Endgame spoilers.

But this is a fix it.

"Dad!"

"You would not believe what's been happening, dad! You remember how we were on that planet, and then I got all dusty? I must've passed out, cause when I woke up you were gone, but Dr Strange was there, and he was like 'it's been five years they need our help' and then he started doing that yellow sparkly thing-"

He was cut off as his dad pulled him into a tight hug.

Peter closed his eyes, reveling in the warmth and comfort of being in Tony's arms again. "This is nice," he mumbled. "Missed you."

His dad pressed a soft kiss to his temple, squeezing him tightly before releasing him, stepping back and running his hands down Peter's arms. "Are you okay? You're not hurt, are you? You're good?"

Peter nodded hastily, glancing back at the battle. "Why does Thanos look younger?"

"He had a spa day," Tony deadpanned. "No but really, it's complicated. It involves time travel."

Peter's eyes lit up. "Time travel? Cool!"

Tony pulled him closer, out of the way of a metal shard flying through. "Yeah, but we can talk details later."

The corner of Peter's mouth quirked up. "Got it. Be careful, okay? Don't do anything I wouldn't do-"

"And don't do anything you would. That's my line, mimmo."

The teenager shrugged, giving Tony a quick once over. "Well if the gucci shoe fits. Be careful, dad."

"I'm the parent here. I'm supposed to tell you to be safe."

"Okay then. I'll be careful too. Just don't do anything stupid?"

"Me? Do something stupid? Nah."

Peter had been hurled through the air, clutching the gauntlet tightly and praying for safe landing.

Then the glowy lady had come, and she had smiled at him.

"Hey." He stammered. "I'm- I'm Peter Stark."

Her eyes twinkled. "Hey Peter Stark. Got something for me?"

A sense of relief came over him, and he relinquished it without argument. "How are you going to get past all of those? No offense, but I don't think you can do it alone."

"Don't worry." The accented voice was low as the Wakandan General stepped up, glancing around.

"She's got backup." The Scarlet Witch's smile was sharp, the smile of a predator over their prey.

Then he was surrounded by the strongest women he knew, with some he had only ever heard tales of.

Wanda, Okoye, Hope van Dyne, Pepper Stark, Valkyrie, Mantis, Gamora, Nebula, even Shuri, the warrior princess.

He was bounced around the battlefield all at once, fighting here and there, helping other when they were overwhelmed, and searching for his dad.

When at last he found him, Tony was battling Thanos himself, matching blow for blow against the Titan.

Tony stumbled back as Thanos knocked him off balance, but before the Titan could get in another blow, Peter flipped forward, slamming into Thanos, and knocking him several paces forward.

"Get off me, bug!" Thanos spat, clawing for a grip on Peter's armor.

"You-" Peter crashed into the ground, "uneducated-" Thanos' hand slammed into him, knocking the air out, and fingers tightening around the teenager's throat, "swine!"

"Karen, activate- instant-" he choked, gasping for breath, "kill!"

The eyes of his suit glowed red, and the arms sprung out, stabbing into Thanos' arm. The Titan growled, flinging Peter away.

Before he could finish the job, red mist curled around his body, effectively freezing him in place.

"You." Wanda snarled. "You took everything from me."

"I don't even know who you are!" The Titan protested.

"You will," she spat.

As she took care of the giant, Peter crouched beside his dad. "Dad, are you okay?"

Tony groaned. "Why did I sign up for this again? I could have had a nice vacation with you, Pep, and Morgan. Instead I get the genocidal maniac bent on destroying us."

Peter threw him a puzzled glance. "Who's Morgan?"

His dad froze. "Oh. You don't-"

His words were cut off as his gaze flitted to the side, and panicked filled his eyes.

Thanos lifted the gauntlet, preparing to snap.

He launched himself forward, grappling for the gauntlet, Peter joining him.

Then they were both thrown back, slamming into the rough ground.

"I am inevitable." Thanos lifted his hand once more...

And snapped.

He stared at the empty gauntlet in horror. "Stark. What did you do?"

Tony raised his own gauntlet, but before he could do anything, Peter was on him, tearing the stones away from his father.

"Peter- no!"

The power surged as the nanotech in his own suit formed a smaller scale gauntlet, and the stones fell into place.

The feeling was the worst pain he'd ever felt.

There was surging power, a higher level of consciousness, the realization that he could do anything, be anything, control his own destiny, become a God.

But then scattered memories flowed through his mind.

Laughing with his dad in the lab.

Singing off key to their favorite Disney movies.

Quiet nights where they fell asleep on the couch.

And he didn't want it.

He didn't want that power.

He cried out as the pain reached its peak.

"You made- a mistake-" Peter gasped, gaze focusing on the Mad Titan. "I'm an arachnid."

And he snapped.

The sudden silence was deafening, as the enemy army collapsed, fading into nothing.

Thanos settled on a boulder, gazing wearily across the battlefield.

Then he too, faded.

Suddenly Peter was on the ground, with no idea as to how he'd gotten there.

His dad was there, cradling the teenager to his chest, pressing soft kisses to his forehead between sobs. "Peter- baby, why- why would you-"

Peter tried to smile, to reassure him, but couldn't move.

