Bruce had to give Tony something to ease his pain. He knew the man was in agony. Tony was looking at her "Listen Pepper. telling you this could put you in danger, I don't want you hurt, You and Bruce cant tell anybody."
He looked serious as he was talking to her. He was coughing "I have used it in my invention yes. And I have had contact with it." He really didn't want anybody else knowing. He couldn't endanger those he cared about.
Tony seemed to be sweating and he curled up in pain.

Bruce was looking at her "We need to find out more about this element, Maybe get JARVIS to run some scans. I can understand it making him sick, But the rage...," He was trying to think. Tony had no idea the element wasnt of earth and had Asgardian orgins.
He hoped Pepper and Bruce weren't in trouble now that he had told them.
Tony was close to passing out again as his body was just been so worn down.