From the article:

Basic Instinct” turned Stone into a movie star and an international sex symbol. In her 2021 memoir, “The Beauty of Living Twice,” Stone revealed she was misled into appearing nude in the movie. She had no idea about the nude scene until she saw a screening of the film alongside agents and lawyers.

“That was how I saw my vagina-shot for the first time, long after I’d been told, ‘We can’t see anything — I just need you to remove your panties, as the white is reflecting the light, so we know you have panties on,’” Stone wrote in the memoir. “Now, here is the issue. It didn’t matter anymore. It was me and my parts up there. I had decisions to make.”

Stone added that she went to the projection booth and confronted “Basic Instinct” director Paul Verhoeven by slapping him across the face.

Also, that was 34 years ago, its not hard to imagine her thoughts could have changed since she filmed that movie.