>>Not sure, if this is an OK question, but if it was organized through her sister's school, would it mean that her sister is your daughter or step-daughter as well?
>
>No. It is her step-sister from her father's 3rd marriage. She is the child of the woman he married. I have two step-daughters from his first marriage (I was wife #2). So my daughter has two half-sisters and one step sister.

I see - really complicated :)

I know one nice family in NY, who have 9 boys and one daughter (the last child).