Great question! I'll be keeping a close eye out on this thread.
I'm really wondering the same thing myself. I have a lot of friends/family as clients, and they of course know everything about me, lol.
All of my other clients found me through my web site, so they hardly know any personal info at all. A few know I have a young child, but most keep it strictly professional.
That's where I'm in a big dilemma over whether or not I should link my business site to my blog. I'm open in my blog, including about the fact that I work full time and freelance part time. I'd imagine that would be a turn off to some potential clients (though all of my existing clients know my work situation and are OK with it because I get the job done!).
I'm always reading about how blogs are great for getting business, but so far none of the inquiries from my blog have turned into anything. All of my jobs are either people I know personally, or referrals from clients... or people who found me on the search engines. AKA they know nothing about me.
So... I'm kind of stuck as far as what I want to do in linking my main site to the blog, because so far it hasn't helped me, lol.
I'm wondering what everyone else does? As far as the Mom thing - if they don't know me, and don't ask, then I don't bring it up. If someone mentions they have a child or asks me, etc, then I do go a little more personal.
I dunno.... I'm looking forward to your responses!