I had a similar experience last month. We went to visit my S.O.'s sister in Memphis and dropped her '07 Kia off at the dealer for, some warranty work ( I could write a separate post about how she wound up with this car a longer mustachian tale). Her sister, who makes a lot more $ than we do loaned us the beater of her fleet, a Hummer H2. Everywhere I drove it, people treated us with deference and respect, even though it is an uncomfortable, poorly performing, inefficient piece of shit that will likely be in a scrap yard before the KIA's warranty expires. I was embarrassed too I wanted to tell everyone: It is not mine, I'm just borrowing it. I thanked her sister anyway.