in Section 11-0.1 of this Code; and

other person as follows: (i) Brother or sister, either of the whole blood or the half blood; or (ii) Father or mother, when the child, regardless of legitimacy and regardless of whether the child was of the whole blood or half-blood or was adopted, was 18 years of age or over when the act was committed; or (iii) Stepfather or stepmother, when the stepchild was 18 years of age or over when the act was committed; or (iv) Aunt or uncle, when the niece or nephew was 18 years of age or over when the act was committed; or (v) Great-aunt or great-uncle, when the grand-niece or grand-nephew was 18 years of age or over when the act was committed; or (vi) Grandparent or step-grandparent, when the grandchild or step-grandchild was 18 years of age or over when the act was committed.