I am in the "need to know" camp when it comes to relatives and testing/info on my kiddo's academic progress and issues. That includes my parents and siblings. I have shared a couple of writups with my parents over the years about younger D with my parents, but most of the time I have not mentioned what is going on. In fact, my parents were making me so crazy about my D's college search this year that I finally put a moratorium on discussing it with them. Told 'em we would let them know on May 1 (the day she needs to commit) what she has decided. They have stopped asking, although they do try to pump info out of my older daughter or get my siblings to do it. But we are wise to these tactics.
