Peter was so immersed in his work that he didn't notice the door to the lab open and Tony walk in. He did however notice the man when he let out a sharp cough to attract his attention.

Tony watched as the boy's head snapped up at his cough and his face paled dramatically knowing he had been caught in the wrong. The man maintained eye contact with the kid as he put down the web shooter in his hand.

"What are you doing here?"

The question was crisp and clear, Peter could hear the steel and fury under the question however and didn't think twice when his own anger and resentment at the man bubbled up within himself. "What does it look like" he replied snarkily.

Tony raised an eyebrow at the boy trying not to let his disbelief at Peter's disrespect show on his face. "Would you like to try that again Peter?" he asked staring into his eyes. He watches as the teen gives a sulky shrug but refuses to speak. "You know perfectly well you aren't allowed down here alone, we've been over this rule multiple times."

Peter doesn't think as his furious response leaves his mouth "your rule is fucking bullshit."

Both of them freeze in a state of disbelief, the words repeating in their heads.

Tony is gobsmacked. How dare Peter speak to him like that! The boy knew that was unacceptable, Peter would never speak to May in such a way he was sure. Fury quickly replaced the shock he felt and he could barely get the words out. "My office now. I want your nose in a corner by the time I get there" he grits out.

Deciding he doesn't want to walk past the man just in case he swats him, Tony had a habit of giving him the occasional swat when he was misbehaving, he turns on the spot and storms out the other door of the lab making his way up the stairs. It's only two floors and he knows Tony will probably take a moment to calm himself down anyway before coming up to his office. He marches up the stairs furious at Tony. He hasn't been there all week and then suddenly appears the one time Peter goes against him. Why is he so angry anyway? That lab rule is bullshit. Oh god…I swore at Tony Stark… he thinks to himself in a slight panic before anger overtakes him again. He deserved it anyway…asshole.

Tony follows Peter upstairs a minute or so later and comes to an abrupt stop once he reaches the penthouse. Peter is frozen in the doorway looking into the lounge where Nat and Bruce are sitting staring back at him. Tony stops just behind the boy, kicking himself he should have realised Pep meant upstairs as in here not the avengers floor below. They were coming for dinner after all.

Tony drops a hand down on the frozen teens shoulder feeling him jump at the contact. He leans down and murmurs into the boy's ear "I believe I told you to find a corner in my office Peter."

"Fuck off." Peter snarks back as he tries to shrug the hand from his shoulder. He hears the other occupants of the room take in a breath but can't find it in himself to care.

Fury overtakes Tony at the boy's attitude. Without thinking he takes his hand back and swats Peter hard. "If you don't get moving this second little boy I will spank you right here. Do you hear me?"

Peter nods and practically flees to the office the door closing forcefully behind him. Bringing a hand up to run through his hair Tony makes eye contact with Pepper who has just entered from the kitchen.

"We will go downstairs, I'll order dinner to arrive in a couple of hours so you can deal with Pete unless you would prefer I do it?"

Tony shakes his head, "no I've got it, he was rude to me and in my lab, I will punish him" he turns to look at Bruce and Nat, "I'm sorry you had to see that, I don't know what has gotten into him. I assure you it will not happen again."

Still in shock over what they just witnessed Bruce and Nat simply nod and move towards the elevator in a stunned silence.

After a minute or so of staring at the wall Peter's anger subsided somewhat and dread overtook him. He was so dead. He wasn't afraid of Tony far from it, but he did not want a spanking. He heard Tony enter the room after about five minutes and sit at his desk. Ugh definitely a spanking, Peter had been sent to the corner of the office several times now and the only time Tony had ever sat on that chair was after the ferry fiasco.

"Come here." Tony sounded resigned yet firm and Peter slowly turned his eyes on his toes as he walked towards the man.

"Look at me Peter."

Peter looked up into his eyes and could already feel a slight lump in his throat when he saw the disappointment in his eyes.

"You are to be punished for being in my lab unaccompanied and for your foul language. Which do you want first?"

What kind of ridiculous question was that? He didn't want either. And two different punishments? Oh god one was a spanking but the other? Would he have to do lines again?

Tony watched as the boy turned over the question in his mind then simply shrugged. Making the decision himself Tony grabbed the boy's ear and led him to the bathroom on the other side of the office. He sat the boy on the seat and opened the cabinet grabbing a face cloth and a bar of soap. He had bought these after reading the parenting books but had honestly never expected to be using them.

When Tony began lathering the soap and covering the cloth in suds Peter realised what his punishment was. His mouth had been washed out once before when he was six and had said the word shit after hearing some older boys say it. When the man turned around wash cloth in hand Peter kept his mouth resolutely shut.

"Peter Benjamin Parker, if you don't open your mouth in the next three seconds I will be taking you downstairs and punishing you there." It was an empty threat he could never do that to the boy. His punishments were private, it was a family matter but he didn't know that.

As soon as Peter opened his mouth Tony rubbed the cloth all round his mouth, over his tongue, teeth and gums ensuring his mouth was filled with suds. "One minute per swear Pete so that's three minutes."

