So here is a bit of background:
I started home educating my children this year and it is the best decision I ever made.
My niece also lives with us, she has lived here for the past 3 years. We don't have any formal or legal paperwork, she came to live here instead of the social services taking my SIL to court to remove my niece from her care. My SIL rarely comes to see my niece, probably once every few months (when she can be bothered to show up).
My niece has recently been asking if she can stay at home, and be home educated along with my children. SIL is against this (I asked her when I removed my children from school).
My question is would it be possible for me to remove her from school without her mother's permission or will I have to tell her she has to go to school even though she doesn't want to? Can anyone help?