Ending a parent teachers conference over a broken mug

My wife thinks I overreacted so I want to know if I did. Last year was my first year teaching. I was a theater nerd in high school and I talked about it with my students. I'm still a theater nerd. One of my 8th graders gave me a Hamilton mug last year for Christmas. It had some of the best lines like "Not throwing away my shot" "Raise a glass to freedom" etc. I loved it. Not just because it's Hamilton but my student got it for me. I had this parent in my office who was mad at me and said I am just punishing her child because I hate her. This mom wanted me to let her child redo all the assignments she scored lower than an A on so they can get her grade from an 83 to and A. I said no because I don't have the time to grade all that. That's a lot of stuff and I'm sorry but I can't let you redo a bunch of assignments a couple weeks before winter break just because you didn't get an A. I have to have grades in soon. She was yelling me and saying I just hate her child and want her to fail. She was swinging her arms around and hit my mug and broke it. I said "Seriously?" And she completely ignored that she broke it and kept yelling. I said "Listen. If you're just gonna yell at me and break my things then we are done with this conference." She said "No we aren't. And it's a damn mug. They're like a dollar." I told her the conference was over and she was screaming and I told her if she doesn't go I'm just gonna call security. My wife said she understands why I was upset. I mean a student who's now in high school gave it to me but said I shouldn't have endednthe conference over it and the mom was just emotional. I don't think just because she was emotional means I have to be verbally abused by her and have my things broken.