My Dad is bringing his new wife to my college parents weekend WITH MY MOM. What do I do?

Hi all. I need some advice. My parents have been divorced since 2022. My dad immediately started dating after my mom told him she wanted a divorce. he is an extremely narcissistic man, and those traits have continued to show up throughout our relationship, ESPECIALLY after my parents got divorced as now my mom was not taking the brunt of it. I remember when our relationship started taking a turn for the worst; he told me he “would never date a woman with a belly piercing like me because they are whores,” and “haven’t you talked to your mom enough” after my mom had just had major surgery. so yes, those are just a few things that my asshole of a dad has pulled. So yes back to his new wife. let’s call her Veronica. Veronica (52F) got married to my dad (50M) about a year ago. I was not invited to his wedding, and was not invited to any formal reception. He never made an effort to reach out or see me unless my mom did. finally I mustered up the courage to stand up to him, unfortunately on a vacation for 3 days. I texted him beforehand (about 3-4 weeks before) and told him that I didnt want to talk to him at the moment because when I did he made me feel ashamed of myself. He said we would talk about that in Mexico and that he loved me and blah blah blah. my first few days in Mexico were so fun, as I was with my mom, but when my dad came shit hit the fan. I told him EVERYTHING that was on my mind. he refused to take accountability for anything, and when I told him that I didn’t feel welcome in his house he told me that “he had been nothing but welcoming” meanwhile he actively talks shit about my mom in front of me and says racial slurs at the dinner table. He thought the conversation went well and left it to rest for a few hours until dinner. I called my mom sobbing and told her what happened. She told me I was more than welcome to change my flight and that I could stay with her, and that she loved and supported me. I told him at dinner that I was flying home early the next morning and that I felt like he hadn’t listened to me during our earlier conversation. I told him I wanted space and didn’t want to talk to him for at least 60 days. He proceeded to immediately try and hug me and text me about ever hour of the next day. It’s almost like he hadn’t even listened. I stopped texting him back after I arrived home and he has stopped texting me as frequently. However, my parents weekend at my college is coming up next week, and my dad is insisting on bringing his Veronica, even though he knows my mom will be there. this will be so awkward for me, but he insists that he is coming and has booked the flights. He also, after hearing that my mom is taking my boyfriend and I to dinner, insisted on taking him and I to lunch. I don’t want to do this, but I’m scared to stand up to him. Do I tell him not to come? Do I tell him that I am not going to go to lunch with him? Do I ask him not to bring Veronica? WHAT SHOULD I DO?