My inlaws were always fairly interested in our children (their grandchildren) and looked after them every couple of weeks, but since SIL has had a baby, they are ploughing all of their time and energy into their new grandchild. This is despite SIL being on maternity leave. They are accompanying SIL and the baby single every day to different activities or watching the baby for her so that she can do other things. SIL has always been enmeshed with her parents and it is now causing what looks like, favouritism for her child. They are all together every day. And no doubt when SIL returns to work, they'll be caring for the baby then too.
We thought that perhaps the novelty would wear off but the baby is now 6 months old and they are very rarely interested or available for our children anymore. Our kids have noticed this too which is heart breaking.
It seems that it's common for grandparents to favour their daughter's children over their sons from what I hear, but I don't know how DH hasn't flagged this up with them by now.
And SIL hasn't given our children a second thought when she's asking her parents to have the baby for her all the time so that she can get her nails done, shopping, lunch with friends etc. They have quickly become very neglected by ILs and my own parents live abroad so it's not like they have them close by.
How do we soften this shitty blow for our children?