She hadn't meant to scare him, hell she hadn't meant to scare herself. It was easier not to be scared when other people weren't freaking out around you. But she knew the look, and knew that there wasn't really any way around him making her go. He really would pick her up and take her there against her will. That's what she got for falling in love with Tony Stark.
Her hand held onto his, glad that it had stopped shaking. Most of the time she barely noticed. She gave his hand a squeeze and nodded, "Yes sir.. but honest.. like we said, that could be years away and just because I have trembling doesn't mean I'm going to.. y'know.. I promise I'll be okay."