Here goes:
I have 2 DCs -DS (8) DD (5)
I have 2 nieces the eldest of whom is also 5 (DN)
My brother has had some issues -poor decisions, gambling problem, low level depression. DM looks after his 2 children a lot as they live nearby.
Since DD was born DM has treated her as competition for DN-every milestone she’s reached “oh yes DN does that”, any present I bought for DD she went out and bought DN.
This has escalated since they started school in September to the point where I say “DD has won a certificate for x” and she barely acknowledges it. It should be noted that for DS who was her first grandchild she is over the top enthusiastic about everything. At the end of term I showed her DD’s school reports -she said “ oh yes DN got an excellent one”. At my other brothers at Christmas he commented on how good DD’s writing is -she then spent five minutes explaining DNs school report in great detail in direct response. She also ridiculed DD for making a mistake in counting to 100-when in fact she did it perfectly.
On the way out DS gave my brother a hug. DM said “oh he’s so affectionate isn’t he lovely”, DD went to give him a hug (granted not quite as exuberantly but she’s naturally a bit shy) and she said “she’s not”.
To start with I told myself I was being silly but DH has noticed it, as had my other brother and his wife who think it is really bad.
AIBU to say something to her or do I just keep my kids away from her as DH thinks I should?