A/n: This was requested by VampireQueen666 on Ao3!
"I still don't get why we're the ones who have to stay behind and watch him," Pietro whined. "He's like- a toddler."
Wanda rolled her eyes, "Peter is fully capable of taking care of himself, we're just here to make sure everything goes okay." This didn't make Pietro any less annoyed.
"Fine, but why us?" Pietro asked, turning towards his sister from where he was lounging on a chair in the living room of the Avengers Tower. Wanda shrugged, "We're closer in age to Peter than any of the other Avengers, and I don't think they needed us for the mission they're currently on."
Pietro scowled, hating that they were the ones who had to stay behind and babysit while the other Avengers got to go on a mission. "It's just not fair," Pietro whined again, not caring that Wanda was getting more and more fed up with his complaints.
"I get it, Pietro, I do," Wanda said sincerely, "I would rather be out on a mission right now too, but there's nothing we can do about it right now except wait here and make sure Peter doesn't do anything stupid." Pietro seemed to accept this, turning back around in the chair.
"So what do you like to do?" Wanda asked Peter, standing awkwardly in the kitchen while Peter made breakfast. Peter shrugged, thinking, "Uhm, I guess I like science, and making stuff."
There was awkward silence in the kitchen until Pietro strolled in, "Good morning," He grunted out, going straight for the coffee machine. "Oh uh good morning, I made eggs, if you want some. I mean- if you don't like eggs then that's fine. Not everyone likes eggs- you know what, never mind. Forget I even said anything-"
"Chill, Spider-kid. I'll take eggs," Pietro cut Peter off, already taking a plate out of a cabinet. Peter served the twins, piling the rest of the eggs onto a plate for himself.
They all awkwardly sat around the dining table, quietly eating their eggs, Pietro drinking his coffee. "You really gonna eat all those?"
Peter looked up, already halfway through the mountain of eggs, "Uhm, yeah, I usually eat a lot. So," he shrugged.
The silence resumed soon after.
"So Peter, do you have any plans this weekend?" Wanda asked kindly. Peter paused for a moment, "Yeah, actually." "Well we had to stay back to watch over you, so whatever you wanna do, we just need to make sure it's Tony-approved."
"Oh, well I'm just going to my friend Ned's house to hang out," Peter shrugged, "Tony lets me go all the time."
"Then there shouldn't be a problem." Wanda smiled, "When are you going over to Ned's house?" Peter shrugged, "Sometime after dinner, Ned and I usually hang out late on the weekends," Light conversation continued after that.
Later that night after dinner Peter packed his bookbag full of bottles, making sure to keep quiet to not let Wanda or Pietro know what was going on. When Thor had last come to earth, he had left him, Steve, and Bucky each with a couple of bottles of what he called "godly liquor" that he guaranteed to get even the three of them drunk.
Steve had given Thor a glaring look, that of a disappointed parent when Thor gave Peter some alcohol bottles of his own. Thor pretended to not notice, and instead made a hasty retreat, leaving for Asgard quickly.
As soon as Thor was gone, Steve gave Peter a pointed look. "Peter, I'm going to have to ask you to give me those bottles right now. I'll give them back, once you're of age." Peter didn't have the heart to go against Captain America, least of all a disappointed-mom-Steve, so he handed over the bag of alcohol.
A couple of days later, Bucky walked quietly into his room, a bag in hand. He held the bag out in front of him, "Here, just don't tell Steve I gave you this, capische?" Peter smiled, "Capische."
Now, Peter was grateful Bucky had given him the alcohol back. The decathlon team had all been invited to their newest member, Alex McGreen's house for a party they were throwing to celebrate their most recent win. As this was a party with alcohol, Alex had confirmed, Peter needed to make it possible for him to get drunk like the rest of them.
Testing it out with Ned, they had both realized pretty quickly that neither of them knew how to act drunk, so he couldn't just pretend to be drunk at the party.
Peter had off-handedly brought up the alcohol he had from Thor when talking about what could get him drunk, and Ned had lit up. He gushed about Thor and how could Peter not possibly tell him that Thor had given him something?
So a plan was put in motion. Peter would bring the alcohol to the party, and spike his own drinks with the much stronger alcohol.
So here Peter was, trying to smuggle the bottles out of the Tower, past Pietro and Wanda. Peter walked into the living room where the twins were sitting on the couch, Wanda watching TV and Pietro scrolling through his phone. "I'm headed out now."
Wanda looked up, "Okay, have fun. Text us if you need anything." Wanda looked expectantly at Pietro, who grunted in goodbye. Peter waved again, walking to the elevator.
Peter rang Ned's doorbell, Peter only had to wait for a minute before Ned opened the door. "Hey dude," Ned's eyes widened when he saw the bag slung on Peter's back. "Did you get it?" Peter nodded, Ned pulling Peter into the house and up to his room.
