Well, that escalated quickly. Farrah Abraham and on-again, off-again boyfriend Simon Saran slam Amber Portwood and her fiancé, Matt Baier, in a preview for part two of the Teen Mom OG season 6 finale special. The heated moment was the catalyst for the young mothers’ previously reported onstage fight.

In the clip above, Saran acknowledges insensitive Snapchat videos he posted earlier this year, in which he took a dig at 46-year-old Baier and 26-year-old Portwood’s 20-year age difference.

"These people make themselves vulnerable — they give you ammo to just talk about them," Saran explains to host Dr. Drew Pinsky, while adding that he means "no disrespect" and that it "was all in fun."

Abraham, 25, then defends Saran while simultaneously dissing Portwood and her other TMOG costars, Maci Bookout and Catelynn Lowell. "He's not being an Amber or being a Maci or being a Catelynn and saying you're going to beat somebody's ass, you're going to create fights," the My Teenage Dream Ended author says. "Simon's not even doing that."

However, Pinsky brings up the fact that Saran once called Baier a “pedophile.” As Saran appears as though he’s about to apologize, Abraham retorts, “Well, I’m sorry that Matt probably looks like it.”

In a previously released promo for part two of the show, Abraham’s comment infuriates Portwood, who rushes on set to confront the mom of Sophia, 7.

As viewers witnessed on the Monday, November 28, special that aired after the season finale of TMOG, Portwood went off on Abraham when Dr. Drew questioned about the status of their friendship.

“We used to be [friends] and then she decided to open up her crooked lips. She decided to do an interview saying something about how it's good that [my daughter] Leah is with Gary [Shirley] and how my house probably smells like piss. You don't do that," Portwood fumed to Pinsky about the budding entrepreneur, with whom she used to be friends and whom she has previously defended. "She's been mean to Catelynn, Maci, my fiancé, Taylor [McKinney], everybody on this show and her piece-of-s--t boy toy Simon.”

Watch the video above. Part two of the Teen Mom OG finale special airs on MTV Monday, December 5, at 9 p.m. ET.

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