Same situation as the last one. Taken from my fanfiction.net account.

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Peter woke up on Saturday morning feeling... not good. To put it lightly. He couldn't let the rest of the Avengers know, because they had a mission.

So, he stumbled out of bed and towards a bathroom. He composed himself and made his way to the kitchen.

"Hey buddy! How are you? We are working getting you a babysitter. Groot is being dropped off at ten. You okay?" Tony greeted the boy and Peter nodded.

"Just tired. Who's the babysitter? I don't need one by the way." Peter shot Tony a nasty look.

Thor entered the room as Tony laughed and his booming voice said, "I have found a sitter for the baby! The man of Spiders will be mightily supervised."

Tony looked doubtful, but shrugged, "Okay. Let's go." He gave Peter a hurried goodbye and they left.

Peter sat idly, and then Friday's voice spoke.

Your babysitter had entered the building.

Peter thought she sounded almost disgusted, but he shrugged it off. The elevator door dinged and Peter turned to see who would walk out. When he did, he froze.

In turn, the visitor did too. "No, no, no!" Loki shouted. " Brother! This is not what you told me was going to happen! " He turned to Peter with a pained smile. "You're probably scared. I won't kill you unless you deserve it."

Loki waited for the scream, a cry, anything to show fear. He did not expect an excited giggle.

"Oh my gosh! It's you! This is sooooo cool! Do mind if I hug you? I'm gonna hug you." Peter gave Loki a hug and Loki frowned.

"I am Loki Odinson! Who do you think you are to hug me?"

Peter thought for a moment after detaching himself from Loki. "I dunno. My name Peter. Can we play tag? " Peter touched Loki. " Tag, you're it! "

Loki sighed and trudged after Peter. "This is not what I signed up for."

After a while, Loki was genuinely enjoying himself. Once they collapsed in a heap on the floor, it was about 10:00.

"Groot should be here soon! Let's go, Mr. Loki!" Peter zoomed off just as the elevator opened.

"I am Groot!" Groot whined over his shoulder as Rocket waves to him.

" enjoy yourself. You spend too much time on video games. " Rocket yelled as the doors began to close.

Peter went to welcome Groot, but had a coughing fit and fell over. Groot yelped and crouched down beside him.

Loki sighed again and learned down next to him. "Don't be sick. Don't be sick. Please for the love of Frigga, don't be sick."

Peter currently has a 102.3 fever, a sore throat, a headache, and feels mildly dizzy. A box of tissues wouldn't hurt as well. Should I notify Boss about this, Loki Odinson?

Loki didn't seem surprised that Friday was there.

"That will not be necessary. Come, twig, let's move him to the couch."

Groot grumbled a bit, but helped.

Once they were on the couch, the trio played Monopoly. Astonishingly enough, no one got killed. Not even slightly maimed.

After that, Peter had passed out for a bit.

He woke up soon and looked up at Loki. "Can we watch a movie, please?"

Loki tried to deny the boy, but Peter looked up cutely, snot dripping down his nose.

" Gross. Wipe your nose. And fine, If you insist we can watch a movie. "

Peter and Groot cheered and Groot put a movie in after retrieving some popcorn.

Peter eventually nodded off, his head resting slightly on Loki's chest. Groot soon followed, his head ending up on Loki's lap. Loki was not happy, but his arms snaked around their shoulders as he, too, drifted off.

Sir, the trio is asleep. Proceed quietly.

"Thanks, Fri." Tony entered the building cautiously.

When he saw Loki, he growled softly. He creeped closer to see Groot and Peter asleep on Loki, who was also asleep.

Tony smiled. "Aww. Friday, snap a few pictures."

after being notified that the picture was taken, he gently shook Peter awake. Peter Sat up fast, waking up the other two.

"I swear Stark. Don't tell Thor." Loki threatened Tony, but with no real meaning.

Peter hugged Loki goodbye and he left before the other Avengers arrived.

So. That's how a teenage boy managed to work his way into a frost giant's heart, and began to secure the trust between Loki and the Avengers.

(So may be He loved it when Peter slipped and called him Uncle. Stark doesn't need to know.)

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How was it?