Sec. 2. As used in this chapter, "close relative" means a person:
(1) related to another person filing a statement of economic interest; or
(2) related to the other person's spouse;
as a son, a daughter, a grandson, a granddaughter, a great-grandson, a great-granddaughter, a father, a mother, a grandfather, a grandmother, a great-grandfather, a great-grandmother, a brother, a sister, a nephew, a niece, an uncle, or an aunt. For purposes of this section, relatives by adoption, half-blood, marriage, or remarriage are treated as relatives of whole kinship.