Jadis' Daughters

Elizabeth and Miranda are twins.They are the daughter of Jadis.
At the start of the story they are 100 years old.
Elizabeth does not support her mother while Miranda is the most loyal supporter of Jadis.
What happens when they meet the Pevensie children?
Will Miranda still continue to support Jadis or will she change her alligence?

I do not own any characters except Elizabeth and Miranda and a few plot lines I have added.