Peter tried not to move his tongue and tears quickly came to the corners of his eyes due to the rancid taste of the soap. How could something smell so good and taste so vile? He breathed through his nose and started jumping his leg up and down to distract himself from the horrid taste in his mouth. He had just begun drumming his hand on his thigh when Tony began speaking.

"You young man are never to speak like that again in this house okay? You are not to use such foul language against someone. I don't care if you are angry you can express yourself with other words, I did not deserve to be treated like that. If you are willing to swear at me would you speak like that to Pepper or May?"

He watched a tear slide down Peter's cheek as he shook his head furiously. "That's what I thought, if I ever hear you use such language again you will find yourself straight back here okay."

He stops lecturing the boy and looks at him feeling terrible. Fat tears were rolling down his cheeks from the awful taste and the boy was clearly trying to distract himself it. "Just one more minute Pete then you can spit." He murmured reassuringly.

Peter starts to countdown in his head desperate for the minute to end. He would never swear again. Or at least not where Tony could hear him.

"That's it, you can spit. You can rinse three times underoos" Tony says as he hands him a class.

Peter jumps to the sink spitting immediately eager to get the foul taste from his mouth. After rinsing three times the awful soapy taste remains but it's not as horrendous as before. He looks at Tony with his doe eyes begging for another rinse but is met with a shake of the head and a hand on his shoulder steering him back into the office.

Tony sits himself back on his desk chair and opens his legs pulling the boy forward to stand between them so they are eye to eye. "So let's try again Peter why were you in my lab, despite me expressly forbidding you from going in alone."

When he doesn't answer immediately and instead stares at his shoes Tony reaches a hand forward to lift his chin forcing eye contact.

"I just wanted to make more web fluid I'm running low"

"Peter I told you I would do that with you this weekend. Why did you go into the lab?"

"I don't understand your problem, I have been making the web fluid for ages, I know what I'm doing."

"Peter." Tony says firmly stopping his babbling. "I know you can make the fluid but you don't know everything that is happening in my lab all the time do you?" As the boy shakes his head he continues you. "So what if something in your web fluid contaminated something of mine? It could blow up, anything could happen."

At those words Peter paled realising the implications of his actions. "I didn't think…" he mumbled.

"You didn't think…Peter you are a smart boy. You cannot do this again do you understand?" The boy nods glumly resigned. "Right over my lap" As the boy moves to drape himself over the elders lap Tony gives a gentle but firm reminder "pants Peter, when you risk your life or risk getting hurt needlessly I will spank you bare."

His face flames but he does as he is told and stiffly lays himself over Tony's knee.

Ugh this is just as horrible as last time Tony thinks to himself. He quickly activates his gauntlet and brings his hand down on the boys bum. He builds up a steady rhythm as he turns the boy's skin pink before he begins talking.

"Why are you here Peter?"

Remembering the sharp swats for taking too long to answer the last time Peter is prompt with his response. "I broke your rule and went into your lab without permission." He groans slightly as a harsh swats prompts him to continue "I could have got hurt, or caused an accident and I was rude to you."

Nodding to himself Tony speeds up his swats bringing them down harder turning the kid's ass red. His leg kicks slightly and Tony quickly moves his own to trap it there, preventing Peter from hitting him. Soft hiccups start to leave Peter which then turns to yelp and quite cries. The sounds pull at Tony's heartstrings but he knows he has to finish the punishment or Peter will never learn. Soon the cries become all out sobs as he continues peppering Peter's ass. A minute or so later the boy falls limply over Tony's lap.

Tony takes that as his cue to finish up and promptly raises his leg for access to his sit spots. He rains his hand down hard on the boy, wanting to make sure he will be feeling his punishment for several hours.

Smack smack "You are never to go in my lab by yourself again" Smack smack "You are not to risk your life for such a stupid reason" Smack smack "And you are not to use such foul language again" Smack smack

He replaces the boy's underwear internally wincing at the boys gasp and lifts Peter up quickly so he is once again standing between his knees. "I'm sorry Tony." The boy cries into his chest sounding much younger than he is. "I didn't mean to be bad, I didn't mean to disappoint you"

"Hey, hey. Peter you've been punished and now you're forgiven. It will not be mentioned again, but you are banned from all labs for the next ten days. No going to the lab with me. No internship."

His heart breaks as Peter continues sobbing into his chest as he rubs calming circles on his back. After several minutes Peter pulls away looking into Tony's eyes and suddenly becomes embarrassed.

"Did they…did they hear?"

It takes a second for Tony to realise what Peter meant. "No they didn't I sent everyone downstairs."

Peter falls forward again into a hug and sits himself on Tony's lap his aching bum between his knees, garnering a chuckle from the man. He moves rests his head against the man's chest tiredly and only gives a slight grunt in response to Tony's warning that he will have to be at dinner in half an hour.

Tony sighs as Peter's breathing evens out and he idly runs his fingers through his hair. "F.R.I.D.A.Y. tell Pepper to order food if she hasn't already me and Pete will be through in half an hour"

Moments later he is startled by Pepper walking in to check on them a smile breaking out at the sight of her two boys. Tears on both their cheeks.