It won’t be the happiest Mother's Day for "The Simpsons" creator Matt Groening. Homer and Marge Simpson can spar forever in animation, but according to a paid obituary in the Oregonian, Groening’s mother, Margaret "Marge" Groening, has passed away in Portland at age 94.

Her husband -- cartoonist and presumed lover of donuts, Homer Groening, of course -- passed away in 1996. Groening has said that the critically renowned and culturally worshipped show was based on his own family and that he created the show to provide an alternative to the "mainstream trash." His plan worked. Audiences have adored watching Homer and Marge tangle with their children Bart, Lisa, and Maggie for 24 seasons and counting. Yes, Groening has two sisters: Lisa and Maggie.

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There aren't many pictures of Margaret Groening available out there, but the photograph accompanying her obituary shows a beautiful woman with a bright smile and brown (not blue) hair. Born Margaret Wiggum (another "Simpsons" reference!), the high school English teacher's accomplishments include being named high school valedictorian as well as May Queen of Linfield College. She married Homer, her high school classmate, "because he made her laugh the most."

Portland native Lawrence Jackson's signature on the guest book noted Margaret's importance to "Simpsons" fans: "You gave the world much joy through your son Matt. You were, in a way, a Mom to us all."