6 year old DD has started lying about everything recently. Doesn't matter how big or small, she seems to think not telling the truth is funny and no punishment has any effect.
She's now doing this at school. Teacher has tried moving her around different groups of pupils, but she's now disruptive to them and continues to lie.
So she's sat on her own.
We've recently had DC3 and she is DC1 so this could of had an impact, but the lying has been going on long before he was born.
She's clearly not happy.
How can I help her?