How refreshing! I have been honest about having a daughter. I don't say I placed her because I never get enough questions to have to (and I hope I never do), but I say "Yes, I have a daughter." and I have a picture of her on my desk.
It has made everything so much easier. Now when I talk about things at work, I don't have to watch what I say. For example, one of my co-workers is former military as am I. I asked because I could tell, and then we had a long chat about it. I got out of the military because I was pregnant. It was awesome to be able to tell the truth.