Is AUTHOR wrong in the post ? POST : Background:

+ Mom
- Had surgery, can't drive until she recovers
- Travels 40 miles /wk MAX when she was healthy. Less now that she has retired
- Lives with me + wife
- Temp staying w/ my brother b/c he lives in a ranch and it's easier to walk
- After she heals, will move back in w/ us
- I alone pay ALL her expenses except car pmt &amp; car/health insurance which she pays for (mom, wife, &amp; my cars all on my policy)
- Mom's car: 2013 Honda ~34,000 miles
- My car: 2015 Sports car ~45,000 miles
- I typically pay for maintenance on her car

Prior to surgery, mom had been in a lot of pain for a month+ so she had not been driving her car much at all. After surgery, my wife &amp; I entered a major life event &amp; I decided it was a good idea to sell my car b/c I wanted to reduce expenses. As such, I posted my car for sale, parked it in the garage, but drove it 1 day /wk over 3 wks so it sells close to stated mileage. I decided to use mom’s car since it was in the driveway and not getting use. It needed to be driven to stay properly maintained. Not only that but she needed maintenance on her car &amp; I wanted it to get it to the proper mileage before I spent $250 to do it.

Flash fwd 3 weeks - my brother begins interrogating me about using my mom's car and how I'm putting miles on it (I put ~40 – 50 mi on it /day Mon-Fri) and if I get into an accident it will decrease her value instead of mine (implying I’d rather sacrifice her stuff instead of mine). I have 2 accidents on record in my car - 1 @ fault, the other not. No citations on record. My track record is pretty good and I'm a defensive driver. He's getting his panties in a bunch over me using my mom's car &amp; I don't see the issue b/c as I see it, if I need to use my mom's car, I will. Just like if he or sis needed it, they would use it, too. We see cars as "family" assets &amp; share whenever anyone is in need. He goes on about how I "feel" about my car &amp; honestly, yea I LIKE my car but not in love with it. If anyone in the family needed to use it, I'd give it to them but it's a sports car &amp; has no real-world utility so nobody has asked. I don't ever talk or brag about my car but he, on multiple occasions, has taken it upon himself to brag about it to company visiting my house &amp; will walk people down to the garage to show it off. I'm not a fan of this behavior AT ALL &amp; find it very awkward &amp; uncomfortable. Pretty sure he feels some type of way about me having the car.

I argue back with him stating he's making a lot of assumptions and making it seem like I'm stealing from mom. Yes, I'm using her car &amp; I'm keeping miles off mine so I can sell it to get a more practical one. She isn't using it &amp; he's being overly sensitive. This is my own opinion but I suspect he wants to "keep the miles off" so he can try to influence my mom into selling her car to him so his wife has a car as she currently doesn't.

Am I the asshole for using my mom's car while she heals?