They hung out in Ned's room until the time of the party. When it was time to go, they took an Uber to Alex's house, the alcohol in hand.
The party had already started when they got inside, making it easy for Peter to spike his drinks. Not long after, Peter started to feel the effects of the alcohol. It was unlike anything he had felt before, all his cares seemed to melt away.
Soon after that, Peter blacked out. He kept partying, but he couldn't remember a single thing.
Peter stumbled to the elevator, unable to see straight. He had barely been able to type his address in for the Uber driver, the man just shaking his head as he got in the back of the car.
As the elevator dinged, signaling he arrived on his floor, Peter walked out of the elevator. He walked three steps forward before crashing to the floor. His fall made a loud crashing sound, made even worse as Peter tried to get up, only to crash to the floor again.
Peter tried to get up for the next couple of minutes, only stopping when he realized someone was standing in front of him. He looked at the bare feet in front of him, looking up at the man's body until he reached his face.
He knew this guy. What was his name? Patrick? Paul? Peter? No, that was his own name. Oh! "Pi… Piet…ro," Peter's voice slurred as he tried to sound out Pietro's name.
Pietro sighed, 'This idiot.' Pietro looked at the teen in front of him, sprawled on the floor unable to get up. He could smell his BO from here, Peter absolutely reeked of booze and sweat. "Wanda! Come here!" Pietro yelled out, calling his sister over. She would know what to do.
His sister walked out of her room, shuffling over until she saw Peter on the floor. She gasped, "Peter!" She ran over to him and kneeled on the floor next to him.
Wanda was about to reach out to touch his shoulder when she stopped abruptly. Pietro could tell she noticed the smell. "Is he drunk right now?" Wanda asked, disbelief obvious in her voice. Pietro scoffed, "The idiot got drunk, and judging by how he smells like sweat, he probably wasn't just at his friend's house. Unless that friend was also hosting a party at the same time."
Wanda glared up at Pietro. "You know what, since you have shown no care or interest in him this entire time, you can deal with this. And be sure to actually take care of him, or else I'll know."
Peter took that exact moment to lurch up from where he was sitting and threw up all over himself.
Great. Just great.
Pietro groaned, and Wanda just chuckled at him. "You better get a bath running. Make sure he's clean before he passes out." Pietro rolled his eyes, "Why me?" He mumbled to himself as he took off Peter's soiled shirt.
Leaving the mess in front of the elevator to deal with later, Pietro picked up the teen bridal style. Pietro brought him to the bathroom and started running the water, testing the temperature.
Once it was slightly warm, Pietro plugged the drain, allowing the water to fill the tub up. Pietro put Peter in the water, stopping the tap. Peter tried to take a washcloth and scrub himself clean, but could only rub in one spot on his chest.
Pietro sighed again, "Alright kid, let me help." Pietro took the washcloth and started to clean the vomit off him. During the entire bath, Peter was mumbling about the room spinning Pietro just chuckled. The kid would learn later when he was suffering from the hangover from this whole mess.
Pietro dried Peter off after he finished cleaning and rinsing the soap off him. He changed him into PJs, grateful that Wanda had at least gotten him some clothes for him to change Peter into.
Unplugging the drain, Pietro brought Peter back into the living room, getting him a bottle of water and some Advil. When Peter protested, Pietro just put the pills into Peter's hand. "You'll regret it later if you don't drink this now."
Peter grumbled but swallowed the pills, chugging some of the water as well. Peter sat the water bottle down on the coffee table and slumped onto the couch. He didn't notice where he was lying until he felt someone shift under him.
Wanda had been napping on the couch when she felt something fall into her lap. Wanda opened her eyes to see Peter, already asleep. She looked up at her brother, "He must have been tired."
Pietro chuckled, "Must of." Pietro walked over to them and picked up Peter's legs, slipping under them. "Might as well keep him company so he can explain all this in the morning."
Wanda gave Pietro a knowing look but settled back into the couch, closing her eyes to fall asleep again.
The next morning, Peter woke up with a raging headache. "Oh my god… what is…" Peter mumbled, even more when he heard laughs near him. Peter looked up to see Wanda and Pietro staring at him, mirth on their faces.
"So Peter, care to explain why you came home yesterday drunk as hell?" Pietro asked, crossing his arms in front of his chest, raising an eyebrow in question. Peter groaned, sinking back into the coach realizing he had been caught.
He and Ned really should have thought of a plan for after the party, but of course not.
Peter mumbled something about him and Ned going to a party, hoping that Pietro and Wanda wouldn't be able to hear him. No such luck. They gave him an unimpressed look.
"You know what, Peter, since I know you're probably suffering right now and are going to be suffering for a while after this, I think I'll let that be punishment enough for drinking and sneaking out to a party," Pietro smiled.
Peter groaned again on the couch.