Not sure where you are reading it from, but in the original post, its no where mentioned that its step grandmotherIf you read the posts you’d realize they are in fact a stepgrandparent and the biological/legal grandparent is deceased. So no they do not qualify for a supervisa and would not be considered a family member for OP or their father unless he had been adopted. The step grandparent would have only qualified as the dependent of the grandfather but because he is deceased they don’t qualify.