Although Biacko had ways to communicate with Crhono, they were secret ways and since Crhono didn't want to be located, Biacko couldn't do it in front of everyone, so, shortly after the demigods left to attack the Purgatory bases mentioned in Dustas' diary, he left as well.
Now in the office, only Andrew, his wives, and his guardians remained. Andrew without wasting any time said; "Fluffy, can you come back? I need to talk to you." None of those present were fools.
Everyone knew that the reason he asked Fluffy to go back inside was because he wanted to discuss something with her, without the others hearing, so, tactfully, they decided to leave the office.
Andrew, seeing everyone leaving the office, didn't say anything. It was obvious that they had understood the implications of his words. Since everyone had left the office, Fluffy didn't have the need to go back.