My mother

My grandfather was nice enough to buy me a car I let my mother borrow it once and she lost the key he paid $175 to get it fixed , now that it's fixed she asked to drive it again and I said no she has her own car that was working fine now that mine is fixed she claims there are so many things wrong with it 🤦🏼 I'm 19 and I'm 6 weeks pregnant I need to keep my car in good condition but she doesn't seem to understand that...now she's been angry with me for 2 days and I'm not even sure why 🤦🏼🙄