I lied to make my mom feel better
What made you lie to your mother?
I was just trying to make her happy
That's great that you want to make your mother happy, but it's best to be honest with family. If you think that you need to lie to someone you should try and think of why you feel that way.
It's temporary and my mom is a bad driver so I don't want her to feel bad.
You are a sweet child for wanting her to feel great, but sometimes honesty is the best thing. If she's a bad driver, don't you want everyone in the car to be safe? How about telling her, she would appreciate the critique and try to keep you safer.