La tua cantante is the Italian expression for a human whose blood particularly appeals to a certain vampire in an extreme sense. In English, it means "your singer", but is usually shortened to "singer" whenever someone refers to her/him.
Singers are considered by most vampires to be a great find, the drinking of whose blood is an experience to be savored.
Rosie caused this. It's her fault we fight! Charlie and I were so happy when we found out we were having a child. We could afford one child but then she came along. A surprise! You must be so happy! The nurse had said but I felt no love towards the child. With her red hair. She wasn't wanted. We can't afford to keep her. She's tearing our marriage apart. I wish she had never been born.
"Who are you?" Bella asks finally and I smile slightly twirling the end of my hair nervously. "My name is Rosalinda.... I'm your twin sister.... hi" I whisper towards the end.