Fleur was very pleased with the performance of the three at this moment. What she wanted was their unquestionable obedience. Otherwise, she wouldn't have taught them the technique to activate their pineal glands in the first place.
Furthermore, the technique Fleur taught them was somewhat incomplete. Although they had been cultivating in seclusion for a hundred years, without Fleur’s external assistance over the last few years, the three of them would never have been able to activate their pine