Today was going to be a good day. Peter was spending the weekend at the Compound and he and Natasha had already made plans. Early in the morning while everyone else was either sleeping or out running, Peter sprung up out of bed and rushed to meet Natasha. He had brought all the supplies the night before and now they had plenty of time to set up what Peter considered the Greatest Hijinks of All Time. It wouldn't be easy and there was a chance someone would catch them, but replacing everyone's styrofoam weapons had been too great of an opportunity to pass up.

"I've got Cap's shield," Peter said, running out of his room.

Natasha quickly replaced it with the styrofoam shield and they ran upstairs to Peter's room. They hid Steve's shield and grabbed the styrofoam Mjolnir and bow and quiver. While Peter carried the bow and quiver, Natasha carried Mjolnir and tried not to think about how she would have to have Peter grab it instead.

"Go grab Clint's first," she instructed.

Peter nodded and ducked into Clint's room. Meanwhile, Natasha hurried down the hall to Thor's room to wait for Peter.

"Run!" Peter yelled from down the hall.

He didn't stop in Thor's room and as Thor stirred, Natasha panicked. She grabbed Mjolnir, replaced it with the styrofoam one and ran after Peter. Just as Clint came flying around the corner, she slammed the door and bolted it.

"What happened?" she asked, leaning against the door.

"I woke him up," Peter grinned shyly, "Now he had the styrofoam bow and the real thing." Natasha rolled her eyes and Peter grinned. "You have Mjolnir!"

Natasha looked down and sure enough, she was holding Thor's hammer. Her eyes widened and she dropped the hammer.

"It must be a fake," she murmured. She'd never needed to lift the hammer to know she wasn't worthy.

"I don't think it is," Peter said, staring down at the hammer.

Natasha carefully picked the hammer up and stared at it. She still didn't think it was real. Just to be sure though, she opened the door and let Clint stumble inside before handing the hammer to him.

"You two are so dead!" Clint grumbled, pointing at them. Natasha nudged him with the hammer and he turned to look at it, confusion written all over his face. "Oh, is this the fake one you made for Thor?" Clint asked, "It looks pretty real. Maybe I could use it to trick Tony into thinking—"

He took it from Natasha and it immediately dropped to the floor. Clint frowned and tried pulling it up, but it wouldn't budge. Natasha couldn't move.

"I told you it was real!" Peter exclaimed, grinning.

Natasha looked up from the hammer and Peter stopped smiling.

"What's wrong?" he asked, noticing the tears in her eyes that she was furiously trying to hold back.

"It made a mistake," she said softly. She stared down at the hammer that was now on the floor and neither Clint nor Peter made a sound. "I'm not worthy of it. It made a mistake."

"Mjolnir never makes a mistake, Lady Romanov," Thor said from behind them. His voice was surprisingly quiet as he stepped into the room. "It has chosen well."

"I'm worthy?" Natasha asked, looking up at Peter and Clint. They both nodded and a tear trickled down Natasha's cheek.

"You could never be unworthy, Auntie Tasha," Peter said, moving forward to hug her. Natasha was still in a daze but hugged him back. She kissed his head and smiled up at Clint and Thor.

"Now, if you don't mind, I'll be taking my hammer back," Thor said. Natasha nodded quickly and Thor picked it up from the floor. He nodded at them and left, shutting the door behind him.

"So, why am I not worthy?" Clint whined, receiving a flick to the head in return.