Is OTHER wrong in the post ? POST : Ok basically my old beater car, a 2004 sunfire had broke down, so we got it towed to a mechanic to see what was wrong with it. In the meantime my mom got a new car and I had been driving her old one. The mechanic got back to us saying it just needed a new battery but we didn't have enough space for three cars so I told my mom if she covered the fixing cost I could sell it, and she agreed. 

Well today I told her that I had been trying to find a buyer for $600 and she told me that I should give it to my late stepdads nephew. I told her that I didn't want to give it away for free and she said that I should. But I kept saying I wouldn't because it just got new brakes, new battery, oil changed recently and I put a new radio in it. So I wanted to get at least $600 for it. My mom kept guilt tripping me into giving away my car but I kept saying no. Then she says "fine, sell it. But if you do you're gonna give me the money because I paid for the brake repairs." I said that was bullshit and I'm not gonna do that because I'm pretty pressed for cash right now, being a student. She told me if I did sell it she would take the money but since I've been taking law I told her that she can't legally do that. Now she's being petty and guilt tripping me and saying "I won't do shit for you." 

I'm being steadfast in my position but I'm wondering if I am actually being an asshole. 