Au where Peter is Tony's biological son, and Tony has no idea that his son is Queens' vigilante. Peter is fifteen when his dad finds out about it.

Peter sat dejectedly on the edge of the roof, watching the wreckage of the building.

It had been a mess.

"You okay, spiderguy?"

As the repulsors whirred behind him, he took a deep breath. "Is everyone okay?" He cursed under his breath at how shaky he sounded.

"Mostly. Casualties were light."

Peter winced at that. "This is my fault."

He sighed under the mask. "If I hadn't stepped in, they would all be fine. They would have gone home to their families."

The suit's head tilted, seeming to study him, before opening.

Tony Stark stepped out.

"You tried. You tried to save them all."

Peter shook his head. "But I didn't."

They were silent.

Peter finally stood up. "I have to get going."

Tony simply nodded.

---------------

Peter made it home minutes before Tony did.

He tried to hide the fact that he was crying from everyone, and managed to do a reasonable job.

The only one not fooled by his acting was Natasha. They were very close, and Nat knew about his vigilante work.

She followed him to the gym.

"Okay. What happened on patrol?"

Peter hit the punching bag. "People died."

Punch.

"The building collapsed."

Thud.

"I couldn't get them out in time."

Punch.

"I'm a hero."

Thud.

"I should have saved them."

Punch.

"But I didn't."

His punching sped up, increasing power, and the bag rocked with the force of each punch.

"I didn't save them."

Panting for breath.

"I could- have saved them."

The bag flew off the chain, slamming into the wall.

"I didn't."

Natasha knelt, wrapping the teenager in a hug.

"It's okay, маленький паук. You tried. And for that, I'm proud of you."

He sighed, leaning into the hug.

"Thanks, мать паук. I'm going to try and sleep a bit before dinner. All right?"

She nodded, before touching his shoulder. "I think you should tell Tony."

His eyes shot up, panic showing. "What? No! He'd freak!"

Nat sighed. "Peter, you're going to have to eventually."

He turned away. "I-I will. Later."

-------------

The alarm rang through the compound, startling the team

No one noticed Peter slipping away during the commotion of suiting up.

No one noticed him leaving the building as his alter-ego.

-------------

When they arrived, they were struck by the horror of the scene.

The villain, a horribly deformed creature, was cackling as Spiderman tried to stop it from reaching a school bus of children.

"The itsy bitsy spider climbed up the water spout," the creature shrieked. "Down came the rain, and washed the spider out!"

The team threw themselves into the fray, half going for the villain, and half going to evacuate the surrounding area.

It was going well. The villain was getting weaker, his attacks slower, and the civilians were all safe.

But then Peter was thrown into a wall. It didn't hurt him badly, but it winded him enough that he couldn't get away from the gun aimed at his chest.

He felt a searing pain, then numbness. He tried to push himself up, ignoring his body screaming at him to not do it.

He stumbled away from the wall, back to the fight, or what was left of it.

The villain was subdued, being taken away, and the avengers were standing around, talking to the police.

Natasha was looking for Peter, trying to make sure he was okay. When she saw him, her heart stopped.

"Peter! No!"

No one heard what she said, but at her call, the team turned around. Tony and Steve darted forward to support Peter as he crumpled to the ground.

"Get the mask off so he can breathe." Tony ordered.

Natasha  knelt by Peter, gripping his hand. "If you want you can keep it on, паук."

Peter shook his head weakly.

Tony reached out, his fingers gentle, and lifted the mask.

It came away slowly, stiffened with dried blood, and slowly, the face underneath was revealed.

Tony drew a shaky breath. "No. No no no. Not you. Please not you."

Peter tried to take a breath. "I-It hurts, dad. I'm sorry- I tried to be strong-" his words ended in a sob.

Tony felt like falling apart, but he knew his son needed him. So he held Peter close. "Get an ambulance."

Peter's hand curled around Tony's shirt. "D-dad?"

Tony looked down, hating seeing his kid scared, and hurt. "Yeah, kid. I'm here." His voice shook, no matter how hard he tried to stop it.

"Are-are you mad?" Peter's eyes were focused on his face, blinking slowly.

"No. No, I'm not mad. I'm not mad. It's okay. You'll be okay."

Peter's grip slackened, and his eyes wandered to the sky. "It doesn't hurt an'more. 'M tired."

Tony shook his head frantically. "No, no, Pete don't fall asleep!"

Peter focused once more on Tony. "Why does it hurt, daddy?" His voice was soft, and childlike.

Tony felt his heart shatter. "You're okay. You're okay."

He repeated the same words until the ambulance arrived, holding his son in the aftermath of the battle.

-------------

The team waited. Everyone silent, each lost in their own thoughts, waiting for news.

Hours passed before they got any.

--------------

The surgeon emerged, eyes tired, and shoulders slumped.

"He's alive," he said quietly. "But its touch and go right now."

He looked at Tony, and his tired demeanor.

"You can visit him, but I don't think he's going to wake up tonight. Frankly, for a long time."

Tony stood up and followed the surgeon.

--------------

His breath caught when he saw Peter. The boy was pale, and still, all the tubes making him seem smaller.

"Pete-" he whispered, looking at the broken boy.

Tony gathered his composure, sitting beside him.

"Hey. We're worried about you. I'm scared too. I need you to be okay. When you wake up, we can work on a new suit for you. If you want. I have some ideas. You just have to wake up, so we can work on it. I'm not mad. You were helping people. I'm proud of you. I don't say it enough. I love you, kid. And I'm so, so proud of you. I am so proud."

--------------

Peter opened his eyes to dim lights, and pain, along with the smell of antiseptic that he associated with hospitals.

He lifted a strangely heavy hand, looking at it.

"Wha' happ'ned?" He mumbled.

Instantly there was a blur of movement, and a face bent over him.

"You gave us quite a scare."

The nurse smiled gently. "How are you feeling?"

He groaned. "Nnnn."

She laughed softly. "Fair enough."

He searched the room groggily. "Where's dad?"

Her smile faded slightly. "He's been out of his mind with worry. Would you like to see him?"

He nodded quickly.

She went to the door, signaling a passing nurse. "He's awake. Can you get his father?"

-------------

Tony was dozing when the nurse came out.

"Mr Stark?" The woman queried.

His head shot up, worry emanating from him in waves that eased as he heard her next words.

"He's awake. Asking for you."

He followed her silently, heart pounding.

--------------

The door opened, and Peter smiled weakly as he saw Tony. "D-dad?" His voice was weak, and scratchy.

Tony hurried to his side, dropping his knees beside Peter, holding Peter's hand between his own. "We were so worried. Never do that to me again."

Peter blinked slowly. " 'm sorry. I wanted to tell you."

Tony shook his head gently. "No. You have nothing to be sorry for. I'm not mad at you."

Peter nodded slowly. " 'm tired."

Tony smiled gently. "I know. You can go to sleep. I'll be here when you wake up."

Peter's eyes fluttered, and as he drifted off, he heard four words.

"I love you, kid."