Mona is Bart's...
Grandmother/Grandma
Homer and Marge are Bart's...
Parents
Marge is Homer's...
Wife
Homer is Marge's...
Husband
Bart, Lisa and Maggie are Marge's...
Children/Kids
Lisa is Maggie's...
Sister
Bart is Maggie's...
Brother
Selma and Patty are Lisa's...
Aunts
Herb is Bart's...
Uncle
Bart is Herb's...
Nephew
Bart, Lisa and Maggie are Ling's
Cousins
Lisa is Mona's...
Granddaughter
Bart is Jacqueline's...
Grandson
Ling is Patty's...
Niece
Lisa and Maggie are Herb's...
Nieces
Bart, Lisa and Maggie are Clancy's...
Grandchildren