His eyesight faded, everything blurring except his dad's face, whispering broken promises above him.

"You're gonna be okay." The words were shattered, fractured with grief. "I love you so much- you're- you're gonna be okay."

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

Dying didn't hurt.

Dimly he registered the panicked sobbing, the gentle hands on his shoulders, the soft surface underneath him, and thought he should be in pain.

He shouldn't be this peaceful.

A voice came nearer. Familiar, giving a sense of security. "Peter? It's okay, baby. You're gonna be okay. I'm right here. I'm not gonna leave you.  I'm never going to leave you."

Comforted by the words, he slipped back into darkness.

"Daddy?"

"Yeah Pete?"

"How long are you going to take care of me? Do you have to keep me all my life, or are you going to leave me like my other parents did?"

"No, bambino. I'm never getting rid of you. I'm never leaving you, and I will never stop taking care of you."

"Even when I'm old and wrinkly? Like you?"

"I resent that remark, kiddo. But yes. Even when you're old and wrinkly, I'll take care of you."

"Promise?"

"Promise."

"He might not wake up, Tony." The voice was quiet, hesitant. "You have to know the possible outcome. Sitting here watching him isn't going to bring him back."

"I'm not leaving him, Steve. He's my son. My baby. I promised I wouldn't leave him. I promised him."

"Tony, you can't keep doing this. It's been weeks. You've barely left this room, and Pepper said you haven't gone up to bed at all. Morgan wants to see you."

"I can't leave, Cap. He woke up alone, on Titan. He isn't going to wake up alone this time."

"Just- sleep. For a few hours. Eat something. Peter would want you to take care of yourself."

"You don't know a single blasted thing about him, Rogers, so don't you start."

Scrunching his face up, Peter slowly opened his eyes.

His dad and Steve were on either side of him, Tony's hand holding his.

They were staring at each other, Steve with sadness, Tony with frustration.

"He's right, y'know." Peter mumbled.

Their gazes shot to him, Tony half rising to brush Peter's hair away from his forehead as Steve gave him a smile. "There he is."

"Hey," Tony whispered. "Hey bambino. There you are."

Steve slipped out unobtrusively, leaving Tony to cup Peter's face in his hand. "How are you feeling?"

Peter turned his face further into his dad's hand, smiling tiredly. "Mm. Is this what it feels like to be high?"

The corners of Tony's eyes crinkled. "Yeah. You're on the good drugs."

"Mm."

"Are you hurting?"

Peter closed his eyes tiredly. "Nope. Feel fuzzy."

"Good." He gave a heavy sigh. "That's good. Not the fuzzy part."

His thumb rubbed soothing circles on the back of Peter's hand.

"You okay?" Peter whispered.

Tony's gaze shot from the floor to his son's face. "Me? Pete- kid-" he faltered, rubbing his hand over his face. "You're- I'm fine, Pete. You're the one who's been in a coma for six weeks."

Peter winced. "That's- quite a while."

His dad blew out a quick breath. "Yeah. Too long."

Then his voice hardened. "Why on earth would you do that, Peter? You knew that was incredibly dangerous, and stupid, and-"

Peter flinched, eyes dropping to his bandaged arm. "'M sorry dad. Just wanted to keep you safe."

Tony stilled as he saw the wetness in his son's eyes, quickly dropping back into the chair beside him, and reaching out his hand. "Pete, bambino- hey. Don't- I'm sorry. I'm sorry."

Peter wrapped his arm around his midsection, quite obviously shaking, whether from cold, pain or stress, Tony couldn't tell. "I just wanted you to be okay."

His dad ran a hand over his face, then stood up, going to the other side of the room and returning with a warm blanket. "Move over, bud."

Peter blinked up at him. "What?"

"Move over," he repeated. "Come on. Scoot."

He gingerly helped his son move several inches to the side, then sat and leaned against the headboard, spreading the blanket over them. "C'mere."

Peter snuggled willingly against his side, burying his face in his dad's shirt as Tony's arms wrapped around his shoulders, pulling him closer.

Just as he thought Peter was asleep, his son spoke up hesitantly. "Who- who is Morgan? You mentioned her before."

The corner of his mouth lifted, and he turned, adjusting his position to where they could see each other. "That's a bit complicated to explain."

Peter's forehead creased. "How?"

"Morgan-" he hesitated, then decided to go ahead and light the bomb. "She's your little sister."

Peter stilled, gaze shifting from his dad's shirt to his face. "I have a little sister?"

Tony jumped in to fill the sudden silence. "Yeah. Pepper told me after I got home from-" he hesitated. "After I got home. She's four now. She's grown up on stories of her big brother. She knows about your extracurricular activities, and is determined to be the next hero. I am firmly against it. Having one superpowered kid is stressful enough for me."

Peter rested his head back against his dad chest. "Cool." His voice was a sleepy mumble at this point. "Always wanted a little sister."

Pressing a soft kiss to his son's temple, Tony brought the teenager closer. "Lights off, Fri."

The room went dark, and the humming of the machines were the only noise.

"You'll love her."

Tony waited for an answer, but none came, and he smiled as he heard the soft rhythmic breaths from his kid.

"Love you Pete."

All was well.