Kris Jenner’s mother Mary Jo’s cause of death has been revealed. The family matriarch passed away on July 16, aged 91, with her death certificate listing acute cardiopulmonary arrest as the immediate cause of her death. Kris announced her mother’s death in a post on Instagram on July 16, as she wrote: “Today, we said goodbye to my beautiful Mommy MJ. Kris’ daughter Kim Kardashian also remembered her grandmother on her birthday, again sharing a slew of snaps and writing: “Happy Heavenly 92nd Birthday grandma! She concluded: “I miss you like crazy and I love you endlessly my sweet grandma MJ.”