No, the girls from t.A.T.u met when they were in a children's choir together called Neposidi, and were both selected for the band t.A.T.u by the band's manager Ivan Sharpovalov.
It depends. You may be stepsisters- your parents split up and your Dad gets a new wife and has a daughter, your sister. What if they brake up and your sister's step mother has another child? Then no,...