Washington (CNN) Embattled Rep. Duncan Hunter used campaign funds to pay for extramarital affairs with lobbyists and congressional staffers, prosecutors in California alleged in a court filing Monday.

The salacious revelation joins a host of other charges levied against the California Republican, who pleaded not guilty last year on counts of wire fraud, falsifying records and campaign finance violations.

Hunter's wife, Margaret, who also faced federal charges, pleaded guilty earlier this month and agreed to cooperate with prosecutors. Rep. Hunter has denied the previous allegations against him.

The filing, submitted as part of a series of motions by California prosecutors on evidence they hope to use in a trial scheduled to begin in September, provides detailed accounts of five different affairs, including one with a woman who worked in Hunter's congressional office.

According to the filing, Hunter and the unnamed staffer "occasionally spent nights together at his office" and went on dates funded by campaign cash. One night in 2015, at a Washington, DC, bar known for indoor mini golf, Hunter spent $202 in campaign funds for drinks and snacks, the filing says.

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