Nine. She's always been like this. At first I thought she was just being a normal kid, right? Load, annoying and stubborn. But she's old enough now to have grown out of that now. She hasn't. She is, imo, a stubborn person, and it's not just cos of her age.
Demanding food at odd times, screaming 'MUM SAID I COULD (insert pointless, almost certainly not Mum-approved activity here)!!1!1!!one!!' at the top of her voice, and threatening (actually threatening) to tell on me if I didn't let her do something. *raises hands in supplication* What's a teenager to do, huh?