The Price of Fame (1996)

A personal assistant takes advantage of her boss, a buxom actress with a craving for self-bondage. One day, when the actress had gagged and handcuffed herself, the disgruntled employee tells the star that she was quitting and would sell her story to the tabloids and notify the papers where they could find a certain manacled and muzzled actress unless she agreed to pay the underpaid employee a hefty stipend. But the actress wouldn't agree to pay the blackmail, so the personal assistant grabbed the key and left the perky brunette to struggle against the chaffing handcuffs cuffs.