I’ve posted on here about my SIL before. Anyway on Saturday her and my BIW were invited to mine for a BBQ I don’t live with my partner as yet -but I’m calling them in laws for convenience. Anyway my partner and I spent time preparing food -marinades etc. They rock up and say they’re not hungry cos the they stopped for bloody fish and chips . BIW claimed not to know it was a BBQ . But I’d had several texts even mentioning the word BBQ going back and forth with her , one even asking if there was anything they didn’t bloody eat! She replied no. Partner I think was more than embarrassed . I fumed for the rest of the day. I really want to message her telling her what I think of her pig ignorant behaviour. I could give him the benefit of the doubt -maybe she didn’t tell him him we were eating. He did look embarrassed .But her? No way .