(CNN) A former Capitol Hill staffer said Rep. Duncan Hunter grabbed her behind at a party in downtown Washington in 2014, adding a new element of impropriety alleged against the embattled California Republican, who is charged with using campaign funds to pay for vacations and to finance extramarital affairs.

Rory Riley-Topping, a former subcommittee staff director on the House Veterans' Affairs Committee, told CNN in an interview that she was at a bar after an annual dinner held by the National Republican Congressional Committee when Hunter approached her, appearing, she said, to be intoxicated.

"Duncan Hunter had told me that he wanted to talk to me about Agent Orange, which is an issue the committee was dealing with at the time. I politely said, 'Great. I'll get in touch with your staff.' And he kind of leaned in and said, 'No, I want to talk to you about it,' and had reached over and pulled himself in very close with his hand on my behind," Riley-Topping said.

"I felt very uncomfortable," Riley-Topping said. "I very awkwardly moved away."

Riley-Topping said she then approached Republican Rep. Jon Runyan of New Jersey, a member of the committee she worked on who has since retired, and told him what had happened. "This is gross. This is what happened: Duncan Hunter just grabbed my ass. I don't want to be here anymore," she recalled in the interview.

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