X.O.
You know, my mom doesn't even HAVE a FB account, but she does this to me constantly. Most recently, I asked her opinion on something about starting my own business, and specifically said, "Please do not do any research on this--just off the top of your head..."and then asked my question. She, in turn, forwarded my email to my uncle and my aunt, each of who own their own businesses, and asked for their input. Yeah. Um. Thanks, Mom!
So, my point is, if not on a FB format, your mom and other over-sharers will find other ways to share your juicy news. They'll email, or call, or tell all the nice ladies at church...and you really can't do anything about it, other than telling her that you'd like to keep your news on the down-low. Good luck!