"Ghost mother" is not an official name.
Ghost mother
Gender Female
Animal Cat
Hair color Blonde
Residence Castle Manor, Elwood City
Family Husband,
Cartoon debut "The Fright Stuff"

A mother ghost appears with her family in "The Fright Stuff." She was knitting (despite being a ghost) while her husband talked to their daughter why scaring people is wrong. She later went down to the party with her family, ironically wearing ghost costumes. The cause of death for this character is unknown.