Who's her daddy?

So, I think I'm pretty prepared for the question I'll get from Markin someday - "Who's my daddy?" It's one I thought about how I'd answer long before she was conceived! One question I found out I'm not prepared for is "Who is her daddy?" When an adult asks, I willingly tell them I used a sperm donor (and how long I had to wait to get her!) - but how do I answer that when another child or a young adult asks? I don't know how open that family is to talking about it! Even with my niece, I avoided the question because I wasn't 100% sure what she really was asking. She worded it funny - something about "Is there a daddy at your house?" and I answered no, but didn't go into details -- and should have because I know my sister would be okay with it. However, she accepted my answer and I'm sure the opportunity to talk about it again will come up! A very nice young man with a disability approached me the other day and asked where Markin's dad was. I just told him that she doesn't have a dad, but he looked really confused and tried asking again but I just repeated that she doesn't have one. But, how much info should I give out to youngsters? Also -- my students' parents know I'm a single mom by choice but I don't go into details with my students and, thankfully, they haven't asked - yet! yet! ............................................................................................................................... ......................................................... And, guess what? Markin and I are already talking about the donor! She loves to say "dada" and I reply, "no dada, I'm mama" which just gets her laughing and she says "dada" again and it ends up like a game. She has said "mama" and "mommy" a few times, but "dada" is her favorite thing to say. ............................................................................................................................... .............................................. My sister is so sweet! She asked me if she could take Markin shopping for Mother's Day! She wants to make it an annual tradition. Just having Markin is enough of a Mother's Day gift! I asked her if she'd do it for my birthday instead since I bet her day care (and later school) will do something for Mother's Day and Christmas, but it was so sweet of her to think of that!