I'm so sorry to hear about the accident your wife was in. It's definitely a tough situation to be in, especially when you're not sure if the car is going to be a total loss or not. As for the rental car, it's definitely the responsibility of the at fault driver's insurance company to provide one for you while you're waiting for your car to be repaired or replaced. I was in a similar situation a few years ago, and my
workplace injury lawyer helped me navigate the process and made sure that the other driver's insurance company covered everything they were supposed to. It's definitely worth reaching out to them and asking about it. Good luck!