Slight disagreement, but staying on topic i'm not sure I agree with home schooling. If you come to a kuffar country or born there, you should look at giving your children the ability to face their kuffar neighbours. If children are home schooled how will they know how to deal with certain situations they might come up against when in a kuffar country. Obviously i don't know the full situation the sister is in, nor the country but I talk of home schooling generally, especially for muslim children in the west. Conventional school not only teaches subject matter but about things like teamwork which are practical skills which are needed when e.g. the child goes on to university. I believe as long as the parents give the child "unconditional love", the child will never do anything that they know will hurt their parents. I know people who kept off ciggarates/drugs not because if their parents find out they will get beaten black and blue but because if they find out the mother will probably not eat for a week out of sadness and cry herself silly.