Add me to the "Best not to do it" group. There are plenty of opportunities for women to take control of their bodies and post (and be compensated for) their nudes in a safe environment. She could be telling you this as a friend out of a place of honesty, and asking might damage that friendship. If she's angling to have you buy them, it is not healthy to sell nudes to people who you are supposed to be having a professional relationship with, and it may indicate she has latent self esteem issues.