A few of us were queueing up at the self service tills. Two of them were out of order and a woman in front of me with a little boy was grousing and giving out. She then went up to one of the tills and put her basket down while the person using it was still packing her bag. She looked a bit annoyed and reached over grousy woman to look for her receipt amongst the pile that had built up in the receipt slot. At which point the woman removed her basket with a sigh and said loudly 'could you be any slower' (the shopper had been going at a perfectly normal speed, hadn't needed authorisation for anything, or put anything 'unexpected' in the bagging area).
After the shopper was gone the woman rolled her eyes up to heaven and grimaced at me. I said 'actually, you were very rude. And setting your son a bad example'.
She gave me a filthy look. I was telling my mum and she said I should have kept out of it.
Feel bad now. WIBU to say something to this woman?