Nicholas and Daniel's arrogance blinded them to the forces lurking nearby to monitor their every move. Calix was already aware of their attendance at the auction hosted by the Chang family.
Master Chang was one of Andrian's friends in high society. The former often organized an auction, mostly to fundraise for the good causes supported by his elderly mother.
Master Chang invited Andrian and Harper but, the spouses had already planned to head abroad for a short trip. As always, Calix stepped in to represent his parents.
Whatever Nicholas and Daniel might have in plan, Calix and his security team would remain vigilant. They couldn't afford to lose under the two deceptive guys' trickery.
At the same time, Calix also didn't let Nicholas and Daniel bother with his peace too much. He continued spending more time with Leslie and Calliope as usual, forsaking the unnecessary social events.