My cat died thanks to my mother

My cat followed my mother outside and I always told her to make sure he never follows because he wants to follow us under the car and to for sure take him back in the house and if he refuses to be caught, use snacks or food and place it on the porch. But no, she didn’t. He followed and I wanted to check if the outdoor ferals/ neighbors cats were doing alright and there, I saw him freaking out and ran towards the porch from under the car, jumping and flipping, and he died. She ran over his neck and my baby died an agonizing death. I was freaking out and screamed telling her what the f*ck did she do and that I always told her to make sure he’s never under the car. I collapsed and broke down. My brother grabbed his body and she had the audacity to come and say let’s go. I never wanted to murder someone in my life until now. I still feel angry and sad. I truly don’t know how to move one from this or will I ever forgive this despicable hag.

Follow up: Thank you guys, I really needed someone there for me but I had no one irl. I read all your comments and condolences, and I feel honored. I already did have plans to move away from my family after I graduate uni to go off on my own but it looks like I have to speed the process up and do it during Uni. My mother still doesn’t talk to me, I’m guessing she thinks I never want to see her again but hearing her acting like normal hits super hard while I’m grieving in my room still. I myself don’t want to seek her out because if she’s really narcissistic as the comments said, she’ll try not to blame herself or even attack Neenee for being a dumb cat and I know I would lose it and it will turn into a physical altercation. I think I’ll just take things slowly now and hang out with my cats. I’ll be returning to campus on Monday and focus on doing stuff in Uni, hopefully the career event will start sooner, and see if there is some counseling I can seek at campus. Thank you all and have a blessed day.