I have 4DC, my sister has 1DC.
She is a single parent but the Dad has 50/50 custody. I am not a single parent.
Every time we ask Grandmother to do anything with us, our DCs she is always doing something like picking up my sisters DC from school.
My son will be 1 soon and they've met him twice, Great Grandmother has never met him but she's also running around after sisters child on a daily basis.
Grandparent and Auntie share photos of my sisters DC daily on Facebook, ours never get a mention.
They take him to everything, ice skating, Christmas switch on, post it all on Facebook.
Am I being U to be upset about this and would you say something? I'm just fed up of wondering why my children mean nothing to them.