It was one of the things that Antoine so loved about being the eldest - Amie tended to rush to him, worried about upsetting him. Selfish, yes. But perhaps that was why he was so focused on position. He wanted others to do the same. His brother could have requested that he leave - this was after all the sitting room that he allowed his brother to use. It showed good manners that he didn't - he was very proud, although he'd never say so.
Raising his eyebrow, he made sure that his face showed no emotions. He had plenty going on under the surface and thus it was important that no one know that. Gesturing with his hand, he made a motion to let his brother know that he should go on. He was sure that if he spoke now, his anger would show. He couldn't believe that his brother had sunk to advertising in the Times. And, he hadn't even asked permission first.