Kris Jenner's mother, Mary Jo Shannon (affectionately known as 'MJ'), has passed away at the age of 91.Her death has sent shockwaves through the Kardashian-Jenner family, with Jenner paying heartfelt tributes on social media.In a heartfelt post, Jenner described MJ as the heart of their family, emphasizing her role in teaching love, kindness, and resilience.The tribute highlighted MJ's influence on the family's dynamics, her unconditional love, and the values she instilled.MJ, born on July 26, 1934, married her high school sweetheart, Robert True Houghton, in 1954, and later married Harry Shannon.Her declining health, particularly after the death of her daughter Karen in 2024, was discussed in recent episodes of the family's reality show.Jenner expressed deep grief, noting MJ's lasting impact on her children and grandchildren.The cause of MJ's death has not been disclosed, but her legacy lives on through the family's traditions and the love she left behind.This news underscores the enduring influence of MJ's life and the profound loss felt by her family and fans.