AITA for how I treated my half brother?
After my(F15) mom(F40) went homeless, my dad(M44) let her and her kids move in with us out of pity.
My dad is at work from 9 to 17 and he absolutely hates sandwiches and cold food or leftovers. Now that I have some free time I like to cook him lunch and take to his workplace for him.
Yesterday I got home to see that my own portion of food is gone. My half brother(M13) apologized and said he was really hungry and it smelled good.
Some backstory is that my mom's kids stay home all day and are expected to make a sandwich or something (with groceries their own mom buys)
He said he was sick of sandwiches and I always cook these nice meals and won't share with them.
I got angry and told him it was my lunch that he ate and sent him to his room.
When my mom came home she got angry and said I'm a selfish bitch for treating my half brother like that. She said she'll pay me for the meal and said it wouldn't kill me to cook for my half siblings as well.
I told her this is her job not mine and I'm sick of her attitude and had to go hungry for an hour because of her son. She called me an asshole.