A financially strapped California congressman accused of raiding $250,000 from his campaign account used some of the ill-gotten cash to pay for steamy affairs with DC lobbyists and one of his own staffers, according to bombshell new court filings.

Married Rep. Duncan Hunter (R-Calif.) repeatedly dipped into his campaign war chest while he slipped between the sheets with politicos, a congressional employee and a staffer between 2010 and 2016, the Department of Justice charged in a motion filed in California’s Southern District late Monday.

“Carrying out all these affairs did not come cheap — Hunter spent thousands of dollars treating women to meals, drinks, and vacations, and traveling to and from their homes,” the motion reads.

“Given the pronounced financial difficulties the Hunters were facing, his use of campaign funds to pursue these relationships was necessary for Hunter to satisfy his desire for intimacy.”

Hunter and his campaign-manager wife, Margaret, who were mired in personal debt, are accused of flippantly blowing through the dough to fund their lavish lifestyles without batting an eyelash at the ethical ramifications, prosecutors allege.

Hunter threw his wife under the bus following their August 2018 indictment, telling Fox News at the time, “She was also the campaign manager. So whatever she did, that will be looked at, too, I’m sure. But I didn’t do it. I didn’t spend any money illegally, and I did not use campaign money.”

Margaret struck a plea deal with the feds on June 13 and agreed to cooperate against her philandering husband.

In the newly filed motion, prosecutors laid out how Hunter funneled some of the stolen money to fund his infidelity.

Hunter ostensibly attended a nonprofit advocacy group’s 2010 convention in Reno, Nev. — but investigators say he barely spent a few hours there before leaving early to go hit the slopes at the Heavenly Mountain Resort in California with a lobbyist paramour whom the feds identified only as Individual 14.

“Hunter and I-14 spent the weekend skiing, ordering room service, and enjoying the amenities of the full-service resort. They checked out on Monday, January 25, 2010, when Hunter paid the $1,008 hotel tab using campaign funds from his campaign credit card,” court papers said. “He spent another $180 in campaign funds on airfare back to Washington.”

They also went on “double dates” — including one with another congressman — to Virginia Beach and Birchmere Music Hall.

In 2011, he even hooked up with the woman in a hotel room meant for his wife. Margaret booked a hotel room in DC from June 21 to 24, but her arrival was delayed by a day. Rather than change the reservation, Hunter kept it and met I-14 there for a tryst after a political dinner at the same hotel.

He shacked up with I-14 and a congressional aide, I-15, at the women’s DC-area pads — “staying there nearly every night” in one case — and spending campaign money on food, drinks and rides to and from their homes.

And Hunter, who lists “preserving family values” as a central issue on his congressional website, wasted no time bedding a staffer who started working in his office in 2015.

“Hunter and I-16 began a romantic relationship not long afterward,” the motion states, adding he once took her on a campaign-funded “triple date” to the DC putt-putt-and-ski-ball bar H Street Country Club.

The motion also describes apparent one-night stands with Washington lobbyists in October 2015 and September 2016 as “intimate personal activities unrelated to Hunter’s congressional campaign or duties as a member of Congress.”

Duncan has pleaded not guilty.