TheMarried to Medicinecast has never been shy about revealing some of the uglier truths in their relationships on-camera. But none are as shocking as whatQuad Webb-Luncefordreveals in the season 6 reunion.

PEOPLE has the exclusive premiere of the trailer for the Bravo show’s three-part season 6 reunion — which features Quad and her estranged husband, Dr. Gregory Lunceford, coming face-to-face for the first time after six months of not speaking.

In the tearful chat, Quad claims that Dr. Greg physically abused her, telling him, “You slammed me to the ground.”

Dr. Greg has allegations of his own, claiming that Quad “pulled a knife” on him.

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Married to Medicine – Season 6

Quad and Dr. Gregory — who married in 2012 — are embroiled in a nasty divorce, much of which has played out during the past two seasons.

Last year, Quad said shehad hit “a crossroads” in their marriagebecause Dr. Gregory was unable to support her emotionally. In theMarried to Medicineseason 5 finale, she asked her psychiatrist husband if he wanted to get a divorce during one of their dual confessional interviews, causing him to storm out.

Things got worse in the season 5 reunion, when it was revealed that Dr. Gregory and a male friend had gone into a hotel room with two other women. Although he said that nothing ever happened, the incident left Quad feeling betrayed.

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“Married To Medicine” Season 2 Premiere

By the time season 6 premiered in September, Quad revealed to Bravo’sThe Daily Dishthat she had filed for divorce and that they were living in separate residences.

“I was trying to be everything,” she said during an appearance ofWatch What Happens Live with Andy Cohenthat month. “Eventually that wore on me, and in a sense, it made me resent him a bit.”

Other than the occasional text message and trading barbs in the press, the two haven’t been speaking at all.

Dr. Gregory also has yet to sign the paperwork for their divorce, something that’s frustrated Quad even more.

“He’s been non-compliant in turning in the paperwork in which we need to complete the divorce,” she said onWWHLin September. “If you want to live single, then you do the work to be single.“

Married to Medicine – Season 6

Meanwhile, elsewhere in theMarried to Medicinereunion, the women look back on the season’s ups and downs, including Bush-Harris’ tension with Metcalfe. The husbands get time to sit with Cohen without their wives around, too.

When they join them again, the fallout from Quad and Dr. Greg’s confrontation begins as Quad apologizes to her cast mates for keeping them in the dark about her relationship troubles. “I’m sorry I made you all feel shut out,” she says. “I’m sorry, y’all.”

Divisions are drawn in the group, with Huq apparently not open to hearing Quad’s words. “You are the scum of the earth,” she tells her former friend.

“Why are you even here?” Huq adds to the soon-to-be divorced Quad. “You ain’t even married to medicine, my love.”

Married to Medicineairs Friday (9 p.m. ET) on Bravo. Part one of the reunion kicks off on Dec. 21, with part two airing Sunday, Jan. 6 and part three airing Sunday, Jan 13.

source: people.com