Been brewing in this a few weeks. DCs both had birthdays in the last few weeks. Every year the in-laws spoil the other grand children on their birthdays, one recently got £300 worth of riding equipment and the other equally expensive birthday gifts. My DCs got £20 in a card. Would this piss you off? Normally I’d think £20 in a card is very generous, but knowing how much they spend on the other DGCs ( because we were there when gifts were presented) just really pisses me off, especially when my DCs see the blatant favouritism. DH just says welcome to my world as this was his life and still is when it comes to being treat different to his sibling. For clarity all grandchildren between ages of 8-14 yo.