What do you think of me telling my boss that my coworker has been lying about her hours, even though she has been very nice to me?
This sounds like a tough situation to decide what to do.
I think she should be punished for what she's doing and she shouldn't get away with it.
It's probably the right thing to do to tell your boss. She should know better than to lie about her hours and you shouldn't have to protect her.
I don't know, I'm not the boss and why do I care if someone else is lying about their hours? Her boss should have figured it out.
Boss's are very busy and they can't watch everyone. It's good when employees speak out against fraud. It helps the company and helps other employees that are honest about their work.