Okay, so I know I already have a deaging fic, but this one is less fluff more plot and has been sat on my laptop for months waiting for me to do something with it or bin it, so I thought i'd see what you guys thought

"Stark I need you to come in"

"Fury, maybe you didn't get the memo; I don't work for you!"

"I wouldn't be asking you, but I'm desperate"

"Fury, I haven't slept a wink in days. Get your agents on it, I know you at least have a couple of matter assassins on your payroll"

"Tony, they're why I need you come in. Please?"

"W-what happened?!" all traces of annoyance, anger and sarcasm were instantly replaced with worry. Tony may not like Fury, but Clint and Natasha were part of his team, they were his friends Fury's tone of voice was causing him to panic

"Meet me at my office?"

"I'll be there in ten"

Tony strolled down the dull, grey shield hallways counting the million and one things which could have gone wrong with Clint and Natasha's latest mission; they went to Bermuda right? Looking into some new HYDRA weapons...
Tony was momentarily distracted when a young boy strolled past, he was about nine or ten and wearing nothing but a hospital gown. Tony thought it vaguely odd that a child was walking around shield but it wasn't until he caught a glimpse of the little girl with him did he find it truly odd; she had long, curly red hair and sparking green eyes; she was so Natasha it was untrue. She walked beside him, only around eight, wearing a matching medical gown.
Taking a second glance at the boy, Tony instantly recognised the grin on his face; Barton.

The girl noticed the look Tony gave them, grabbed the boys hand and ran, Tony was too bewildered to process what he had just seen before an alarm sounded and several armed shield agents ran up the hallway after them.

Tony still hadn't quite worked out what the hell was going on... Did those two have kids that no-one told him about? De-aging? Because that had happened before... Time travel? Cloning? Maybe he'd imagined it?... Tony was seriously beginning to doubt what he'd seen when he reached his destination: Fury's office.

He found fury in his office; desk upturned and laptop smashed to pieces on the floor by the opposite wall. He was pacing and rubbing his forehead in a way which told Tony something had gone seriously wrong... Hill stood in the corner, nodding to Tony as he entered but otherwise remaining still.

"Sit down Stark" he told him, his voice had an air of defeat in it already.

Tony picked one of the none broken chairs up from the floor "What happ-" Tony began, but was interrupted when Steve burst through the door

"Sorry I'm late sir"

"It's alright Rogers, take a seat"

"Wow. Avengers Assemble? This must be bad..."

"Stark-"

"Bruce and Thor joining us too?"

"Thor is in Asgard and I'm having trouble contacting him. Bruce is overseas and almost equally difficult to get through to"

"What about Clint and Natasha?" Steve asked, noticing how no one had mentioned them

"They're why I've asked you to come in"

The statement hung there in the air for a moment before Steve asked "What happened to them?"

It was a foregone conclusion that they were either critically injured, dead or in serious trouble...

"Remember last year, when the six of you were reverted to Children for several months..?"

Realization dawned on Tony's tired mind; he knew those green eyes, he recognised them instantly

"Well... It's happened again" Fury continued, "They're kids"