Mervin Monroe - Martha Prince

Martha Prince, voiced by Russi Taylor, is the wife of Martin Prince Sr. and mother of Martin Prince. Martha is probably best known for attempting to sell Martin's extremely valuable Star Wars merchandise to Comic Book Guy for an extremely cheap price. She was warned by Bart and Milhouse before she sold them and decided to not to sell them. It was also hinted by Martin that she shoplifts a lot, "stuff she doesn't even need". She also was responsible for all of the guests getting sick at Martin's birthday party, by serving diseased oysters instead of cake, with the exception of Bart (who fed his oysters to Martin's pet cat), Lisa (who feigned sick to get out of the boring party and is a vegetarian—even though many experts state that oysters are more plant than animal, and therefore, would be acceptable to eat for vegetarians and vegans), and Principal Skinner and Mrs. Krabappel (who hid away in Martin's kid-sized playhouse).