"I wanted to be independent and move out on my own. My brother is over at my mother's a good deal of the time, anyhow, since he runs the family business - even if she technically still has the core control over it. He means well, but he irritates me far too much to see on a daily basis." To state it politely. Naill was a giant irritation to the girl, not to mention how often he clashed with Daphne.
Talk about giving her a cause for guilt. He was willing to drop his schedule at the drop of a hat to spend time with her. "How long would the meeting be? And are you sure?" He was willing to have her with her own room and he was willing to take off work. It was a confusing timeline of progression with the two of them. Though, on the positive side, at least the latest spontaneity wasn't boring.