Former Mayor Mike Bloomberg’s Hamptons estate is more like the Playboy Mansion than Gracie Mansion, according to a lawsuit that claims workers are doing the nasty all over the $20 million home.

At the center of the secretive shenanigans at Ballyshear were managers Marika Sygman and Steve Kaczynski, who liked to get busy in rooms throughout the 22,000-square-foot Georgian landmark, claims former housekeeper Nelly Amaya.

Just two weeks into her gig at the Bloombergs’ 11-bedroom, eight-bath Southampton home, Amaya says two co-workers warned her “to be cautious when entering rooms in the mansion because she could easily witness Sygman and Kaczynski engaging in sexual behavior,” according to papers filed in Brooklyn federal court.

The maid claims she once overheard the lovers planning “to have sex in the billiard room in the basement, next to the laundry room.”

When the couple realized she had heard them, Sygman blurted, “No questions, Nelly!”

“She was really upset,” recalled Amaya, a married mother of three.

When Amaya raised concerns about the sexually charged environment, Sygman allegedly warned staffers, “If anyone goes to HR, see how far you fly when Mr. B kicks your ass out the door.”

But Bloomberg, who showed up only three times in the five months Amaya worked for him, was a good boss and “really respectful,” Amaya said.

“I’m pretty sure he doesn’t know what’s happening there,” the Ecuadorian immigrant told The Post. “He needs to know he trusts some really bad people.”

Amaya, who made $70,000 a year as executive housekeeper, says she was further “tormented” by two fellow housekeepers who regaled her with vulgar tales from the sack.

The couple “revealed explicit and offensive details about their masturbation habits and sexual experiences,” which included orgies and bedding an “underage male,” the lawsuit claims.

Amaya claims the sex talk caused her physical injury when, in fleeing from one conversation, she “blacked out” and slipped down a staircase. She suffered a concussion, bruises and back injuries, she said.

She claims she stopped working because of the medical issues, her pay was cut off after eight weeks and she was eventually fired.

“Nelly went to work to feed her family and not to be treated like a second-class citizen,” said her lawyer, John C. Luke Jr. “We will get to the truth.”

When she tried to convince Ballyshear human resources that her injuries were related to discrimination — which included anti-Hispanic comments by co-workers — Amaya claims Bloomberg exec Diane Gubelli forced her to delete the conversations she had recorded among her co-workers.

Amaya is suing Ballyshear LLC, Sygman, Kaczynski and Gubelli for unspecified damages.

Sygman called the allegations “simply not true.” A Ballyshear lawyer didn’t return a message seeking comment. Kaczynski couldn’t be reached.