Everyone is angry with me

I help and help and help for tonight’s dinner and yet my mum makes me feel like a slave. She yells at me and gets annoyed at me. And my sister is there in her pajamas watching movies, doesn’t help with anything and nobody asks her to help with something. She seems annoyed with me also and doesn’t talk to me today. I hate finishing 2019 like this and I don’t know what to do. I feel like they’re attacking my father the same way also. I think all of the attack is because me and my father really wanted to have the party and because my mother and sister didn’t want to they are against us and try to make us feel like shit. My father right now is outside in the cold trying to start the barbecue and I’m upset. I just feel unfair that my sister is not asked to help and that it is demanded for me to do so. As if I’m the only one that will enjoy the party.