(g)degrees of prohibited relationship two persons are said to be within the degrees of prohibited relationship(i)if one is a lineal ascendant of the other; or(ii)if one was the wife or husband of a lineal ascendant or descendant of the other; or(iii)if one was the wife of the brother or of the father's or mother's brother or of the grandfather's or grandmother's brother of the other; or(iv)if the two are brother and sister, uncle and niece, aunt and nephew, or children of brother and sister or of two brothers or of two sisters;
