The aggressive response from Mr Biden's assistants is the last indication of what they said at the weekend: they would not be dissuaded by allegations of entering the presidential race.
The challenge for Mr Biden now that Ms Flores is no longer alone when she speaks.
In her quantum interview, Ms. Lappus said the meeting, which made her awkward, happened to a foundation in 2009 when she worked as a congressional assistant to representative Jim Heims of Connecticut.
"There is an absolute order of integrity," she told Courant. "There is a line of respect. Crossing this line is not a grandfather. It is not cultural. This is not affection. This is sexism or misogyny. "
Senate Senator Chris Murphy's office in Connecticut confirmed on Monday that the event described in the Quantum article had occurred and that Mr Murphy, who was a congressman at the time, attended him. The recent study of Biden's physical behavior began on Friday when Ms. Flores, a Democrat, published an essay in The Cut by New York, which describes a meeting with Mr. Biden in 2014, which she described as devastating. Essay, she writes that Mr. Biden has come to a rally to help his young campaign of Nevada's lieutenant governor and came behind her, touched her and put a "big slow kiss" on the back of her head. In a statement Friday, Biden said he did not believe he acted inappropriately, but he promised to hear every prosecutor.
After publishing the essay, 39-year-old Ms. Flores praised Biden for his readiness to listen. concern and clarification of his intentions. But she said it was hard to believe that Mr. Biden could not have known how he had made her and other women feel and called his conduct "totally inappropriate."