An-Peter is Tony's biological son, and he comes home with his report card to show Tony, only to be faced with the newly reformed avengers. (Civil war didn't happen, they talked it out like the adults they are, Bruce and Thor aren't there)

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Peter was bouncing on the heels of his feet in the elevator, humming a tune he couldn't recognise. He'd just gotten FRIDAY to take him to whatever level his dad was on, he was so excited to show him his report card, he'd had a look and he's gotten all A's. The doors opened to the common level, "Why's dad on this level FRIDAY?" Peter questioned, stepping out carefully, getting nervous when he heard voices.

"Your father says you are allowed to come through, but that he has guests." Peter shrugged and quickly kicked off his shoes, leaving them by the elevator, dropping his bag as well, he'd get then on his way to his room. He ran through the hallways clutching his report card in one hand, not caring enough to see who else was in the room with his dad when he started speaking.

"Dad! I got my report card today! I already looked at it cause I couldn't wait and Ned and MJ wanted to see how I did compare to them, MJ did the same as me except she got one B, and Ned got two B's, and my teachers keep saying I need to study more even though-" Tony put up a hand to shush Peter, motioning to the other people in the room, the rogue avengers. Now that Peter thought about it, his father had said something about them coming back today. Peter clamped his mouth shut and looked back at his father, this was not how this was supposed to go. He just wanted to hand off his report card, maybe get it stuck on the fridge and head off to do his homework. Tony patted the seat next to him and Peter hesitantly sat down, still clutching his report card, swallowing thickly.

"Tony, who is this kid and why did he call you dad?" Steve said Peter and Tony glanced at each other.

"He's my kid genius. Has been since he was born." Tony threw an arm around Peter's shoulders, "You weren't meant to meet him yet but he has a habit of popping up where he isn't supposed to be, and I knew he ignored FRIDAY if she told him to go straight to his room. Introduce yourself." Tony nudged Peter lightly.

"Um, I'm Peter, Peter Stark. I'm not that interesting." Peter said quietly, sinking into the couch.

"What do you do for fun Peter?" Clint said, making Peter blush red.

"Um, I like science I guess. If you want to find me I'm usually in dad's lab or in mine." Peter said, Tony scoffed next to him.

"Come on kid you're more interesting than that. He likes lego and StarWars, and one of his friends MJ he's been crushing on since preschool-" Peter lunged at Tony, covering his mouth with his hand. Peter looked furious.

"You promised you wouldn't tell anyone!" Peter said as he removed his hand from Tony's mouth. The team were stifling laughter.

"Really? Since pre-school?" Sam said, making Peter's ears burn. Peter just sunk into the couch, muttering in Spanish.

"Hey! Don't make me bring your mum down here so she can translate. I don't know why I ever let you learn another language, I always knew you'd use it to mouth me off." Tony swatted Peter's arm. Peter and Tony continued to squabble, swatting each other every now and again.

"Never thought I'd see another Tony but here we are," Natasha said quietly, making both Peter and Tony stop, except Peter continued to poke Tony. Steve stood up and walked over to Peter, putting out his hand.

"Steve Rogers, it's a pleasure to meet you." Peter once again looked starstruck but shook Steve's hand.

"I know, I have your action figure. Actually I have all of your action figures." Peter muttered, cheeks immediately flushing red. The team laughed in response, Steve smiled in response, Tony grumbled, pulling Peter back onto the couch.

"Don't feel special rogers, he's had them since he was six, and he has more StarWars figurines then you can count." Tony smirked at Peter, motioning for his report card, "Hand it over Underoos, want to see how you did." Peter smiling wide and handed it off to Tony, who opened the envelope and pulled out the card. Tony had a wide smile as he read down the page. He placed it down on his lap and turned to Peter, "I owe your mum, with how much you're away I didn't think you'd get all A's. Not even I got all A's." Peter mocked offence.

"The difference between you and me is that I actually study," Peter said smugly before taking back his report card, holding it proudly in front of him, "Although between you and me, I thought I was gonna fail English for sure, I can't do creative writing for sh-"

"Language!" Tony shouted, lightly smacking Peter's arm.

"Since when did you care when I said shit? You're the one who taught me the word." Peter grumbled. Tony shoved him off the couch, Peter gaped at him, "Betrayed! By my own Father! Ya know this is some reach Darth Vader stuff. I should have FRIDAY call you Darth Vader." Tony rolled his eyes.

"Go show Pepper your report card, she'll want to see it. We'll put it on the fridge, I'm proud of you kid." Peter had a bright smile on his face as he shot up from the ground, waving to the rest of the team as he fled to the elevator, "AND PICK UP YOUR DAMN SHOES I KNOW FOR A FACT YOU LEFT THEM BY THE ELEVATOR, I DONT WANT SOMEONE TRIPPING ON THEM." Peter yelled back and 'okay!'.

"Jeez Tony, I can't believe we didn't know you had him. He's nothing like you though, way to calm and kind." Clint mocked, making Tony roll his eyes.

"Damn right he's an angel," Tony grumbled.

"Wait, is Pepper his mum?" Scott questioned.

"Not biologically, didn't know he existed until his mum died, his mum dropped him off saying I had full custody. Pepper adopted him a while back, loves him like a son. He adores her, she adores him, started calling her mum a while ago, took him ages to trust her though." Tony said.

"Well, I know why she adores him, I adore him and I've only known him five minutes," Natasha said.

"Well, I might be able to convince Pepper and him to eat down here tonight and every other day so you guys can get to know him." The team nodded in response, happy to get to know Peter.

"Darth Vader, young Peter and Scary Boss Lady have requested you come upstairs for dinner." Tony looked up at the ceiling in betrayal.

"Really FRIDAY, betrayed by my own creation? Why do you even listen to Peter?" Tony said, standing up, picking up his suit jacket as he went. The team didn't hear the response as Tony hastily left the room "Sorry guys I gotta go, Peter and Pepper's wrath are unmatched, don't want to go round making them mad."