Then, she told the jury, Weinstein leaned toward her and added menacingly: "This remains between you and I".
"Victims are "hoping that this is just an aberration", she said, and they tell themselves: "'I can put it in a box and forget about it.
Ziv said most victims of rapes and sexual assaults know their attackers, do not fight back during the attacks, and maintain contact with their attackers.
'I said, 'No, no, ' but there was not much I could do at that point, ' Sciorra recalled for the court on Thursday.
In a two-hour-long testimony, Sciorra also talked about confronting Weinstein about the assault weeks later, and telling him that she had blacked out.
"I thought he was going to hit me right there", Miss Sciorra testified.
The ordeal changed her personality and her social habits and Sciorra explained she began drinking and self-harming. Perez said she tried to call Sciorra multiple times that night but Sciorra never picked up the phone. Hast said Weinstein became "more demanding and violent" during their encounters, leading to a March 18, 2013, incident where "the defendant decided he wanted more and forcibly took it". She was stunned, she told jurors, and suffered the misconception that rape was an attack by a stranger, something that happened in a dark alley.
"At the time, I didn't understand that that was rape", Sciorra said.
"It was so odd because she whispered it", Perez said, before whispering into the microphone in demonstration.
According to the actress, she first met Weinstein in LA in 1990, but was not assaulted by him until an encounter in NY some years later.
Investigator Sam Anson told the NY court that he received the email from Mr Weinstein on 17 August, 2017 but did not carry out his instructions.
Earlier on Thursday, forensic psychiatrist Barbara Ziv testified as an expert for prosecutors about why some sexual assault victims do not report attacks or avoid their abusers.
He questioned the validity of Sciorra's account, saying she once told a friend that she "did a insane thing and had sex with Harvey Weinstein" and that she had a consensual encounter with him.
Her allegations date back too far to be prosecuted on their own, but her testimony during a trial that's expected to be a watershed moment for the #MeToo movement could be a factor as prosecutors look to show that Weinstein has engaged in a pattern of predatory behavior. His response was "menacing", she said.
Weinstein is charged with five counts of rape and assault against two women in New York City.
Weinstein has consistently claimed all sexual relationships he has had have been consensual.
The alleged attack happened in the early 1990s and Sciorra told the court: "I was punching him".
Recounting an accusation she said she kept largely secret for decades, Sciorra testified that after raping her, Weinstein went on to try to perform oral sex on her, saying, "This is for you", as her body "shut down". In 1997, she was at the Cannes Film Festival to promote the film Cop Land.
Sciorra wouldn't say, replying only, "I woke up on the floor and my nighty was up", Perez said.
On Wednesday, Weinstein's lawyer said during opening statements that Sciorra had in the past described the encounter as consensual.