Most of our family members truly understand "I would rather not discuss that right now".
I guess our families are weird in the non-pushy way.
We just recently had a situation that was not ready to be discussed, and the slight brush-off, casual comment took care of the questions. The problem has become common knowledge now, so they know that in the long run all the questions have been answered.
We feel that way, too. We are now the older generation, very close, and are just preparing for the new 4th generation.