It was frustrating enough that Quicksilver could just disregard him without the Iron Man, but he used definitive phrases like that-- You're not, You can't-- and thought for a moment that he could give a command like that to Tony and expected him to listen. Tony would fix this, and no one else was going to control him. Just because Quicksilver was a happy puppet didn't mean anyone else should follow his shining example. As far as Pietro knew, Tony could call the Iron Man any second, and now he laid down a challenge.
"You want to find out?" Tony growled, approach no longer tentative but determined instead, disregarding or careless of Quicksilver's warning of the timer. He had said he wasn't going to kill anyone. Tony knew that was completely impossible. No one was a terrorist demolitions expert without blood soaked hands, so Quicksilver had to be forced into his decision and not allowed to be blind to it anymore. Tony's sweater hit the floor as he went, gold already covering his chest and licking along his neck.