Julie, I think you're right, and that getting a release from both mother and wife would be a good idea, although then you'd have both of their artistic preferences to deal with.
However, an article at
http://www.publishingattorney.com/rightpriv.html notes:
"States have also reached different conclusions regarding whether the right of publicity survives the death of an individual. Generally, in those states that permit survivability it is only permitted for celebrities but even these states differ on how long the right of publicity survives for the deceased celebrity."
I had also heard before this that the right to privacy ends with death.
Back to the other issue, however, I was fascinated by this discussion because I have a lot of material from a recent trip to France, and just completed a painting of a woman whom I photographed as she sat outside with a friend at a Montmartre caf