My ds who used to be so well behaved has now started lying. I first discovered it a few months ago and we had a long chat about why lying is bad, how the consequences if lying/punishment will be worse than if he tells the truth, stopping pocket money - all the usual things but it doesn't work. Another lie just happens again a few weeks/ days later. As far as I know all is well at school and he's generally happy - in fact others even comment about what a cheerful boy he is.
His father lied a lot and his lies contributed to us getting divorced.
I'm at a loss as to what to do about my ds's behaviour and how to stop him lying. Any thoughts would be very welcome. TIA