"I am nowhere near as breezy and uncomplicated as Mrs. Partridge," Jones wrote in the book.
In one anecdote, Jones said she and Cassidy went to Joan Collins' house for dinner in the late 1960s, where Collins' then-husband Tony Newley suggested they take off their clothes and watch porn together. "It was clear what Tony was leading up to -- swinging," Jones wrote, though she said she refused.
The "Dynasty" star, now 80, is reportedly furious at the allegations that she was a swinger, and has sent Jones a cease-and-desist letter. Jones is standing by her story.