The reason I mentioned the NGM morphs was because they can add shape, I didn't mean giving her 40DD's!
Yes, the primary use of the NGM's was to give the breasts a more realistic look, especially when some size was added.
However, not all the NGM's sag the breasts.
The Petite ones for V4 are really good, especially when you want a smaller breast size.
GND4 has a good, well shaped small chest. If you were using the ordinary V4 then I feel these morphs could give you that extra bit of realism.
I should have mentioned the NGM Petite earlier as these are the ones I had in mind.