In a sneak peek at tonight’s episode of Mama June: From Not to Hot, Sugar Bear unleashes a fit of rage at Mama June’s daughter Lauryn (aka Pumpkin) that changes the entire tone of the reunion special.

The clip starts out with Pumpkin, 17, cursing at her former stepfather backstage. “Okay, I swear to f–king god,” she exclaims before Sugar Bear charges at her, saying, “Come on over here you little s–t.”

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June, still seated on the couch in front of the cameras, yells “No!” as she hears the commotion. Pumpkin is being held back as a producer tries to calm down Sugar Bear. “You f–king touch her I swear to god I will f–king kill you,” June warns her ex.

Sugar Bear then gets so angry, he rips open his shirt, which causes the camera crew to yell “Stop!”

“I swear to god I will beat your f–king ass,” Pumpkin says as Sugar Bear walks away, kicking a piece of equipment before he leaves the room. The last shot shows Pumpkin crying.

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June exclusively revealed to Life & Style that she had suffered abuse at the hands of her 45-year-old ex. “There was just so much emotional and physical abuse,” she shared. “I just choose not to put my kids through that.”

She warned that Sugar Bear’s true colors would be revealed on this reunion special. “Watch out. You saw a little bit on Marriage Boot Camp, but this shows the real true side of Sugar Bear, and when the special comes out y’all are going to be like, ‘What the hell?!'”

Sugar Bear has since denied abuse claims, telling Entertainment Tonight, “It is not true, any of it.”

Tune in to Mama June: From Not to Hot tonight at 9 p.m. ET on WEtv, and scroll through the gallery below for a look back at Sugar Bear’s wedding to new wife Jennifer Lamb.