I am completely open to everyone except my two in-laws. They're conservative, and my wife simply doesn't want me to tell them I'm atheist. Every once in a while, I think about telling them but don't.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell