your kid backed into a chevy. hard to get mad at that.
I didn't get angry at my daughter, either, when she crashed into my pristine Blazer S-10 years ago that I was selling. Looked brand new. So I parked it at the end of our long driveway because a potential buyer was coming over to look at it. It looked like a sure sale. My daughter (17 at the time) was leaving the house in a hurry, hopped into my wife's T-Bird and started backing out. Seconds later I heard BAM! She didn't notice my Blazer and rammed right into it, damaging the rear end and smashing the rear window. There was damage to my wife's rear end, too, but the Blazer took the brunt of it. I wasn't mad at my daughter either. Accidents happen. And she didn't get hurt. The funny part (ya gotta look for humor in a serious situation like that) is that the potential buyer showed up 10 minutes later, looked at the damage, asked me what happened, and said, "well, I guess the sale is off". Ya think! LOL. I had both vehicles repaired and sold the S-10.
Hope you get your Mustang properly fixed soon. Some day you will both look back on that day and honestly, you will both laugh. Right now, it's not humorous.