Shar Jackson Cries Uncontrollably at Daughter's Fake Grave

Living out her biggest fear. The ladies get emotional in The Mother/Daughter Experiment: Celebrity Edition‘s Tuesday, March 8, episode when visiting mock-up headstones for their loved ones, as seen in Us Weekly‘s exclusive sneak peek.

In the Lifetime series’ clip, Shar Jackson falls apart when she sees a grave marker with daughter Cassie‘s name on it.

“This exercise is absolutely my worst nightmare ever,” the mother of four, 39, tells the camera.

As the show’s counselor encourages Jackson to share what would be her final goodbye, the Celebrity Fit Club: Boot Camp alum starts bawling and exclaims, “Oh, s–t!”

Previously, in the show’s Tuesday, March 1, premiere episode, Cassie, 20, accused her mom of being “too clingy.” The show’s other participants include Kim Richards and daughter Kimberly Jackson, Courtney Stodden and mom Krista Keller, and Heidi Montag and mom Darlene Egelhoff.