But once in the auto, she wrote, Simmons told the driver to ignore Lumet's directions to her home, and instead took her to his apartment where he groped and had intercourse with her.
Simmons, 60, denied those allegations, saying everything that occurred between himself and Khalighi was completely consensual and with her "full participation".
To end the statement, Simmons said he will "step aside and commit myself to continuing my personal growth, spiritual learning and above all to listening".
Simmons acknowledged that he has known Lumet and her family and has "seen her several times over the years since the evening she described". But he said that her "feelings of fear and intimidation are real". "While I have never been violent, I have been thoughtless and insensitive in some of my relationships over many decades and I sincerely and humbly apologize".
In a recent response to allegations against him, published by The Hollywood Reporter, Simmons sounded as incoherent and delusional as other parties who have responded to sexual misconduct allegations by attempting to distract from the seriousness of the charges, including Harvey Weinstein and Kevin Spacey.
Lumet described feeling "dread and disorientation" after accepting a ride home in Simmons's auto, only for his driver to take her to the music mogul's apartment, despite her objections. "I remember thinking that I must be insane; I remember hoping that the Russell I knew would return any moment", Lumet wrote.
A spokeswoman for his ex-wife Kimora Lee Simmons, who previously designed the Baby Phat collection and once served as president and creative director of Phat Fashions, declined comment Thursday.
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On November 19, model Keri Claussen Khalighi accused Simmons of sexual harassment in a Los Angeles Times story. Lumet was frightened and feared that if she didn't comply, the situation might turn violent. Simmons, founder of hip-hop music label Def Jam Recordings and CEO of Rush Communications, said he has a "different recollection" of their encounter.
"Much of the time we were in the presence of other acquaintances", Simmons said.
This is the third allegation of sexual assault or impropriety against Simmons. Ratner, through his attorney, has denied the allegations.
One day ahead of the series' launch, a claim was leveled against Simmons from award-winning writer Jenny Lumet. "She claimed in 1991 Simmons and his friend, director Brett Ratner, took her to dinner and then back to Simmons" apartment where he "began making aggressive sexual advances, yanking off her clothes".
Khalighi, who was half Simmons' age at the time of the assault, said he did not have intercourse with her, but "coerced her to have oral sex". She claimed that "there was penetration" and she tried to "stay as contained as I could".
Lumet, who penned the films "Rachel Getting Married" and "The Mummy", said Simmons was an acquittance since 1987 after having met him through fellow Def Jam co-founder Rick Rubin. "The voices of the voiceless, those who have been hurt or shamed, deserve and need to be heard". "I rebuffed. It wasn't deep, as far as I knew".