To everyone who is trying to add relationship contacts to the voice commands: just use voice commands by name. Say I have a fiancee named Anna. Instead of telling Google Now to "call my fiancee," I'm just saying, "Ok, Google, call Anna." Quit overthinking stuff.
For familial names like Mom, or Uncle Dennis, just store those contacts with those familial names. Then GNow won't have a problem recognizing those names.#Simple
solutions to "complicated" problems.