NSBR: mommie help needed

[arenee]

My little one, DS 4 years old, has started telling lies. They aren't major but they are still lies. He isn't to go pees on the rocks. He can go pees in the trees. He was asked if he went pees on the trees and he said yes. It was pretty clear that he had gone on the rocks. He is to flush the toilet when he does his business and he will say he has when he hasn't. The lies are about things that dont tend to get him in a lot of trouble. He will get a swat if he does something dangerous but that is the major punishment. Otherwise he has a time out.

Any ideas on how to address this. Am I overreacting? I am thinking if he gets away with little things the lies will grow.

Thanks for your help