Who knew the city’s actuary office was such a hotbed of sexual shenanigans.

A former secretary for the city agency that crunches numbers for pension plans says in a new lawsuit that her boss tried to get her in the sack — then had her fired when she complained.

Andreea Ioana Pantor, 34, of Queens, claims Assistant Deputy Chief Actuary John Gibney Jr. first approached her five months after she started her seemingly humdrum job in August 2012.

During that encounter, Gibney, 57, bragged about a recent trip he’d taken to Key West, where he and his wife “patronized an establishment where the patrons were completely naked,” the suit claims.

The $162,000-a-year deputy “instructed Pantor to search online using terms in order to generate similar images.”

“She felt intimidated, and reluctantly complied, and this search resulted in Pantor seeing images of scantily clad women, which created a … hostile and offensive work environment,” her Manhattan Supreme Court suit says.

The suit does not name the venue and Pantor and her attorney, Laura Trachtman, declined to comment.

Shortly after the nudity search, Gibney allegedly gabbed about a local gym’s “butt lift” fitness routine and demonstrated the move in front of her desk by “thrusting his pelvis backward repeatedly and gyrating his derriere,” according to court papers.

Pantor, who graduated from Cornell University and the University of Pennsylvania, let the two incidents pass without telling anyone.

But in January 2013, Gibney allegedly made his intentions clear, telling his much younger co-worker that his wife allowed him to have affairs, and asked if Pantor was married, the suit states.

The attractive brunette is single but she felt uncomfortable about the come-on and reported Gibney to the chief actuary in March 2013.

In June 2014, city officials substantiated Pantor’s claims, according to court papers, but they merely slapped Gibney on the wrist by requiring him to attend a sexual harassment awareness seminar — then promoted him.

A week later, Pantor learned her position had been eliminated. She’s still unemployed and suing the city for $1.5 million.

The alleged sexual harassment has caused Pantor “extreme mental anguish, outrage, severe anxiety about her future, painful embarrassment among her friends and co-workers, disruption of her personal life and loss of enjoyment of the ordinary pleasures of everyday life,” the suit says.

Gibney did not return messages left on his work and cellphones.

A spokesman for the city’s Law Department said, “We’ll review the allegations and respond accordingly.”