AITA for refusing to lend my brother my car even though he had a job interview?

The last time my brother Aaron borrowed my car, he returned it with an empty tank and a parking ticket folded into the cup holder. He paid both after I chased him for three weeks.

I told him he would not borrow it again.

Two months later, his ride canceled forty minutes before a job interview. The office was across town. A rideshare would cost about $55 and the bus would make him late.

Aaron asked for my keys. I reminded him of the rule. He said a job interview was different from borrowing the car for errands and promised to fill the tank before returning it.

I still said no.

He booked the rideshare, but the driver canceled. The second car arrived late, and Aaron reached the interview twelve minutes after the scheduled time. He did not get the job.

He cannot prove the lateness decided it, but he believes it did. Our mother says I let an old parking ticket matter more than his chance to get back on his feet.

I could have driven him myself, but I was working from home and had a meeting. I probably could have joined from my phone. I did not offer because I wanted the consequence of my earlier boundary to remain his problem, not become a new task for me.

Aaron has repaid what he owed. That weakens my practical reason and leaves the trust issue. I keep saying the interview was not my emergency. I also know I watched an emergency become worse while my car sat outside.