It depends heavily on your jurisdiction, so this is not something strangers online can answer with certainty.

In general, the photographer usually owns the copyright to photos they took, even if the shoot was a gift. That means she may have the right to display her work unless a contract says otherwise. In the U.S. and similar common-law jurisdictions, privacy/publication rights are often weaker than people expect, though using images to advertise a business can raise separate permission/model-release issues. Some answers noted that portfolio use may be treated differently from broader commercial promotion.

In some European countries, identifiable people may have stronger rights against publication without consent, even when the photographer owns the copyright.

So: morally, many photographers would honor your request, but legally it may come down to local law and how the images are being used. If you want a definitive answer, consult a lawyer in your area. For future shoots, always have a written agreement covering copyright, delivery, privacy, and online/portfolio use—even if no money changes hands.