Little scenario. I'm not saying who's who, I just need unbiased views please.
Persons A and B are married with two daughters aged 5 and 9.
Person A's sister messaged person B to let them know she has bought a present for eldest daughter and can she come round to give it to her.
Person B said yes but can you make it tomorrow when youngest daughter is at school. Reason being youngest won't understand why she hasn't been given anything and will feel like an obvious display of favouritism, which person B felt was not fair.
Just to note, it's no ones birthday and there hasn't been any occurrences when person A's sister has given youngest daughter a present and not eldest. Persons A and B and daughters don't see person A's sister very often (not sure if that has any relevance).
Person A can't understand why person B insisted on youngest not being there and that she'll have to toughen up eventually, why not now.
Views please. Who's BU? Thank you for reading!