Won't the baby miss their real mother?

This was the question asked by my six (going on 16) year old niece yesterday when I was explaining to her that J and I were adopting a baby and what adoption meant. I also told her the news last week as well and I figured that each time I see her we will have a little conversation about adoption so that she is prepared and understands when the time comes to bring the baby home. I thought this would be a good idea until she asked me the question. What a simple question yet complicated to answer. I did the best I could by telling her that of course the baby will miss their mommy but that I will be the baby's new mommy because the birth mommy was unable to care for the baby. I really felt awkward answering this question to a six year old but I figured I answered it somwhat ok. I decided that we would not discuss it everytime we saw each other but that I was definatley going to prepare myself to answer such honest questions. I realized that just as I am trying to educate her I am educating myself.
Then she proclaims that if it's a boy she thinks we should call him Kozmo! This could only come from a six year old. I told her that Kozmo can be her nickname for him if we do get a boy.