The message is that the girl, who is about to be married, was completed busted by the mercenary.  She does not want to call her out in front of the mother.  It can be assumed that the young girl knew she was being followed and panicked by attacking this man.  She was in complete shock when she heard that the man was a police officer.  The shock on the two women’s faces when they saw Sir Te at their door was also a sign that they were guilty of knowing, or doing, something.