Jeffrey Epstein forced one of his alleged sex slaves into marrying another woman — by promising to foot a $20,000 bill for the victim’s much-needed medical surgery, according to a new lawsuit.

The victim, only identified as Katlyn Doe, was just 17 when she first met Epstein in 2007 and spent the next seven years traveling to his homes in Manhattan, Florida and the US Virgin Islands for the sole purpose of having sex with him, the complaint filed in Manhattan federal court said.

The young woman was one of three Epstein accusers to file suit against the late pedophile’s estate and others on Tuesday — a day after his will was filed in St. Thomas.

Soon after they’d met, Epstein, 66, promised he’d cure Katlyn’s eating disorder, as well as take care of her medical bills for an undisclosed “serious medical condition,” court papers said.

In 2013, he allegedly coerced her into legally marrying one of his female recruiters, “Associate 3,” so that the recruiter could obtain legal status to “remain in the country to work for him,” the suit said.

In exchange, he told Katlyn he’d pay $20,000 for her to get surgery — but he only half-fulfilled that promise, the victim claimed.

She said the marriage was made to appear real on paper — it was arranged by Epstein’s “long-time New York attorney” while another employee prepared the paperwork. The nuptials included “posing for photographs to give the appearance that the marriage was legitimate.”

Epstein forked over $10,000 once Katlyn had tied the knot and promised the remaining cash when the marriage ended. The sham lesbian couple lived at one of his apartment at 301 E. 71st St.

“Jeffrey Epstein continued to use the still-owed $10,000 as a cudgel to cause plaintiff to continue to engage in commercial sex acts, knowing that if she did not do so he would never pay the shortfall,” the suit said.

But in 2014, Katlyn said, she was deemed “too old” for Epstein at age 25. He stopped having sex with her and booted her from the apartment — and also refused to pay the remaining $10,000 when she and “Associate 3” divorced in 2017.

“Plaintiff was never paid the additional ten thousand dollars Jeffrey Epstein had promised to pay her for the marriage favor, nor was she ever able to receive the surgery that she continues to need today,” the suit said.

Katlyn also claimed that her sexual relations with Epstein continued while he was on “work release” as part of the controversial plea deal he brokered with Florida prosecutors in 2008.

The convicted pedophile allegedly had her flown from New York to the Sunshine State under the guise of getting her a job at the Florida Science Foundation, where he was working at the time.

But instead, Katlyn said, she was forced into having sex with Epstein, as well as “another young female.”

Lawyers for Epstein’s estate didn’t immediately return messages.