Witnesses don't form relationships, they take hostages. Keep em away!
I'm going to use that one! If you don't mind of course.
Me and my wife are expecting our first child and this was something we are trying to figure out because we are not DFed but we have not gone to a meeting for over 2 years so we are sort of unofficially DAed. I really would not leave my child alone with my believing in-laws or my believing dad, it's very sad but it's almost impossible for them to respect your wishes when it comes to religion.