AN: Well here is an edited version and hopefully the start of more writing!
Steve was furious. He was hurting, not physically, no he could take physically. He felt like his heart was torn out, his wife had, if what Tony said was right, slept with at least him. He was also worried that she might be with that Barton guy. Steve felt rage and sadness unlike anything he had ever felt before, so he did the only thing that could help him release it. He swung another punch at his latest victim, another punching bag, which flew across the small gym on the helecarrier. Working out his anger on a punching bag wasn't a new thing for him. He had done it during the War, so often that Bucky had started to change out the bags with tree trunks so he would stop destroying the few bags that they had.
He was so deep in thought that he didn't hear the door open, as Natasha walked in and locked the door behind her. She stood there watching as Steve either ignored her or not even notice her. She watched his muscles flexing and moving and she could feel herself getting a little hot and bothered remembering all the times she had felt those muscles. She shoved those emotions away, for the moment she had to fix things with her husband. He was still hitting this bag, and had been in there for quite some time judging by the destroyed bags against the wall. She walked up to Steve, and hugged him behind, not caring that he was all sweaty. He immediately stiffened against the unexpected contact. "Steve, I know your upset, and if you had listened you would have heard me tell Stark it never and would never happen. I threatened to disembowel him if he ever thought that he could get me into bed." Steve started to relax, his head slumping forward in shame.
"What about this Barton guy? You seemed really upset about him? Is he your lover or something?" Steve whispered.
Natasha couldn't help but laugh, "Me and Barton? Oh god no, that would be gross. He is like my brother Steve, nothing more. I know that he loves me, and has even tried to sleep with me, but that was years ago and I shot him down too." Steve's hand and reached down and grasped her handed that were around his stomach, and she interlaced their fingers, pulling him even closer. "Steve, the only person I have had any interest in being with after I met you, was you. Especially since we have been married. I spent a year morning your "death", before the Red Room captured me, and even after they suppressed my memories, I refused to sleep with any of my targets, even if I was ordered too. Got me into a lot of trouble, but even if I couldn't explain it back then, I know now that it was my love for you that stopped me. Steve, it's been 66 miserable, and horrifying years without you, and even with everything going on, these couple of days with you have been the best of my life." Tears had started to fall and Steve felt them soaking the back of his shirt. He gently turns around and hugs his wife, tears of his own sliding down his face as he kisses the top of her head. She raised her head and looked at Steve, unshed tears in her eyes, "It hurt me that you think I would be sleeping around with other people, even if you weren't missing almost 70 years Steve. I understand why you would but I'm telling you now I haven't."
Steve stared into her eyes and nodded, lowering his eyes in shame. Natasha raised his head a little and pressed her lips to his, showing him how much she had missed him, how much she loved him. After a moment, Steve started to kiss back. After several minutes of passionate kissing, Natasha found her back against the wall, her legs wrapped around Steve's waist and she saw a fire in Steve's eyes that she had missed, the love and lust darkening his eyes. She was about to go back in for more, when her ear piece chimed, Fury telling her to go interrogate Loki. With a groan, she told him she was on her way, a look of great disappointment on both of their faces as she gave him a light kiss in the lips before she untangled herself and left.
Steve was a lucky man, he knew that. He was lucky to have survived his childhood, when he managed to enlist in the Army, when he was selected to be the first super soldier. He knew that he was a really lucky man when not only did his wife not try to kill him for what he had done and said, but when she also forgave him without so much as a second thought. His sour mood had evaporated once Natasha had told him, and his lust flared once they started kissing. He had missed almost 70 years of his life, 70 years of his wife's life, and he wasn't going to miss anymore of it. That he promised.