NC because it's identifiable. There's a bit of ill feeling involved too if I'm honest, but AIBU not to want to pay for a tux for DH, cocktail dress for me (zero chance they'd be worn again and I TBH even hiring is an expense I could do without) only to chase the DCs round all afternoon and evening? Is it a bit pissy of me to decline on that basis? We don't have much money; they do and probably would not think this reasonable grounds for declining.