Any of the following people, whether or not they’re traveling with you:
spouses and common-law, civil union and domestic partners;
parents and step-parents;
children and step-children (including adopted or soon to be
adopted children);
siblings;
grandparents and grandchildren;
the following in-laws: mother, father, son, daughter, brother, sister;
aunts, uncles, nieces and nephews;
legal guardians and wards;
business partners;
paid, live-in caregivers; and
service animals (as defined by the Americans with Disabilities Act).