Having a hard time explaining to your child why mommy's body issues are going to result in mommy wearing bandages over her tummy, boobs and nose? Well never fear, there's a book for you: My Beautiful Mommy.
It uses metaphors like caterpillars and coccoons to make the idea of plastic surgerycomforting. It also explains that mommy couldn't fit into her old clothing any more, because she got old...therefore she needs to make herself look prettier.
See?

If your mother has had the problem of looking like a real person with a bumpy nose, NO PROBLEM!! We can turn mommy into an older version of Kim Possible! Daddy will like her MUCH better now, and stop working weekends with that tramp of a secretary!

Seriously, I can see why children might be frightened and confused by a parent going into plastic surgery, but this book is massively self-serving, and the idea that "Mommy needed to be prettier" is just perfect for raising up a new generation of kids who think that everything will be perfect if they just have a straight nose or larger breasts. Which, come to think of it, will be perfect for drumming up more business for the doctor.
Come to think of it, children are having cosmetic surgery at a younger and younger age, aren't they? Just what sort of business IS this doctor trying to drum up?