My husband the father of my children passed in 2009. I noticed some time after that my son was lying a lot. My son is now 18 and the lying hasn’t stopped. He lies about everything. The other day when I got home one of the kids had done the dishes. I asked my son who did the dishes? He said his sister did. When I said something to her about the dishes turns out he lied. He had done the dishes. I don’t understand why anyone would lie like this. I taught my children the importance of being honest and trustworthy and l have done my best to lead by example which makes this extreamly frustrating. Please help me help him fix this.