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This story is rated M from now on. Nothing really graphic but I thought I'd give you a little heads up.

Chapter 5

Steve had been on another mission for a week and came right to her apartment after the debriefing. The day started with a fossil joke, then they were dancing to Jazz music and then...and then they ended up in her bedroom and she slept with him. He hadn't been a virgin like his psychological profile suspected but he was very inexperienced and eager to learn new things. He confessed that he hadn't have sex since he got the serum and feared that he would hurt her with his strength and size (she thought he was a bit exaggerating like most guys were when it came to that topic but boy he was telling the truth, the serum truly enhanced everything). It did hurt when he pushed inside her but he kissed her temple and waited for her to get used to his size and from that moment on everything was just a blur of kissing, touching and thrusting. Steve stayed the night and they gave into each other again and again (other men would go green with envy if they knew about his stamina) and then he made her breakfast in bed. The whole night and the morning after were perfect and she couldn't stop smiling when he stole kisses between every other bite. She let him take her under the shower again before he had to leave for a meeting at SHIELD.

It only dawned on her what she had done when she was changing the sheets of her bed after Steve left. She had sex with him. She crossed the final line. She had slept with the target she was supposed to protect. God, if Fury somehow found out, he would definitely send her back to Russia. Steve didn't even know she was from there. She knew that sex meant something to him and yet she let him sleep with her even though their whole relationship was a lie. She had failed. She had failed her mission, Fury and Steve. Disgusted with herself she ran to her bathroom to throw up. What was Steve doing to her that made her forget her training and everything that made her the Black Widow? Fury had chosen her because she was the best in her field and then this job turned her into a complete moron. Fuck Fury for giving her this mission and fuck Steve for making her want and like him so much! She did fuck Steve but that was besides the point. Maybe she should let the SHIELD shrinks take a look at her. Maybe she had the Captain America syndrome and was insane.

She met Steve later that day at a cafe after her "shift" and he was already there when she arrived. They found a quiet corner and Steve tried for the first time quiche Lorraine.

He looked serious when they were done eating and waiting for their desert. "I'm invited to a ball at the White House." Oh no, was he going to ask her to be his date? "The press will be there...I want you to know that I want to ask you to go with me but with the press being there and if the public knows about you...I don't want to put a target on your back."

She didn't sigh in relief but she wanted to. There would have been no way to go to that event without her cover getting blown and she couldn't come up with a convincing excuse why she couldn't go. Clearly the hospital would have given her the day off to meet the President. "It's okay. I understand, don't worry."

"I'm still sorry that I can't take you with me to those events. But it's just too dangerous. My job is dangerous and people could use you to get to me." He smiled at her sheepishly. "I would love to see you in a ball gown though."

He was so kind and thoughtful and she was a liar and an asshole. For the first time she wanted to blow her cover but she didn't want to lose Steve. "Maybe there will be another chance for you to see me in a gown. I look good in one."

"Oh, I bet you do."

Back at their apartment complex she followed Steve to his place and showed him how good she looked in one of his shirts after he worshiped her body. She was leaning against the headboard with his head in her lap and brushed her fingers through his blond hair.

"Natalie?"

"Hm?"

"You might think it's old-fashioned and outdated but it was custom back in the day and I actually never asked someone this before." He looked up at her with his pretty blue eyes. "Will you be my girl?"

Her heart was fluttering in her chest while her mind was screaming at her to end this right now. She knew that she would hurt him so much when the truth came out but like always when it came to Steve the fuzzy feeling he gave her was stronger than any reason. "Yes."

He leaned up to kiss her. "You don't know how happy that makes me."

And as it turned out Steve really liked it that she kept his shirt on when she moved on top of him to celebrate this new step in their relationship.

Steve didn't get called in during the following week and when he wasn't at the Triskelion for meetings or training he was with her,eating take out, drawing her or sleeping with her. It was like heaven. She had told him that she was reducing overtime so she could spend time with him.

Stev left to go to Sam's VA group to talk about his PTSD, so far he hadn't had any episodes when he was with her but he was scared that he could hurt her. He didn't know that she could take him if she had to but she was touched that her safety was his priority, she knew that he didn't like to talk about his mental problems. She was still in Steve's bed wrapped in the blankets when her phone buzzed with a text. It was from Clint.

You should follow Rogers the next time he leaves and it's not for SHIELD. He DEFINITELY has a girl! He's in a really great mood when he's here and a guy is only like that when he gets laid. You have to find out who she is and if she could be a threat to him. Or SHIELD.

Fuck! Fuck! What was she supposed to do? Write back that she's the reason why Steve was in such a good mood?

You're such a romantic, Barton! Did you tell Fury about your theory?

God, no! I ain't no snitch! I just told you so you can make sure that the girl's not just banging him to get famous or to kill him.

She wasn't planning to do either of these things. She just wanted to be with him and protect him.

I'll see what I can find out.

She deleted their conversation and got out of bed. She couldn't just tell Steve that he should stop walking around SHIELD parading that he was getting it on the regular. She didn't think that he would tell any of their co-workers that he was dating his neighbor but she still got worried that they could get caught. Well, that she could get caught and Fury would send her back to Putin with a bow on her head. She knew that fucker wanted her dead.

