Sitting with a group of friends (including my sister). We were talking about all sorts but the conversation moved to food shopping. One of my friends asked me if I’d been to the newly opened higher end supermarket. I said I had after work and that we’d got some amazing yellow sticker items for the freezer. My sister declared ‘I don’t go there personally. I can’t afford it’ and laughed to herself but I could see peripherally she was looking at me the whole time. She and BIL are very big earners and way outearn me and DH, which she will know. I was left feeling awkward and didn’t really know what to respond with. It kind of dampened the conversation too. What could her intention here be - anything other than to show me up? I don’t feel I could confront her as she would downplay it and say I’m taking meaning from it that wasn’t there/making things up. It was less that she said it and more how she stared me down as she did.