We have 4DCs ranging from 6 to 13. My inlaws have always favoured DS1. Being the eldest he was the first to be invited for day trips and sleep-overs from a very young age. The other three were not invited and this was fine as they were too young to notice. Over the past 2 years DS2 has also been invited on the sleepovers and days out.
The problem is that DS3 and DD1 have begun to question why they are never invited. I have always been able to explain it by saying that they are too young, but they now realise they are past the age when DS1 and DS2 started going.
It is apparent whenever we visit PILs that DS1 and DS2 are favoured and DS3 and DD1 are more, shall we say, tolerated. They are well behaved but I feel they are constantly being expected to act the age of their older siblings which is unfair and I do point this out when necessary. Their behaviour for their age is no different to how DS1 and DS2 used to be.
I would say that I don't actually want DS3 and DD1 to spend time alone with the PILs because they are treated differently but how on earth to I explain it to them? I always make sure we've got fun things planned when the oldest are away.
Any advice?