I do not own this

"So basically, shield and the rest of the world are about to be destroyed." Banner summed up. They were back on the helipad, with Nick Fury quickly filling in the avengers about what has happened. He was more normal now – although he'd never admit it, the agents could tell he was pretty shaken up when he first heard the news about the future invasion.
"Well this sounds like fun." Tony said sarcastically, while Steve simply rolled his eyes at his words in exasperation. Suddenly, a big man in battle army swept into the room. He had a hammer in one hand, and looked furious.
"Have I missed it?" He asked impatiently, "I have only just found out that our group was being called."
"Glad you could make it. Thor. We were just filling everyone out about the mission." Fury quickly explained the mission that had occurred once more, getting a bit tired of repeating himself this time round.
"We don't know where exactly the SPM are based so we can't just storm in, and we don't know what they are doing, but I want you all on high alert." Fury ordered to the avengers, who nodded in agreement.
"I'm sorry, but who are you?" Banner was the first person to notice the new edition to the room, and although Isabella had already met Stark, he perked up at the question too.
"Um," Isabella started, glancing at her sister for help.
"This is my sister, Isabella Romanoff," she said coming to Isabella's aid.
"Your sister?" Steve said incredulously. "How come you never mentioned her before?" Then he faltered slightly as he remembered his manners, "Nice to meet you anyway Isabella."
"Isabella and I lost each other a couple of years back, but we found each other recently." She explained.
"Pleasure to meet you Isabella" Banner and Thor said simultaneously, as Fury continued his speech.

"Banner, Stark, I want you on research – find out whatever you can about this group and where they might have a base. Steve, you're going to be co-ordinating the investigation. Thor, you can help Banner if you want." Fury assigned everyone their jobs. Stark almost laughed at his last order – Thor only really believed in magic rather than science so he wouldn't be much help. As they turned away to do their various roles, Clint called out,
"What about us?" indicating Isabella, Natasha and himself.
"Rest." Fury said simply. Natasha opened her mouth to complain, after all why should they do any less than the rest of them, but before she could speak, Fury interrupted her, "You've been on the go for hours what with the mission and then calling people in. You'd be better use to use once you've had a break." Fury ended in his no nonsense tone. Then they really did leave, each going their separate ways. Isabella went straight to the room she had stayed in the night before and collapsed on the bed. Although she would never admit it, she really was exhausted, so within minutes she was asleep.

Natasha and Clint went to their favourite spot on the hellicarrier. They didn't think anyone else knew it was there, which suited them for they loved the area. There is a secret door above the ceiling on floor 9, which if you have the guts to look through, leads out to an open space. There is a window in the far corner, which you can snuggle up by and stare out at the city below them. Clint found it when exploring the carrier not long after he joined up, but he never got tired of it. They both sat down next to the window and gazed out, watching the world turn. It took a few minutes before either person said anything.
"It's going to begin again isn't it?" Clint sighed quietly, relishing in perhaps one of the few moments of peace that they were going to get in a while.
"Yeah," There was another long drawn out pause, "It won't be like last time. Not like it was with Loki." Natasha attempted to placate Clint's fears. Having worked as partners for so long, she knew that he was worried about being taken over again. Having someone play with your mind so that you have no control was a pretty scary thought she'd admit.
"Sure." Clint replied, not really believing it. Then, hand in hand, they drifted off to sleep.

Isabella woke up the next day in her small room. She turned around and glanced at the alarm clock on the side, which read in bright letters, 4:00. 4 O'clock – that was too early in anyone's book! Nonetheless, Isabella knew that she wouldn't be able to get back to sleep again now she was awake. With a short yawn, she clambered out of bed and put on a suit. Then she crept along the corridor quietly so that she wouldn't wake anyone up. She was in a daze, barely knowing where she was walking until she opened a door and found herself in a gym. After pausing for a moment by the door, she stepped in and decided that she might as well do some training. A few running machines stretched across one wall. Weight lifters, gymnastics beams and bars, and target ranges were scattered here and there, whilst a huge cupboard, overflowing with weapons lay to the side. In the centre, a huge boxing ring stood overlooking everything. Isabella smiled – this was her kind of place. Picking out the nearest running machine, she made her way over and began to train.

Around an hour later, she heard someone walk in to join her. Glancing around absentmindedly, she noticed Steve Rodgers sneak in. He too was about to walk over to a running machine when he looked up and recognised Isabella.
"Oh, you're in here." He said surprised, "I didn't think anyone else would be up at this time."
"Couldn't sleep." Isabella admitted, as she carried on running, barely breaking a sweat even after all this time.
"Mind if I join you?" Steve asked as Isabella shook her head. He took up the machine beside her, and after turning it on to the super- advanced setting, began his morning jog. None of them noticed the time pass – it was as though it didn't even exist in this room as they poured all their efforts into working out.
"So, If you don't mind me asking, how old are you?" Steve questioned curiously.
"Only 15."
"Really." He sounded surprised. Perhaps he didn't think a person of that age could be working with shield. Then again, she didn't exactly have a normal upbringing. Another door opened to reveal a very sleepy Clint Barton.
"You like to train early too?" Isabella called out to him cheekily. He scoffed before saying,
"Not at all. Just thought you might like to know, Stark and Banner have found something."

Another chapter done – I think I'm getting better at updating regularly! Thank you thank you thank you Okymura Ichigo, and Kathleenhmc for taking the time to review. I love reviews now and I think they are my new favourite thing! Anyway, enjoy the chapter.