It wasn't like she was worrying!! She was just.. curious, that was all. Yes, of course she would be curious if he suddenly vanished right behind her, it was only natural, geez..

But still, she wasn't on to his plan at all. Even if part of her might have realised he was hiding, it didn't quite connect with the part of her brain that hold her he would embarass her, so she was - without knowing it - walking closer and closer to where Amakusa was hiding..