Derp.Your nephew/niece can be older than you.
I have 2 neicesI have 5 nephews.I'm about to have 2 more neices/nephews.
your sister is a whore
You and Madmitten are dumb.Several problems with that assumption.-Even if it were only one sibling having all those kids, it could be male or female.-They also aren't a whore if they're having all these children with one person.-It could be more than one of his siblings having children. You aren't just an uncle for one of your sibling's children.
Your parents will have two children: One, your sister, is already born.Your sister decides to have children and they're born before you're born.You are then born, and you are your sister's children's uncle.
because we were totally serious