Can I complain about my dads wife having friends over this weekend?

My dad is going to Reno for the Super Bowl. His wife( she got cancer) is having her daugher, 2 sisters, and 2 girlfriends over this weekend. I asked if I could stay around and she said I could be her BUTLER? WTF? So, she is kinda saying LEAVE? or do what I want? I really want to express my feelings about this weekend, but don't want to create drama between us. Why does she need 5 or more people? Now, I won't be able to even watch the Super Bowl at my own house. thats messed up. any advice....most of you will bash me becasue I PERFER quit over all these people in the house.