Ji Liang and his group spent their days helping everyone screen for suspicious Female Saints. In the process, they gathered quite a bit of useful information. For instance, the Dream Control Saintess and the Beastman she intended to manipulate had to be within a certain range of each other to enter the same dream. However, once they had shared a dream, the Beastman would be marked by her and could be found no matter where he fled.
However, she required an absolutely quiet environment to use her superpower.
In other words, the noisy daytime environment was not conducive to the Dream Control Saintess using her ability.
So, Si Shuo adjusted her schedule, sleeping during the day and staying active at night for meals and other activities.
But as a pregnant female, she naturally needed a lot of sleep. She was only truly alert right after waking up or when she was absorbing Crystal Stones. The rest of the time, her eyelids felt heavy, and she could even doze off while eating.
