For KuroEngel_OG Happy Birthday

"She isn't going to thank you for this..........." Steve said, as he looked over at Tony, the billionaire putting the finishing touches to the decorations.

"Thank you for your input, Captain spoilsport. But no one asked you for your opinion. We have had a tough few months and we all need to let off some steam; so what better an excuse, than (Y/n)'s birthday." Tony replied, gesturing to Bruce to release some more of the helium filled balloons.

"Yeah, but it looks like something for a five year old........." Clint noted. The archer having to agree with Steve, that when Nat and Wanda got (Y/n) back to the compound, she wasn't going to be happy. Everyone only finding out about the special date, just the day before. It taking every ounce of the Widow and Scarlet Witches persuasive powers, to talk her in to going out for the day, so that the others could organise something. So that gifts could be bought, and an impromptu party, set up. Though given that when birthdays had been spoken about before, in passing conversations, (Y/n) had always said that she didn't do anything when hers rolled around, that she tended to just see it as another day. But Tony had got it into his head, for some unknown reason, that this year, he had to change that; stating that the beautiful agent, deserved something. His push to make the evening special, raising a few eyebrows; but this was Tony, and everyone knew that he didn't need much of an excuse.

"Next thing we know, Thor will show up as a clown making balloon animals and Loki will be making the flags of the world appear from his top pocket." Sam having to agree with Clint, which earned him a look from Tony.

"If you think you can do better, by all means take over, birdbrains. Okay, I could have got other people in to do this; but today is different, I wanted to do it myself. And if you feel that (Y/n) will hate this, then she would really hate something fancy. Now, make yourself useful, and fill up a few more of those balloons with helium." The billionaire countered, before turning his attention back to the balloons he already had. His new comments only making the others look at one another, more confused than they were before. The rest of the team wondering what made (Y/n)'s birthday so special that Tony would want to do everything himself, rather than leaving it all to some ridiculously overpriced party planner.

It was true that since (Y/n) had joined them, Tony had been back to his flirtatious best. The billionaire on a charm offensive, ever since Fury had introduced him to the new team member. There not a day going by when the others wouldn't roll their eyes or shake their heads at the double entendres or the flirty comments that were made between the two. (Y/n) proving to be as bad as Tony was. And it was also true that one or more of them had caught the two late at night, on more than one occasion, just sitting in the common room, laughing together about something that they only seemed privy to. But again, they had just put it down to the two being alike; that a friendship had grown up between them. Though now, some of them were having to wonder whether it was something a little more serious. Bruce just shrugging as the other boys looked at him, he knowing about as much as they did; which was not a lot.

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(Y/n) was glad to see the compound, as Nat drove her and Wanda, home. It not that she didn't like spending time with the other girls; it was just that she had wanted something different for her birthday. It that she had wanted to come up with an excuse where she could just leave and then meet up with someone special. Someone who had become more important to her then she could ever have believed when she had first met him.

From the moment that she had met Tony Stark, he had done nothing but flirt; and given that he was such a handsome, charismatic man, she couldn't help but flirt back. It quickly becoming the thing that they would do. It making them both laugh, as the others would groan and roll their eyes at the pair's antics. But slowly, steadily, things had progressed; it no longer just suggestive comments, and the odd smile and wink; it becoming long nights of just the two of them talking, finding out about the other. Each night seeing them move closer to one another; until they had begun to hold hands, until they had kissed. (Y/n) unable to believe it when Tony had confessed that he had feelings for her. Feelings that she shared. And she had hoped that she would be able to spend the day with him; but Nat and Wanda had had different plans. (Y/n) wishing that she hadn't accidentally let it slip that it was her birthday today.

"Where is everyone........?" (Y/n) asked, as she, Nat and Wanda moved through the compound; the space seeming strangely dark and quiet for that time of the evening.

"They are probably all in the common room." Nat simply replied, as she looked to Wanda. (Y/n) nodding in agreement; aware that the boys were most likely all together playing some game or another. The agent chuckling at Bucky's continued obsession with Candy Crush. The agent hoping that if everyone else was preoccupied, she would be able to get a little alone time with Tony. Yet as they got to a blacked out common room; the lights suddenly turning on to reveal the others and party decorations. The loud 'SURPRISE' and the smiling billionaire letting her know that this was not going to be just another quiet birthday.

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"So.........?" Tony asked, as he took a seat on the sofa next to her. Handing her another glass of champagne before pulling his arm around her; the others long since having called it a night.

"You don't hate me for doing this...........?"

"Well, I must admit that I was hoping for a quiet night, just with you; but I have to admit that I had a good time. And seeing a couple of people suffer from hangovers in the morning will make me laugh. So, no, I don't hate you for my birthday party. Though I was hoping to see Thor come down the Bifrost with a squirty flower and a big red nose; pulling Loki along with doves and playing cards falling out of his pockets." (Y/n) chuckled, as she leaned in and kissed him. Tony resting his forehead on hers, as they sat there in a comfortable silence.

"But there is one thing.........."

"What..........?"

"I got a gift from everyone else, except for you........" (Y/n) told him. Pulling away and shaking her head at the handsome man that was giving her a dramatic confused look.

"Didn't I.......? Hmmmmmm, well, I will have to fix that, won't I." He told her, before reaching into his pocket and pulling out a small box. The breath catching in her throat, as Tony slipped from the sofa onto one knee and opened the box.

"(Y/f/n) (Y/l/n). Will you make me the happiest man in the world, and marry me?" He asked, as he removed the ring from the box before taking her hand. The billionaire quickly slipping it onto her finger as she agreed. The billionaire getting to his feet and pulling her up to join him.

"Now, soon to be Misses Stark, why don't we go to my room, and I'll give you your other birthday present." He continued with a smile, before taking her up into his arms and carrying her out of the room. Tony determined to continue making this a birthday that neither of them would forget.