The Chronicles of Rowen (Chapter 2)

All of Rowen's thumb was solid metal. She didn't know when she got it, she didn't know how she got it but it was something to do with her mum. Rowen jotted some ideas in her notebook. She ripped out the page that she did the night before. She'd got to the bit where she had written The dragon slowly stirred.
Here's what she wrote:
A) Did Mum chop it off?
B)
She was just about to write B when she heard her Dad talking to her Aunt.
"Rowen's getting suspicious."
"Well what should we tell her?"
"We'll have to tell her the truth."