Non biological first born

Boy oh boy I was 17 almost 18 when my mother had my baby sister she started all over we do have two older brothers me being the baby before her being born so her father was never really involved so we spoiled her rotten I got to cut her umbilical cord and watch her beautiful life be born she is now going to be 8 soon and a aunty for the first time I don't know if it's the hormonal pregnancy emotions or what but I just miss my baby sissy being a baby and now her birthday is around the corner she is going to be a aunt but she will always be my first baby girl