I Have a Big Family

I am one of the little ones. I am number five in a family of six children. Five of us are girls. We are three girls, my older sisters, my brother, then me then my little sister who is taller than me!
My Mam seems to have difficulty remembering my name. She remembers my brother’s name and my little sister’s. And she’s ok with my older sisters apart from Jenny and Karen. She mixes them up. But she’s at a loss to remember my name so she calls me Number 5.