A member of an Upstate New York “cult” has admitted to keeping her own personal slave locked in a room for two years, according to new reports.

The New York Post reports newly unsealed court documents revealed Lauren Salzman secretly pleaded guilty last week to charges of racketeering conspiracy for her involvement with the Colonie, N.Y.-based NXIVM.

“I knowingly and intentionally harbored Jane Doe 4, a woman whose identity is known to me, in a room in the home in the Northern District of New York,” Lauren Salzman told Brooklyn federal court Judge Nicholas Garaufis last week.

Salzman, 42, said she held the unidentified woman hostage from March 2010 to April 2012 and threatened to deport her to Mexico if she didn’t perform tasks as ordered.

Salzman also admitted to being a member of a women’s only group within NXIVM called “DOS,” a “secret sorority” that allegedly brainwashes members, puts them on starvation diets and beats them if they don’t recruit enough “slaves.” DOS stands for “dominus obsequious sororium,” Latin for “master over the slave women.”

NXIVM claimed to be a self-help group, with DOS focusing on women’s empowerment, but federal authorities say DOS instead groomed female members to have sex with NXIVM founder Keith Raniere.

Salzman was arrested in the Capital Region last year for her involvement with the group, along with her mother, NXIVM president Nancy Salzman; “Smallville” actress Allison Mack; NXIVM bookkeeper Kathy Russell; wealthy Seagram’s liquor heiress Clare Bronfman; and Raniere.

The Post reports Lauren Salzman’s guilty plea was partly redacted, suggesting she may be cooperating against the other defendants in the trial to receive a reduced sentence. Her mother, Nancy, also pleaded guilty last month.

Raniere, Mack, and the others are facing charges for their involvement in NXIVM, a Colonie, N.Y.-based group accused of branding women and requiring them to have sex with Raniere. Members are also allegedly required to give their “master” or recruiter, naked photos of themselves and other blackmail material before joining.

Charges include sex trafficking, wire fraud, extortion, identity theft, money laundering, and forced labor conspiracy. A criminal trial is scheduled to begin April 29 in Brooklyn.

NXIVM described itself as a self-help organization, but former member Sarah Edmondson filed a complaint in 2017, saying she was branded with Raniere’s initials, “KR.” The Justice Department began a federal investigation of NXIVM later that year.

Mack, who played Chloe Sullivan on The CW’s Superman TV series “Smallville," was believed to be Raniere’s top recruiter and introduced corporeal punishment for the “slaves.” Other members reportedly included former “Dynasty” star Catherine Oxenberg’s daughter India Oxenberg and “Street Fighter: The Legend of Chun-Li” star Kristin Kreuk.

NXIVM claimed to have over 16,000 members in chapters nationwide, as well as in Canada and Mexico. Until the Salzmans’ guilty pleas, officials and associates had repeatedly denied all wrongdoing and disputed allegations that it is a cult.