Natasha still hadn't come round by the time Gavrok reappeared (presumably the next day, but they still had no way to track the time), smiling at them all

"Any further thoughts Captain Rogers?" he asked

Steve shook his head, he was almost glad he didn't know the secrets about the serum; just looking at Natasha, he wasn't sure he'd be able to stay strong enough to keep it, and he was sure if Gavrok had wanted information from Clint, he'd have gotten that by now too.

"What a shame" Gavrok commented, moving to open Clint's cell again

"Don't" Clint asked, he meant to sound forceful, but it came out as more of a plea

"Oh Agent Barton, are you begging?"

The glint in Gavrok's eye made Clint furious, but anything that may help keep Natasha safe would be worth trying

"Yes. Please don't take her again. Take me instead! Please?"

"I don't think so... I think watching the woman suffer is having more of an effect on your dear Captain than if I were to take you, but I will give you this" Gavrok flashed a small brass key to Clint, and threw it to the floor as he lifted Natasha, taking her away once more.

Before leaving completely, he turned back to the cells; "Oh and Mr Stark, the lovely Miss Potts will be here shortly"

The key Gavrok had thrown had slid through the bars and into Tony's cell, sadly he slid it back, as close to the archer as possible.
A few moments later Clint's writs were free

"Why do you think he did that?" Tony asked, referring to Clint's hands

"I don't think he's bringing Natasha back" Clint answered miserably, a bout of panic rising in his chest as he thought of his partner

"I hope he's just playing mind tricks, I'm praying to God he doesn't have Pepper" Tony said, hoping to distract Clint from Natasha's unknown fate. Tony knew if Pepper were here, if he and Pepper were in the situation that Clint and Natasha were in; he'd tell Gavrok everything, he wouldn't be able to stop himself.

"Shield should have eyes on her, since we were all taken..." Clint tried to assure him, but he wasn't putting anything past Gavrok.
Both men were trying to make the other feel better, as Steve sat, desperately trying to figure a way out of this horrific situation; he'd give his life if it mean his teams safety, he had no doubt.