Zou Yi and the other secret guards had not withdrawn from Jingyue until now. At this point, Jiang Yue and Xue Yan already knew in their hearts.
Sifu listened to them and did not guard against Princess Jin. He had told Princess Jin everything. Princess Jin naturally could easily deduce that they had arranged for someone to be in Jingyue. Therefore, at this moment, when they heard Princess Jin say this, they were not surprised.
Moreover, this would be their sister-in-law in the future. They could see that Sifu and Princess Jin had sparks. They wouldn't play any tricks or fight.