To give time and space for Intan to accept everything, Phoenix stayed away from Han's mansion. For the time being, she stayed in Qin's mansion with Ashton and the twins.
Since the Qin's found out that Sky and Sienna were Ashton's biological kids, Sky and Sienna had been staying at the Qin's mansion.
Old Master Qin also had arranged their documentation to state that Sky and Sienna were Ashton's kids and changed their surname.
Thus, instead of Skylar Li and Sienna Li, both of them were now bearing the surname Qin, Skylar Qin, and Sienna Qin. (I'm not sure if I ever mentioned before that Sky's full name is Skylar.)
This new arrangement wasn't hard to accept for Sky and Sienna since they were already accustomed to staying at the Qin's mansion. The Qin already had a room set up for them long ago.