DD is playing a star in the school nativity play (reception age) There are two other stars. When the letters were sent home to say who was playing what, DD's note stipulated that all she needed for her costume was yellow clothing and it suggested t-shirt and leggings. After trawling shops for a week for yellow arseing leggings, I finally found some today, along with a yellow top (harder than you might think in winter 
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Then at the school gate today, one of the other star mums said that she'd been to Tesco and bought a star costume for her DD. Now, I am annoyed for two reasons; 1. Her DD will look like the main star, the Beyonce of the stars and my my DD and the other girl will look like Kelly Rowland and the other one, and 2. DD is feeling hard done by that she has yellow clothes and a tinsel headband. I can see her point. I feel pressured to buy DD a star outfit now.
AIBU to think that the other mum is a show-off and a bit of a nob? It's a reception nativity play ffs. Just get the cheapo yellow clothes and stick some tinsel on yer kid's head.
Yes, I DO have bigger problems to worry about, yes I AM childish and I probably do need to suck it up. (Am a regular under a nc, by the way)