Congratulations Dan.
A friend of mine took care of a special needs baby that was a ward of the court. You can imagine what happened, after a few weeks she wasn't about to give him back so she adopted him. I didn't see them for a couple of years until I ran into them grocery shopping, her son, now 3, took one look at me, yelled "Daddy!" and ran down the aisle to me. It was pretty funny since I look nothing like her husband or his birth parents. Never did figure that one out.