Although she's willing to listen in on Sakura and Fxeni's conversation. She turns her attention to Calien, who she seems to suspect in her argument earlier.
Toshi - "Was he really planning on defending his daughter? Then why was I hesitating?" She thought to herself. As she followed the crew as if to learn more from Aya.
(Although I want say that she may have been aware of his presence when, she and Sakura were arguing. I'm not sure how to describe it, but I didn't want to make it look like she knew that he was there. In other words she was probably hesitating, in a way.
Or wait I think I know why she hesitated, she has two spiritual familiars warning her of Caliens presence, while trying to get her to calm down. I may have introduce them though.)