Federal prosecutors are opposing ex-cop Valerie Cincinelli’s release as she awaits sentencing on a charge stemming from a plot to assassinate her estranged husband and her boyfriend’s teen daughter.

Cincinelli, 36, copped to one count of obstruction earlier this month as part of a plea deal and faces up to 57 months in prison under sentencing guidelines. Long Island federal prosecutors agreed to drop the two murder-for-hire counts against her.

Citing the lessened charge and her two years of time served thus far, Cincinelli’s lawyer James Kousouros asked that she be released pending sentencing.

But prosecutors countered that Cincinelli’s violent conduct called for her to remain behind bars.

“Her conviction for a serious felony indisputably weights in favor of continued detention, not release,” wrote Assistant US Attorneys Catherine Mirabile and Anthony Bagnuola in the letter filed Friday.

Their filing noted that while she was no longer facing the most serious charges against her, the court was still able to consider the circumstances of those accusations in weighing her release. She was denied bail on four previous occasions.

The attorneys also stressed that Cincinelli shouldn’t be sprung before her targets had a chance to address the court.

Cincinelli was busted in May 2019 for allegedly paying her then-boyfriend John Dirubba $7,000 to hire a hitman to kill her estranged husband, Isaiah Carvalho Jr., during a bitter divorce and custody war over their son. Cincinelli also has a daughter from a prior marriage.

The ex-cop was accused of adding Dirubba’s 15-year-old daughter to her hit list. Cincinelli said the girl was taking up too much of her father’s time and money. “Run her the f–k over, how about that?” she allegedly suggested to her then-beau in a recorded conversation.