Cannon has addressed the claims her ex was a closeted homosexual in her new book Dear Cary and, in a new U.S. TV interview, she insists Grant was all man in the bedroom.
"That part of our life was very fulfilling. There were no problems. There's rumours about everyone in Hollywood.
"I never saw any of that. It was not true. There was no foundation."
And she insists she never stopped loving Grant - even after the couple divorced in 1968: "He was a beautiful, wonderful, dear man."
Grant died after suffering a cerebral haemorrhage in 1986.