Section 5 of The Protection Against Domestic Violence Act CAP. 151: Meaning of family member.

(1) For purposes of this Act, 'family member', means—
(a) a spouse;
(b) a child including an adopted child, a step-child and a foster child;
(c) an adult son or daughter;
(d) a parent;
(e) a sibling; or
(f) any other relative of that person who, in the circumstances of the case, should be regarded as a member of the family.
(2) For the purposes of this section, a relative means—
(a) a father, mother, grandfather, grandmother, stepmother, stepfather, father-in-law or motherin-law;
(b) an uncle, aunt, uncle-in-law or aunt-in-law of that person;
(c) a nephew or niece of that person; or
(d) a cousin of that person.