I'm really at a loss on what to do with my almost 11 year old. He lies all the time. Some times it's serious lies but most of them are so stupid. Like today, I told him to keep an eye on his sister for a second so I could pee. She was sleeping. I come out of the bathroom and he's getting up from the computer chair. I said "I thought you were suppose to be watching your sister" He says he was but the chair was out of place so he needed to put it back. <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/lol.gif" style="border:0px solid;" title="lol"> Yeah ok like I believe that one. He knows he's not going to get yelled at for telling the truth even if it's something bad, so I just don't get the lying. I try talking to him about it and he acknowledges what I say and then the next day he's lying again. Is it an age thing or do we have a problem with lying or maybe I'm just over-reacting?