I got what you might search for, tailbone pillow. Bought a replacement for my rear ended trailblazer, need to tow boat and trailer sometimes, wife liked it so much I let her have it and took the rav4. Sure it is not as easy to get into, and not enough legroom to make me happy, but it is a good car and I can deal with it. Just saying sometimes you just need something that goes when you hit the gas and stops when you hit the brakes, and I am not going shopping for another car.
Give her the car and say deal with it or trade it in on something you might like better and the loan is on your dime is what i would tell my daughter.