We have been having trouble with my dd for quite some time and she has been referred to CAHMS for anxiety. This sneakiness and lying is a new thing though, it's little things for example she has an hour timed on her computer/tablet after school and the last couple of times we have noticed that the timer has been changed so she has more time...she swears blind it's not her that's done it. The same with an attempted forged signature in a school book yesterday, she swears blind it's not her although she did later confess to me. I just don't get it, it's so obvious she's lying and I've explained that she won't get more independence if we can't trust her.
She is now in tears in her room and her computer time has even lost tomorrow because she just cannot admit she has done something. I'd be much less angry about the actual misdeed, it's the lying I can't stand!
How do I tackle this?