After announcing her shocking decision to undergo a sex change, Chastity aka Chaz Bono almost immediately started receiving offers for a reality TV show to document the process.

Her mother Cher offered her some blunt advice: "Just say no!"

Although the music legend "is 1,000 percent onboard" with her daughter’s plan to transform herself into a man, a family friend says Cher is adamant about not wanting to get dragged into the insipid  world of reality TV.

Now known as "Chaz," the 40-year-old daughter of Cher and Sonny Bono recently announced she was undergoing the gender reassignment. She wants to do it before marrying longtime partner Jennifer Elia.

"Talk about must-see TV!" declared the friend. "Chaz has been fielding offers from reality show producers who want to show her sex change on camera.

"After appearing on Celebrity Fit Club a few years ago, Chaz learned the ropes of reality TV.

"But Cher was shocked that Chaz even considered documenting her life – let alone her sex change on camera. Cher treasures her privacy."

As the ENQUIRER exclusively reported, 5-foot-5 Chaz – who weighs about 245 pounds – is also planning gastric lap-band surgery to drop 75 pounds before the sex change and wedding.

"As a gay activist, Chaz is adamant about recording her sexual identity struggles and her transition from female to male," said her friend.

"Her concern is that it be done tastefully. If she does it at all, she wants a documentary style format, and for it to be educational."