AITAH for not wanting to take care of my special needs brother?
My (24M) parents' (61F and 58M) 25th wedding anniversary is next month. My brother (11M) is low functioning autistic and has to be home schooled. For their anniversary, my parents have decided to go to Italy as they were originally supposed to go there for their honeymoon but it had to be cancelled due to unforseen circumstances. I haven't lived at home with my parents for almost 3 years now as I moved in with my girlfriend. They are asking me to take care of my brother for the entire week that they will be away because they saved up all their money for this vacation and can't afford a sitter because it's expensive to get sitters for special needs kids. They say that they have prepared work that he can do and they need me to make sure he gets it done and to cook his food for him everyday. I know it sounds selfish, but I feel this is completely unfair on me. I am just starting to get successful with my day trading and having to watch my brother all day for a week will distract me and potentially lose me a lot of money. I also feel like this will hurt my relationship with my girlfriend, as she hates kids and always talks about how my brother is "creepy" and I feel that making her spend time with him will make her start to resent me. I also feel like this is them testing the waters to see if they can dump him on me in a few years so they can retire. I never asked to have a special needs brother and I know it's not his fault and he needs someone to look after him but I don't think I should be forced to do it.
AITAH?
EDIT: I feel I haven't given all the context in the main post so I'll link some of my comments that explain some important things further