AITA for refusing to lend my dad my house for his company’s Christmas party?

My (29F) dad (52M) is the CEO of a software company. It’s not the biggest company, but it’s been in the market for 10+ years and is fairly well known in its niche. Due to some issues with their event space contract, they are in a bit of a crunch and he suggested using my house for their Christmas party (approximately 50 employees and their spouses). My mom (52F) is also a high-ranking employee there, and has the company pay her salary in part through our family business.<br><br>My husband (31M) and I own a house that my aunt and uncle bought for me when I was 22. I pay them $800/month plus 15% interest for it. I didn’t want to buy my own house because I felt like I wanted to travel and experience different things first, but I’m happy with my situation. My husband and I do pay for the property taxes and insurance, but my aunt and uncle are responsible for maintenance. The property is also equipped with an alarm system that they pay for, and they keep the remotes. I have asked them multiple times if I could take out the system temporarily for an event or party of my own, and they said no. <br><br>When my dad approached me about hosting the Christmas party, I politely declined. The party would include alcohol and food/drink consumption, and I do not have the ability to remotely disable the alarm system. He asked if I could have them disable it, but they’re out of town for the holiday and wouldn’t be able to. He offered to pay any costs related to setting up commercial-grade alarm systems for the evening, but I again declined, stating that I didn’t feel comfortable with a large group having access to my house without my being there. <br><br>My parents and some family members are extremely pissed off at me. My mom is crying about it and claims that I need to “do this one thing for my dad.” She also mentioned that this is a once-a-year thing and I’m basically just turning away potential future business customers. My aunt and uncle are angry too and have called me multiple times to scream at me about how selfish I’m being. I also have money thrown at me constantly for this purchase (on top of the $800/month principal, I get $5,600 a year for the property taxes and $2k for insurance) and they claim that I’m not putting my “fair share” into the pot for family expenses. This includes stuff that I don’t even use, like a family car that my uncle bought for my brother that he insists on paying for 100% (despite the fact that my brother works and pays insurance and gas, etc.). <br><br>My husband supports my decision but I think he also understands the anger towards me from my family, given that this house is an “inheritance” from them. My brother (24M) is also mad at me and claims that I’m basically throwing away future business for our family’s company. I still plan on using the house and hosting events of my own, and I don’t think it’s fair that I should have to accommodate my dad’s company over anything else. I am planning on hosting a Christmas Eve dinner at our house and my parents have made comments about how I’m welcome to host, but I’m not invited.<br><br>AITA?