In all Australian states and territories besides New South Wales, sexual intercourse concerning a lineal ancestor and a lineal descendant is incest. In New South Wales, incest entails "near close relatives", that are "mother or father, son, daughter, sibling (which includes a 50 %-brother or 50 %-sister), grandparent or grandchild, https://francesj912ecz1.bloggerchest.com/profile