Ever have a pediatric client lie on you ?

One of my clients (who is mentally intact) lied on me on two different occasions. He also tattle tales on me if I don't do things EXACTLY how mom does it. I already felt this case was not the right fit, with these lies I'm really determined to drop this case for good. When I told the agency I may not be working this case anymore due to school schedule, she said the parents and the client really like me and want me to stay. I was shocked because all the little boy do is complain, whine, and complain.Here are examples of his lies:

1. He told mom that I did not give him any water because I said it was not in his chart to do so. This IS NOT true. The initial report I was given by my agency is that he is NPO, so when he requested the water I clarified this with mom and found orders, and gave him some water.

2. His parents took away his video game for punishment, he tells the parents that I said its ok for him to play his video games anyway. NOT true

3.He tattle tales as well- Last week I accidently made a blue streak on the wall. I told mom right away and she cleaned it. Well this week he tells on me to his dad that I ruined the wall. I was so embarrassed.

This makes me sad. I have never had any ill feelings toward children in my care. I LOVE kids. I have never had any complaints or been lied. How should I handle this ?