<human>: The place I work is near my girlfriend's home. During lunch time, sometimes I buy lunch for her and I to eat at her house. What's annoying is when she asks me "can you buy for my brothers (she has 2) as well?" I end up saying okay cause if I don't, it feels weird eating in front of them with my girlfriend cause they usually have to find food in the house to eat.  (Their family owns a restaurant and because of that they rarely have food in their house. Their reason was they live so close to the restaurant they can just ask for food and their father can just cook and bring to them. Also their father has OCD cause cooking will cause a "smell" in the house.) So I'm like okay great, my 7$ lunch became a almost 30$ lunch everyday. I try to bring food from home so I don't have to buy however there are days when I just like to eat out. I feel the only solution is just to find food or eat without her and tell her I already ate. I guess I feel annoyed because I feel like I'm feeding her family when it's not my responsibility

Can you condense the text into a few key points?
<bot>: Buy lunch for myself and girlfriend, end up buying lunch for her and her brothers; my 7$ lunch becomes a 21-30$ lunch now