So, yes, just about every portrait session we do, especially if they're buying wall portraits, gets retouching and artwork--often slimming.
However, that being said, we are appalled at and will NEVER use software like Portrait Professional on our clients! Altering people's bone structure, nose shape, and flattening faces with the skin smoothing that these programs do is NOT professional.
Sorry about the RANT…..
So, yes we do customized artwork, manually, in Photoshop on most of our ladies--there's ALWAYS something they don't like about themselves--and they're ALWAYS thrilled with how we make them look. And, because they are thrilled they refer us to their lady friends for their family portraits!