Mrs. Mayberry/History

Past
Mrs. Mayberry married to Jarold Mayberry and had a job at an elementary school.

One day whilst teaching her class and her students sing about learning until one of them reminds her it's her husband's birthday. Mrs. Mayberry panics, as she forgot and hadn't gotten him a present, but at the suggestion of one of her students calls her husband as a happy birthday surprise. Using the classroom computer to video call her husband, she and the class are shocked after seeing Jarold in bed having sex with another woman. Mrs. Mayberry snaps and storms out of the classroom, throwing a student who tries to calm her down into the ceiling on her way out. After driving home, her students watch the video call in horror as Mrs. Mayberry violently kills her husband and attacks the woman with a gun and chainsaw before she takes her own life upon realizing what she had done in front of her students, and she soon arrives at Hell.

"Murder Family"
In Blitzo's office, Mrs. Mayberry recounts the day she went to Hell to explain why she wants to hire I.M.P. Blitzo mocks her, thinking everyone in her story is dead, but Mrs. Mayberry explains while she successfully killed her unfaithful husband, the woman he had been in bed with, Martha, not only survived but is also treated as a hero because of it.

Mrs. Mayberry steps out of Blitzo's office as he accepted the job and witnesses Moxxie set fire to the I.M.P building. Afterwards, Blitzo promises to kill Martha in 24 hours or the kill is free and she leaves in a taxi.

Later, Mrs. Mayberry attended a party to congratulate Moxxie for killing Martha, celebrating the job with some cake, saying "That's messed up, but I paid for it!".