The Southern Charm star sat down for the season four reunion, and was forced to reveal to her costars what sent her to a month-long program in California last summer.
“My sobriety is for marijuana!” the 24-year-old yelled at Jennifer Snowden in a preview clip.
“You went to rehab for marijuana?” Andy Cohen asked.
“So pathetic,” Landon Clements added.
RadarOnline.com previously reported that she checked into rehab after the season three reunion.
PHOTOS: Staged Scenes, Big Lies & More! ‘Southern Charm’s Blatant Fakery Exposed
Dennis later accused Ravenel of using mushrooms and cocaine in front of their kids, but she was forced to surrender custody to him in their settlement anyway.
- Fired 'Southern Charm' Star Kathryn Dennis' Ex Thomas Ravenel Granted Permanent Sole Custody of Their Two Kids
- ‘Southern Charm’ Star Kathryn Dennis Settles Eviction Lawsuit As She Moves Out Of South Carolina Rental
- Former 'Southern Charm' Star Kathryn Dennis Moving After Being Hit With Eviction Papers
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