After Valerie grasped the real situation regarding her Great House of Caelestis, she realized how much of a sheltered life she had been living.
At the same time, her strong desire to explore the outside world dwindled. Even though she still wished to go outside, she didn't want her stubborn insistence to trouble her beloved family. The dangers lurking outside their family's territory were beyond her imagination.
Just as her grandmother had mentioned, her power as a Senior Witch was insignificant; it wouldn't cause any ripples in the vast world. She would not be able to count on it to preserve her life.
Thus, even if she managed to convince her grandmothers to let her out, she would have to rely on the power of the family's servants for protection, and even then, they would most likely not be strong enough to protect her from the dangers lurking outside.
Vera's fourth daughter, Vivienne Caelestis, was incorrectly written as the firstborn in CH597 has been corrected to fourth child. I apologize for any confusion caused ><