Steve came back an hour later when she was sitting on his couch reading the news on her phone. "Hey, how was it at the VA?"

He sat down beside her and kissed her. "Good. I still have problems to talk about it but just listening and knowing that I'm not the only one helps."

She wished she could tell him about her own demons. "That's good. I'm glad it's helping you to get better."

"Thanks, doll." He kissed her again, this time deeper and with tongue. He had started calling her doll after they officially became a couple. She liked the nickname and she was sure that only Steve could use it without it being patronizing. She would kill anyone who would call her doll besides him.

His hand slipped under her dress but she stopped him thinking about what Clint wrote her. "You wanna do something? Enjoy the last summer days with a tour on your bike?"

Lesser men would have been upset that she wouldn't let them get under her skirt but of course Steve wasn't. "Sounds great. We can have a picnic somewhere."

She quickly got to her place to change into pants and spent the day with Steve at a national park outside DC. Her self-imposed celibacy only lasted until they got back and she dragged him by the collar of his leather jacket into her apartment. Really no one could expect from her to resist a leather jacket wearing super soldier with hair tousled from the wind because that man didn't wear a helmet. She was only human after all.

The Pentagon had asked Steve to spend time with the troops and he was in in the Middle East for the next two weeks visiting army bases in Iraq, Afghanistan and Kuwait. SHIELD sent her in the meantime to deal with Murdock and his new friends in New York who got on the agency's radar. She had no idea what kind of mess Matt got himself into but she ended up helping them with weird and mystical ninjas. After she dealt with with that nonsense she did a little shopping spree and bought new lingerie she couldn't wait to show Steve . He'd probably say it was because he had the eye of an artist but she could tell that he really enjoyed it when she wore nice underwear.

She got back before Steve and dropped of her report on Coulson's desk and drove home. Steve came back a day later and was a big fan of what she had bought for him. He was especially into her stockings and garter belt and bashfully asked her to leave them on. How could she turn down him when he looked at her with awe and admiration in his eyes?

They spent his free days doing things with Sam (he was the only one who knew they were together), then she found a Jazz club and took him dancing , they explored Maryland with his bike, went to restaurants offering food Steve hadn't tried yet and he drew pictures on her naked skin after they slept together. She was happy and she never wanted this between them to end. For the first time she felt carefree and at peace.

They were in his bed, their fingers laced together above her head and Steve was moving in and out of her. He pressed her down with his weight into the mattress but she didn't mind. They were both panting and moaning and smiling between kisses. Sex with Steve was so different than anything she experienced before. She never smiled during it or felt so dizzy before him. Sex had always been about power or a tool or at best it had been a stress relief but with Steve...With him it was so much more. It was intimate and perfect. And it felt so fucking good. She wrapped her legs around his waist and he slipped in deeper and grunted against her lips.

"More." She moaned and his thrusts grew deeper and stronger. Their kisses got sloppy but they kept kissing until he pressed down hard on her and she was gone taking him with her. She gripped his hands so hard she was sure that she left crescents with her nails on his hands.

He smiled down at her after they caught their breaths and kissed the tip of her nose. "My beautiful girl."

She giggled (before Steve she didn't even know that she could make that sound) and wrinkled her nose.

"You're cute when you do that."

"I'm not cute, Rogers!"

He pecked her lips. "Yes, you are. The cutest." He pulled out of her and kissed her face. "How about I make us some sandwiches and then we start the Harry Potter marathon."

"Sounds like a plan." She wrapped her arms around his neck and kissed him deeply. He smiled against her lips and moved his head to her neck. She wouldn't say no to a second round but her stomach betrayed her and growled.

Steve laughed against her skin. "Okay, time to get some food into you." He kissed her lips again and suddenly there was a knock on the door. He groaned and got out of bed. "I'll get rid of whoever that is and then I'll make you something to eat, doll."

She wrapped the sheets around her naked body, the sweat on her skin had cooled down and she was cold without Steve's body heat. "Okay, I'll wait here."

Steve smiled, got into boxer shorts and walked out of the bedroom. She was smiling to herself thinking that they should just spend the rest of the night in his bed having sex after they had eaten something. They could still watch Harry Potter another time. She arched her back and glanced at his nightstand. She had given him one of these new Polaroid cameras and since she was his favorite motive he had only Polaroids of her in the photo holder on his bedside table, some of them were even a bit sexy. She bit her lip and looked for his camera. She should take a nude photo and hide it in his room so he could stumble over it. She looked at Steve's shield on the wall, maybe she could pose with it...

"Hey, Cap."

She froze on the spot. It was Clint's voice that she was hearing in the background. Fuck! What was he doing here?!

"I was in the neighborhood and thought I'd drop by. You wanna get some beers?"

"Um...Sorry, but I already got plans." She knew that Steve was blushing.

"Oh, I get it." Clint laughed. "You got a lady in there or do you always run around only in your underwear?"

"Uh-"

"Don't sweat it. Have fun and I'll see you at work. Bye, Rogers."

"Bye, Barton."

She sighed in relief. That had been close! Her phone on Steve's nightstand vibrated and she absently picked it up. She dropped it when she read the text.

I know that you are at Cap's apartment right now and that you are the one who's fucking him. Meet me in an hour at Joe's. WE HAVE TO FUCKING TALK!