Pro3rdParent: 16nb at time of incident. 18nb currently Brother: 18m at time of incident. 20m currently

I got a puppy over covid, this was a big deal for me because I've always had an intense fear of dogs. He was 30% sweet and 100% demon from hell. He was a biter and then some, I still loved him, but I distanced myself from him a bit and asked my dad and brother to step in and help out a bit. But I still loved him and would walk and play with him. Well one day my brother went out to give him some water and when he opened the gate, he bolted into the road and was hit by a car. I was in the middle of zoom class, but I dropped everything to take him to the vet. The driver that hit him was super apologetic and helped us get him to the vet. It was a very stressful 48 hours, but ultimately my puppy did not make it.

Now a bit of relevant information, I have always been the emotional rock of the family, while everyone else could be upset, I remain stony faced on the outside, and push my feelings aside to help everyone cope. My brother was depressed, and he got the collar. But no one cared because he was the super sensitive one, especially when it came to animals. But I wanted that collar, Appa was the first dog that I really raised and bonded with. Despite him being an ass, he was my best friend. Not even 2 weeks after he passed, a family friend gave my brother a new puppy, who I ended up taking care of for a month before my brother would even look at him. I've always blamed myself for his death because I had the chance to fill his water dish earlier that morning, but I didn't because I was worried about missing a test. My brother got all the sympathy and a new dog, all I really want is the collar from my dog, so I can have a little closure.

My brother currently refuses to acknowledge my existence, so would I be the buttface for asking my mom if I can have the collar?