I live in an apartment with my girlfriend and when I request a quote on the car insurance websites it asks me if I'm the only driver in my household. It's my car but she would likely drive it occasionally. She has her own car and insurance that she would drive normally.
Why do I need to put her information into these quotes? Doesn't her insurance cover her driving other people's cars? I got two different quotes -- one with her as a driver and one without and they were radically different prices. I'm trying to save money here without mistaking how this is supposed to work.