Sneaky Smarty Pants

I know this is proof of what a little genius Tessa is, but it still bothers me. She is not very good at following rules when we're not in the room. If I tell her not to sit on the coffee table, the moment I leave the room, she's on it. This weekend, I had a glass of water on the coffee table and she kept wanting to drink out of it. I told her no and that was Mommy's water. I was on the floor and Ellis was next to me trying to climb onto the hearth. Tessa said "Mommy, look at Ellis" and as I tunred my head I saw her reach for my glass of water. She literally tried to bait & switch me. So now, in addition to all of the OTHER things I have to teach her, I have to teach her NOT to be sneaky.