"Well, we're not having actual sex," the 26-year-old actress, who plays Anastasia Steele in the film franchise, said of pretending to get hot and heavy with co-star Jamie Dornan.
"But I've been simulating sex for seven hours straight right now, and I'm over it," she added.
Dakota said her father, Don Johnson, will never catch the screening of "Fifty Shades Darker" when it hits theaters on February 10, 2017.
Johnson's famous mother, Melanie Griffith, has also abstained from watching her daughter in the R-rated role.