This was one of the downfalls that I saw in regards to the D800.
With that high of a megapixel count, you WILL get astonishing details.
HOWEVER, women will most likely end up not liking/hating the photo. The level of detail is so high that when inspected closely, you can see every single hair, every single wrinkle, every single blemish, any tiny makeup blemishes--all will be visible. Every single "flaw" will be apparent.
So each photo you take of them will have to be heavily processed. The processing is going to take up a LOT of your time. Plus, if you're not careful or an expert, the photos will look over-processed. By this, I mean when people touch up the skin it ends up looking too blemish-free and thus fake.