Just to point out, yes that is a photograph ADP. A blurry grainy one. Here's a not blurry photograph of a womans lips...

In all seriousness though, it's a problem with Antonia's lip topology. Not really a problem, just how it was modeled. The lips are modeled with a very tight edge around the lips at default. So any map is going to look like it has a hard edge. I explain this earlier in the thread, you probably didn't read that though.

Here's the edge loops around Antonia's mouth. See how tight they are?

This causes a hard edge. In Poser smoothing an edge loop close to another will cause polygons to render with a hard edge. Further apart, a softer edge..

Here's the lip map that I made, see how blurry the edge is?

Here's the same map in the image you said looked too tight, but this time with a smooth morph applied to soften the edge. Better? It's not the map. It's the model. ;)