Bart is Lisa's...
son
brother
Marge is Homer's...
sister
wife
Clancy is Selma's...
father
uncle
Abraham is Mona's...
husband
Maggie is Ling's...
cousin
Lisa is Patty's...
niece
aunt
Homer is Abraham's...
Selma is Ling's adoptive...
mother
daughter
Bart is Herb's ...
nephew
Maggie is Marge's...
Herb is Marge's
brother-in-law
Patty is Selma's...
Herb is Homer's...
half-brother
Abraham is Marge's...
father-in-law
Herb is Maggie's...
Jackie is Homer's...
mother-in-law
Marge is Herb's...
sister-in-law
Homer and Marge are Lisa's...
parents
fathers
Homer is Clancy's...
son-in-law
Bart and Lisa are Maggie's ...
brothers
siblings
Abraham is Lisa's...
grandfather
Bart and Lisa are Marge's...
grandchildren
children
Maggie is Jackie's ---
granddaughter
grandson
Clancy and Jackie are Bart's...
grandparents
parents-in-law
Homer is Ling's...
Selma is Maggie's