女婿 son-in-law;

　　媳妇daughter-in-law

　　姊夫/妹夫 brother-in-law;

　　嫂子 sister-in-law;

　　堂兄弟姊妹cousin;

　　独生子only son;

　　血亲 blood relative;

　　单亲 single parent

　　继子 stepson;

　　继女 stepdaughter;

　　亲生父母 birth parents;

　　养父母 adoptive parents ;

　　寡妇 widow ;

　　鳏夫widower ;

　　外公 grandfather;

　　外婆 grandmother;

　　养父母adoptive parents;

　　养子adopted child