So today I looked after my brothers girlfriends daughter for the day as she was working and her child care fell through. She is a relatively new girlfriend of about 9 months but due to covid I haven't really spent much time with her or her daughter but my brother is happy so that's ok with me. My dd is a year younger so it was no skin off my nose to have her here for the day, the girls played nicely and entertained each other. I asked her mum when she dropped her off if she had any allergies, things she didn't want her to have or things she didn't like, mum said she ate most things. She had lunch and dinner here so mum really should of said if there was things her daughter wasn't allowed to eat. The girls had bagels cream cheese, grapes, carrot sticks for lunch, crisps in the afternoon and chorizo pasta bake for dinner with peas and garlic bread with chocolate ice cream for pudding. Well my brother has rang kicking for because the child is vegetarian and her mum is very upset I didn't respect that, how the bloody hell am I suppose to know this? I asked mum and she didn't say her reply was she eats most things, no mention of her being a vegetarian at all. AIBU on to think this is mums fault and if she didn't say how was I suppose to know, her dd is 7 if that makes any difference and she didn't tell me herself.