The daughter was an adult when CGE left BRE and capable of making her own decisions. It's only with hindsight that we make these judgements.
I'm guessing from the step-daughter's POV, her step-dad was important enough to her, for her to stay behind and continue living with him, even though her mother's relationship with him had deteriorated. Look at ALL those years volunteering at LA's! The step-daughter probably adored him for that.
Also sometimes 'children' don't always 'see' whats going on in their parent/step-parent relationships. Everyone can turn a blind eye to goings-on in houses - even adult children.
Of course I'm just speculating, but its important to see the whole picture.
FUrthermore, the accused may have treated VRG totally different to the way he may have treated GGE. I reckon domestic violence could be an issue, but again just speculating. I imagine the accused could be quite controlling given what little we know about him.
And that's just it - We just don't know enough.
Either way - both of these women, CGE and VRG, are now 'victims by association' with the accused.