Clearly your fault for being able to afford and own a nice car. And since you can afford a nice car no big deal for your loss. Note this is sarcasm.
I've owned some nice cars and had this exact crap happen to me on two occasions. Once a stranger and police ended up being involved. Once an ex gf. When I told her to keep the dog off my car she joked that's just how he is. That is why we are ex.
I'd mention it to the uncle. if he reacts with anything other than offering to help pay for repairs or assist repair then he gets socks for Christmas.
Fortunately if the scratches are just in the clear coat its an easy fix. Maybe a little light wet sanding with high grit paper and polish out with a buffer. I like the variable speed buffer from HF and CarBrite Workout and Black Pearl compounds. If you dont feel like buying the tools and materials and doing it yourself any paint shop should be able to do this in about an hour.