So...my in laws live in Spain and once a year offer to pay for my DS, DSS and DSD flights to visit them (grown ups pay for themselves). Recently my BIL and SIL also moved to Spain with their son. They live coasts apart so are not close to each other.
They have decided that they are going to visit the inlaws in the summer and would like some company for their son so want my DSCs to come out to them utilising the flights paid for by grannie and grandad. At no point have they mentioned my DS (who is only 4). I'm slightly peeved about this as my son won't get his "holiday" with his brother and sister and that his grandparents have agreed to pay for the flights in this scenario; when they are usually of the opinion that no grandchild gets treated differently. DH is unsure what to do as the annual trip is the most time he gets to spend with his other two all year as we only have them at weekends bank hols etc.
Feels like we've put in a rubbish position whatever the outcome.