Becoming a grandmother is not one of life's free choices. You can pick your pet, your alma mater, and your spouse, but when and where you become a grandma is entirely up to your kids. You don't expect it, and you don't quite know how to respond.
Being a grandma, though, is as close as you may ever get to perfection. So learn the rules and secure your spot as one of the most important parts of your grandchildren's lives.