De Lesseps, claims that Simmons, 60, who is facing multiple sexual assault charges, inappropriately grabbed her derriere.
The 52-year-old told the Daily Beast website: "He grabbed my a** in an elevator, he was just a pig, I haven't told anybody about that before. I was grossed out.
"I was like 'How dare you.' He invaded me, he took advantage of me, being who he is, thinking he is all 'it,' all everything.
"He thought he could just do that. I looked at him and said, 'Don't ever do that again.'"
The reality star alleges the incident took place three summers ago at Soho Beach House in Miami.
In the interview the infamous housewife also revealed how she will soon relocate from her New York penthouse to her home in Sag Harbor as she prepares to film scenes for RHONY.
RadarOnline.com previously reported how she apologized for her Diana Ross Halloween nightclub costume.
A statement from Russell Simmons:
I am blessed to have shared extraordinary relationships, whether through work or love, with many great women and I have enormous respect for the women’s movement worldwide and their struggle for respect, dignity, equality and power. I am devastated by any reason I may have given to anyone to say or think of me in the ways that are currently being described.
I have separated myself from my businesses and charities in order to not become a distraction. I have re-dedicated myself to spiritual learning, healing and working on behalf of the communities to which I have devoted my life. I have accepted that I can and should get dirt on my sleeves if it means witnessing the birth of a new consciousness about women. What I cannot accept is responsibility for what I have not done. The current allegations range from the patently untrue to the frivolous and hurtful.
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.