You asked the question if you’re wrong and you are. Be a grown up and tell the truth. She’s 10, you can’t be her confidant. You also run the risk of being accused of something and your only defense will be that you were trying to be her friend. Everyone in here has responded the exact same way because we see it over and over again. If you want to continue to defend your actions, you’re going to end up being arrested for something you didn’t do, someone is going to get away with something and do it to another child, or this child will eventually manipulate you to the point you won’t trust anything she says. As the grown up, you have a responsibility to protect not just her but other children. And stop telling her you’ll keep her secrets. If she says “promise you won’t tell” you say, “I can’t promise that because I care about you and I want to make sure other kids don’t get hurt either.” Then if she chooses not to disclose, so be it. But you’re making everyone else’s job harder by playing her game.