Fushimi Roku picked up on the undertone in the words of the noblewoman. Essentially, she wanted him to leave voluntarily, leaving Minamoto Tamako to fend for herself at the police box, and after suffering a major setback, she'd obediently resign and return home to inherit the family business.
It seems their mother-daughter relationship isn't very harmonious.
Come to think of it, how could those Japanese elites possibly let their children become grassroots civil servants? Rather than climbing up from the bottom as a police officer, it's better to apply to East University for a law degree and become a prosecutor after graduation... Only someone like Minamoto Tamako would give up a mountain of wealth at home to become a famous detective or police chief.
Fushimi Roku hung up the phone, feeling quite relieved.