Michelle doesn't like to have her picture taken. I can respect that. However, she lets me and I appreciate that.
When somebody who doesn't like having their picture taken allows me to do it, I feel as though I have a special obligation to get it right. I also tend to show them the image in camera so that they can see what they will look like. If you find yourself in a similar situation, take the time to let them know that you appreciate them allowing you to shoot and that you very much appreciate their patience.