The new grandmas don't seem to be big fans of each other

In classic KarJenner fashion, there is plenty of drama to expect in Rob Kardashian and Blac Chyna‘s special episode showing the birth of their newborn daughter Dream Renée.

The first clip of E!’s Rob & Chyna Baby Special shows the family preparing for childbirth, complete with a Lamaze class and even a conversation between Kardashian, 29, and Scott Disick about Chyna’s thoughts on a natural birth. At one point, Kardashian revealed that Chyna’s mom, Tokyo Toni, was coming to town.

“What was that whole thing that your mom said that she said bad things about her?” Disick asked, alluding to some issues between Kardashian’s mom Kris Jenner and Toni.

“Her mom’s just, like, a loose cannon,” Kardashian explained in the clip.

Then, the video jumps to a conversation between Chyna and Toni, with Chyna telling her mom, “Sometimes you intimidate people.”

“I go off when it’s deserved,” Toni said. “If you not acting accordingly, Imma handle you.”

RELATED VIDEO: She’s Here! Rob Kardashian and Blac Chyna Welcome a Daughter

And Jenner looked less than thrilled to be “handled” by Toni, as she said, “Oh God, here we go,” when Chyna started looking for her mom at the couple’s baby shower.

The hour-long Rob & Chyna Baby Special — which gives viewers an peek into the couple’s life leading up to baby Dream’s arrival — will air Dec. 18 at 8 p.m. ET on E!