i guess im irked...

So today started off really well. Me and my fiance are now walking around our house in absolute silence to each other because apparently I'm in a bad mood for no reason according to him. I take care of my brother with autism and he also struggles to to to men from ptsd with my mother, her boyfriends and even kids around the neighborhood constantly severely abusing him in his life. So he always seeks me out for reassurance. Well, my fiance considers it as my brother ignoring him and basically laughing in his face even when I've explained it to him multiple times how it works. For some reason my fiance just always has to belittle my brother aaaaaaaaall the time. Constantly. Over everything. Mind you, my brother pays for ALL the groceries but doesn't get to pick anything half the time because my fiance says he's never being good. So while he gets anything he wants, my brother gets nothing. I even had to take away his card from my fiance because he started using it for everything instead of paying with his own money. Anyway, I got pissed off this morning because my fiance just couldn't let my brother enjoy having his drink from McDonald's this morning. Not even to drink it, just to have it with him in the back seat. He said he didn't want to deal with my brother spilling it because thats all he does in the car. My brother only spilled something maybe twice, on accident. I told him I'd clean it but he just argued with me and wouldn't let it go at all. So I calmed myself down and he made more sparky comments about my 'bitch voice' going away. I reminded him I'm being nice in front of the baby. Hours later, my brothers doing his chores and im trying to get stuff done while he has the baby and he keeps nagging on me to finish painting our cabinets even though I'm trying to get my own list of things done. He says he's tired of waiting on me to do it and that whatever im doing can wait. I haven't been able to do my to do list for MONTHS and he's upset that the cabinets are taking a little longer than he'd like because he's the one that got impatient and took them off in the first place. So he gets pissed off, takes the baby and goes for a walk saying its bad that he has to leave to get away from me. I've felt like that for months but put up with it because of the baby. I'm just over him being so selfish and childish all the time. Like I have stuff I want to do and he doesn't have to constantly bully my brother who's doing ALL his housework and chores and paying for all the food that he eats and even paying for family dinners that he doesn't even get to pick his own food from. I just don't know what to do at this point except for staying in my room and laying down with the baby so he leaves us alone.

I guess I'm pissed off...

Also, if you decide to comment even after reading all that, don't take his side. My brother and I did nothing wrong even if I didn't word it right. I'm just venting