Why would boo smile timidly at the speaker?

Boo might smile timidly at the speaker due to a mix of shyness and curiOSity. This kind of smile often indicates a desire to connect while also feeling a bit uncertain or vulnerable in the situation. The speaker's presence may evoke feelings of warmth or safety, prompting Boo to respond with a gentle, cautious smile. Overall, it reflects a blend of enthusiasm and apprehension in social interactions.