Matching Pairs C10 U4 LB (2)Online version Match the concepts by Morgan Cabrera 1 In laws 2 Blended family 3 Stepchildren 4 A half brother or half sister 5 Extended family are the children of one's spouse and his or her previous husband or wife. includes grandparents, great-grandparents, aunts, uncles, cousins, nieces nephews, and in-laws. includes stepparents and stepchildren, also include half brothers and half sisters. is someone with whom a person has one biological parent in common. is someone who is a relative because of marriage, like your husband's sister or your wife's father.