Did he think she was playing around with him?

“Well, now that I've told you what I called to say, I'll hang up now. I have work to do," she said and hung up immediately

Isaac looked at the phone and smiled, seeming deep in his thoughts Willie turned around in this moment and saw Isaac smiling. With raised eyebrows, he asked curiously, "What's funny?"

The smile on his face fell instantly. "Is it your business?"

“No, I'm sorry," Willie quickly said and turned away.