As a reminder, if it is in italics, it is translated from Sokovian. 

Billy and Tommy looked at the photograph for a moment before looking at each other, an uneasy feeling settling in their stomachs. Captain America had shown them a photograph of 'Hulk' destroying a city in California just an hour previous, yet Banner was with the Avengers and hadn't left their sight for a number of hours, so it obviously wasn't him. Steve thought that Hydra was involved and had come to the twins for an explanation. 

Only, the twins had no idea who was in the photograph and told the Avengers so.

Tony narrowed his eyes. "Wait. Wiccan."

"Yes?" Billy raised a brow.

"You said you had the ability to transmutate objects and other people, correct?" Billy nodded slowly, having a feeling he knew what Stark was getting at. "How do we know you didn't create this...fake Hulk for Hydra?"

"Uh, because my brother and I have been with you for the past day and a half?" Tommy answered, stepping slightly in front of his twin with a glare on his face. "And because we aren't willingly working for Hydra, so if we aren't with them, why would we do their bidding?"

Pietro narrowed his eyes at his fellow speedster. "Wiccan could've made it when you two were with Hydra for all we know."

Tommy looked at his younger twin, noticing the way his anxiety was rising. He whispered lowly to Billy, too low for the Avengers to hear. "Do you want me to get us out of here?" Billy nodded slightly. Tommy turned back to the Avengers with a snarl on his lips. "If you were not so trigger happy and accusatory towards Billy, maybe we would have helped you get to the bottom of this mystery. But it is like they say; if you want it done right, you must do it yourself."

Billy saw Tony's finger twitch towards his Iron Man armor and his eyes widened. "Tommy, now!"

Tommy aimed his hands at the computer in the corner, sending a hyper-kinetic vibration at it. The computer exploded, making the Avengers duck behind Wanda's psionic shield. Tommy picked up his brother and bolted out of the lab towards the exit of the compound. 

"Friday! Lock down the compound!" Tony yelled, suiting up. 

Tommy skid to a stop at the exit of the compound as a nanotech barrier appeared, stopping the twins from escaping. The white haired twin looked to his brother. "What do we do?"

Billy's eyes began glowing light blue as well as the palms of his hands. He fired a concussive blast of energy at the nanotech barrier, disintegrating part of it. He nodded at Tommy, who started to run away with Billy in his arms once more. They made it far away from the complex before the Avengers even made it to the barrier, having been disoriented by the explosion. 

Pietro grunted, punching the wall. "Damnit!"

Wanda placed a hand on her brother's arm to calm him down. "Pietro, we will find them."

"Will we?!" Tony snapped. "Because they already ditched the tracers in the suits we gave them, so I don't know how you plan on tracking them."

"Yes, I am rather quite sure that we will find them." Vision joined the conversation, exuding calm.

"How can you be so sure?" Natasha asked, examining the damage to the building as she questioned the synthezoid.

"They are connected to the Mind Stone in my forehead, as are the Maximoffs. I can...sense them, as well as their intent. They mean no harm." Vision spoke simply and concisely. 

"No harm?! They just tried to blow us up!" Sam cried out.

"They're scared kids who were pushed into a corner and accused of a terrible thing. They were thinking of only survival and sticking together." Steve stood up for the twins, understanding where they were coming from. "They did what they thought they had to do."

A boom of thunder was heard from outside and a flash of lightning blinded the group of heroes. They ran outside to see Thor standing there with a distraught expression. He looked to his fellow Avengers, his face holding nothing but bad news. 

"Hey, Thor. How was Asgard?" Rhodey asked.

"Loki is missing." Thor got right to the point. "Not even Heimdall can see him."

"Great. Not only do we have two fugitive mutant twins with the power to alter reality and blow up our complex, now Loki is missing and could possibly be gearing up to try and take over Earth again?" Tony groaned. 

A car engine interrupted the Avengers before anyone could speak. They all turned to see a black SUV pull up right next to them. The engine cut out and the doors opened, out stepping Clint Barton, Maria Hill, and Nick Fury. Fury took a look at the hole in the complex wall and sighed. "I take it the twins escaped?"

All eyes went to Natasha, who shrugged. "What? I told him about them as soon as we discovered their existence."

Clint looked at Thor. "I over heard something about Loki. What is it?"

"He's missing, Clint. He isn't on Asgard and nobody knows where he is, not even Heimdall." Rhodey informed the archer. Clint narrowed his eyes but said nothing on the subject, instead inquiring about the twins. "They are powerful mutants...and also Vision and Wanda's children."

Clint blinked. "Say that last part again." Vision explained about the twins creation and Clint growled. "Oh, I am going to kill them for violating Wanda."

Wanda glared at Clint. "It isn't their fault, Clint. Blame Hydra, not Billy and Tommy."

Pietro turned to his sister. "What did you call them?"

"Those are their names, I heard them call each other by them. Wiccan is Billy and Speed is Tommy." Wanda jut her chin out. She wasn't sure why she felt so  defensive of the boys, but when Clint said he was going to kill them she was just filled with...rage.

Fury turned to the Avengers, addressing them as a whole group. "Let's move to the conference room, we have a lot to discuss." Everyone followed the director of SHIELD into the compound and up to the conference room. Fury pulled up on the holographic screen a video of the fake Hulk in California and Banner looked away. Fury continued.  "That isn't a construct or a transmutation by Wiccan."

"How do you know?" Steve asked sincerely. 

Fury looked at each of the Avengers carefully. "I know because I have dealt enough with them to know a Skrull when  I see one."