[JARVIS notified Pepper halfway through the conversation that the two men were having. She didn't know what was happening, but since neither of them had seen fit to notify her, she was going to find out on her own.
That was why when Bruce turned towards the elevator the doors slid open she was standing in the elevator with a worried expression on her face.]
What's going on here? [It's a quiet, worried question and her eyes dart between Bruce and Tony while she asks.]