Yes, I have been in that situation. It's like a punch in the gut, but of course you can't look at your clueless offspring and say, "What do you MEAN it's nothing personal? Hello, I'm your MOTHER! Did I raise you so stupid you don't know you're breaking my heart???"

So you look at your clueless offspring and say, "It's your life, dear, you have to do what's right for you." Then you cry all night.

That's been a hard thing for me to get my mind wrapped around, that a parent automatically thinks, "How will this affect my child?"...but not vice versa. At least not very often. *sigh*