and Natasha smirked. She closed the file and handed it to him.

"What? Scared to have to act like you can't keep your hands off me? Honestly, I get the feeling that you won't be acting with how you are around me sometimes," she teased, and the tips of Steve's ears turned bright red. "Right, snugglebear?"

"Natasha!" Steve groaned. He looked at Hill. "We aren't—"

"You're going to have to get used to her flirting with you if this is going to be a successful mission, Cap," Hill said with a smirk. Natasha looked smug.

"We can practice on the quinjet," Natasha said, standing up, grabbing his arm, and dragging him out of the room.

"P-practice?" Steve stammered. "Wait, Natasha! I haven't even read the file yet! Won't we need rings? We don't have any rings. And clothes! We need disguises and—"

"Relax," Natasha said, shifting so that she was next to him and dropping her hand down to his. She gave it a quick squeeze before she let go and started getting ahead of him again. "Everything's on the quinjet."

Hill was right. They were back and debriefed before a late dinner. As they sat with the team and had their occasional-which-is-now-starting-to-turn-into-every-day team dinner, Natasha thought back to the mission. More specifically, the kiss on the mission.

They were house hunting as newlyweds in a neighborhood their target was in. Once the tour was over, Steve and Natasha had to take a little "stroll" through the neighborhood. When they got to the target's house, there were neighbors also taking a walk, and they obviously just couldn't stand there and stare at the house before they went and snooped in it. That would be suspicious. So what did Natasha decide to do? She turned to Steve, grabbed his face with both of her hands, and brought his lips down to hers in a filthy kiss. It was definitely much filthier than needed, but it was an excuse to make out with him under the guise of something else. She wasn't going to let that pass, especially not after the gym that morning.

"Lady Natasha, are you okay?" Thor boomed, bringing her out of her reverie.

"What? Oh yeah. I'm fine," she said airily, taking a bite of her food.

"You look flushed," Bruce piped up.

"I'm fine," she repeated. "Actually, I think I'm gonna turn in now. I'm a little tired after that mission."

She got up and went to leave the room, but when everyone had turned back to their food, she caught Steve's eye and winked at him.

So what if she had to pull out her vibrator for the second time that day? That certainly wasn't her record, and she got to make out with Steve that day. It seemed like a pretty fantastic day for her.

AN: TWO UPDATES TODAY BECAUSE I THOUGHT ABOUT CLINT JUMPING IN THE VENTS AND I THOUGHT, "WOW IT'S JUST LIKE AMONG US!" SO I FINISHED THIS CHAPTER SUPER QUICKLY SO I COULD GET THIS OUT ASJSDGKJAGDFKJASGFKJGASD