Decided to have McDonald’s for dinner as not really feeling 100% and couldn’t be arsed to cook, DP took my sister (15) and when they were on the way there she calls to ask if they can get Pizza Hut instead. I said no because the kids already know we are having McDonald’s and DS has asd and once he knows that’s it. Also it’s super expensive. So DP calls me to remind him of the PIN number for shared credit card and tells me DSis is only getting a McFlurry. They get in and she’s automatically in a mood because I wouldn’t spend the £11.99 on the Pizza Hut deal for her forgetting there are 4 more of us so it will cost considerably more. She’s telling the dog that no one cares about her, the kids always come first etc etc. She knew before she left they were going to McDonald’s and didnt say anything. She’s tried this before and my mum has told her to stop being ungrateful but as my mums at work she’s gone full on no one cares, my brother comes in and asks her what’s wrong and she tells him and as he’s not agreed with her she’s gone up stairs. She said she can’t pay herself because she needs her money to go to someone’s birthday dinner tomorrow. Tell me I’m not being unreasonable as she’s lucky she was getting McDonald’s. We include her in everything, even take her on holiday every year as my mum doesn’t travel. I just feel like I’m being made out to be the bad guy just because I’m not putting up with her Brattish ways.